/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 10:51:19,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 10:51:19,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 10:51:19,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 10:51:19,999 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 10:51:20,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 10:51:20,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 10:51:20,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 10:51:20,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 10:51:20,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 10:51:20,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 10:51:20,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 10:51:20,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 10:51:20,023 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 10:51:20,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 10:51:20,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 10:51:20,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 10:51:20,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 10:51:20,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 10:51:20,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 10:51:20,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 10:51:20,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 10:51:20,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 10:51:20,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 10:51:20,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 10:51:20,057 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 10:51:20,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 10:51:20,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 10:51:20,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 10:51:20,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 10:51:20,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 10:51:20,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 10:51:20,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 10:51:20,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 10:51:20,068 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 10:51:20,068 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 10:51:20,069 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 10:51:20,069 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 10:51:20,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 10:51:20,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 10:51:20,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 10:51:20,071 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-16 10:51:20,092 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 10:51:20,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 10:51:20,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 10:51:20,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 10:51:20,094 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 10:51:20,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 10:51:20,094 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 10:51:20,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 10:51:20,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 10:51:20,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 10:51:20,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 10:51:20,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 10:51:20,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 10:51:20,095 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 10:51:20,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 10:51:20,096 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 10:51:20,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 10:51:20,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 10:51:20,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 10:51:20,096 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 10:51:20,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 10:51:20,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 10:51:20,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 10:51:20,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 10:51:20,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 10:51:20,098 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 10:51:20,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 10:51:20,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 10:51:20,098 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-16 10:51:20,098 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 10:51:20,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 10:51:20,405 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 10:51:20,412 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 10:51:20,413 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 10:51:20,415 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 10:51:20,416 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-10-16 10:51:20,475 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92a4c0008/21b94be584334d2eb0c86596b5720264/FLAGc9b6e3033 [2020-10-16 10:51:20,977 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 10:51:20,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-10-16 10:51:20,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92a4c0008/21b94be584334d2eb0c86596b5720264/FLAGc9b6e3033 [2020-10-16 10:51:21,244 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/92a4c0008/21b94be584334d2eb0c86596b5720264 [2020-10-16 10:51:21,253 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 10:51:21,255 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 10:51:21,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 10:51:21,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 10:51:21,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 10:51:21,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 10:51:21" (1/1) ... [2020-10-16 10:51:21,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50c49929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:21, skipping insertion in model container [2020-10-16 10:51:21,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 10:51:21" (1/1) ... [2020-10-16 10:51:21,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 10:51:21,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 10:51:21,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 10:51:21,871 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 10:51:21,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 10:51:21,976 INFO L208 MainTranslator]: Completed translation [2020-10-16 10:51:21,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:21 WrapperNode [2020-10-16 10:51:21,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 10:51:21,977 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 10:51:21,978 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 10:51:21,978 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 10:51:21,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:21" (1/1) ... [2020-10-16 10:51:21,999 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:21" (1/1) ... [2020-10-16 10:51:22,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 10:51:22,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 10:51:22,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 10:51:22,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 10:51:22,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:21" (1/1) ... [2020-10-16 10:51:22,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:21" (1/1) ... [2020-10-16 10:51:22,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:21" (1/1) ... [2020-10-16 10:51:22,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:21" (1/1) ... [2020-10-16 10:51:22,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:21" (1/1) ... [2020-10-16 10:51:22,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:21" (1/1) ... [2020-10-16 10:51:22,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:21" (1/1) ... [2020-10-16 10:51:22,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 10:51:22,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 10:51:22,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 10:51:22,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 10:51:22,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:22,107 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 10:51:22,107 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 10:51:22,107 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 10:51:22,107 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 10:51:22,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 10:51:22,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 10:51:22,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 10:51:22,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 10:51:22,109 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 10:51:22,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 10:51:22,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 10:51:22,113 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 10:51:22,393 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 10:51:22,393 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 10:51:22,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 10:51:22 BoogieIcfgContainer [2020-10-16 10:51:22,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 10:51:22,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 10:51:22,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 10:51:22,402 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 10:51:22,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 10:51:21" (1/3) ... [2020-10-16 10:51:22,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c5982a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 10:51:22, skipping insertion in model container [2020-10-16 10:51:22,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 10:51:21" (2/3) ... [2020-10-16 10:51:22,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c5982a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 10:51:22, skipping insertion in model container [2020-10-16 10:51:22,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 10:51:22" (3/3) ... [2020-10-16 10:51:22,406 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-10-16 10:51:22,420 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 10:51:22,420 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 10:51:22,437 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 10:51:22,438 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 10:51:22,466 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,467 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,467 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,467 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,468 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,468 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,469 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,469 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,469 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,470 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,470 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,470 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,471 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,471 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,472 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,472 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,472 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,472 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,473 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,473 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,474 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,474 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,474 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,475 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,475 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,475 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,476 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,476 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,480 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,480 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,480 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,481 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,481 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,481 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,486 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,487 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,487 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,487 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,488 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,488 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 10:51:22,490 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-16 10:51:22,504 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 10:51:22,526 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 10:51:22,526 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 10:51:22,526 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 10:51:22,527 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 10:51:22,527 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 10:51:22,527 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 10:51:22,527 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 10:51:22,527 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 10:51:22,552 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 10:51:22,558 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 10:51:22,566 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-16 10:51:22,570 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 10:51:22,616 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 10:51:22,617 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 10:51:22,622 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-16 10:51:22,625 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-16 10:51:23,853 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-16 10:51:23,853 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-16 10:51:23,860 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-16 10:51:23,872 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-16 10:51:23,874 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-16 10:51:23,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-16 10:51:23,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:23,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 10:51:23,882 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:23,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:23,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-16 10:51:23,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:23,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785464434] [2020-10-16 10:51:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:24,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785464434] [2020-10-16 10:51:24,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:51:24,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 10:51:24,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692501717] [2020-10-16 10:51:24,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 10:51:24,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:24,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 10:51:24,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 10:51:24,135 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-16 10:51:24,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:24,199 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-16 10:51:24,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 10:51:24,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-16 10:51:24,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:24,213 INFO L225 Difference]: With dead ends: 75 [2020-10-16 10:51:24,213 INFO L226 Difference]: Without dead ends: 42 [2020-10-16 10:51:24,214 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 [2020-10-16 10:51:24,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-16 10:51:24,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-16 10:51:24,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 10:51:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-16 10:51:24,253 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-16 10:51:24,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:24,254 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-16 10:51:24,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 10:51:24,254 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-16 10:51:24,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 10:51:24,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:24,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:24,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 10:51:24,256 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:24,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:24,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-16 10:51:24,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:24,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969271121] [2020-10-16 10:51:24,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:24,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969271121] [2020-10-16 10:51:24,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:51:24,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 10:51:24,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585004499] [2020-10-16 10:51:24,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 10:51:24,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:24,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 10:51:24,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 10:51:24,363 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-16 10:51:24,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:24,391 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-16 10:51:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 10:51:24,391 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-16 10:51:24,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:24,393 INFO L225 Difference]: With dead ends: 56 [2020-10-16 10:51:24,393 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 10:51:24,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:51:24,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 10:51:24,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-16 10:51:24,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 10:51:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-16 10:51:24,405 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-16 10:51:24,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:24,406 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-16 10:51:24,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 10:51:24,406 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-16 10:51:24,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:51:24,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:24,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:24,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 10:51:24,408 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:24,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:24,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-16 10:51:24,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:24,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876844152] [2020-10-16 10:51:24,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:24,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876844152] [2020-10-16 10:51:24,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:51:24,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:51:24,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19139701] [2020-10-16 10:51:24,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:51:24,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:24,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:51:24,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:51:24,481 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-16 10:51:24,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:24,552 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-16 10:51:24,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:51:24,553 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:51:24,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:24,554 INFO L225 Difference]: With dead ends: 78 [2020-10-16 10:51:24,554 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 10:51:24,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:24,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 10:51:24,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-16 10:51:24,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 10:51:24,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 10:51:24,564 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-16 10:51:24,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:24,564 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 10:51:24,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:51:24,565 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 10:51:24,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:51:24,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:24,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:24,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 10:51:24,566 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:24,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:24,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-16 10:51:24,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:24,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852428650] [2020-10-16 10:51:24,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:24,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852428650] [2020-10-16 10:51:24,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:51:24,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:51:24,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758028000] [2020-10-16 10:51:24,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:51:24,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:24,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:51:24,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:51:24,643 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-16 10:51:24,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:24,735 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-16 10:51:24,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:51:24,737 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:51:24,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:24,738 INFO L225 Difference]: With dead ends: 54 [2020-10-16 10:51:24,738 INFO L226 Difference]: Without dead ends: 43 [2020-10-16 10:51:24,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:24,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-16 10:51:24,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-16 10:51:24,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 10:51:24,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-16 10:51:24,748 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-16 10:51:24,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:24,748 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-16 10:51:24,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:51:24,748 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-16 10:51:24,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-16 10:51:24,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:24,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:24,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 10:51:24,750 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:24,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:24,750 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-16 10:51:24,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:24,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574442339] [2020-10-16 10:51:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:24,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574442339] [2020-10-16 10:51:24,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 10:51:24,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 10:51:24,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787172918] [2020-10-16 10:51:24,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 10:51:24,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:24,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 10:51:24,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-16 10:51:24,804 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-16 10:51:24,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:24,867 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-16 10:51:24,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 10:51:24,868 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-16 10:51:24,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:24,869 INFO L225 Difference]: With dead ends: 57 [2020-10-16 10:51:24,869 INFO L226 Difference]: Without dead ends: 51 [2020-10-16 10:51:24,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:24,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-16 10:51:24,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-16 10:51:24,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 10:51:24,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-16 10:51:24,875 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-16 10:51:24,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:24,875 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-16 10:51:24,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 10:51:24,876 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-16 10:51:24,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:51:24,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:24,877 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:24,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 10:51:24,877 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:24,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:24,877 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-16 10:51:24,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:24,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721793824] [2020-10-16 10:51:24,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:24,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721793824] [2020-10-16 10:51:24,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867343233] [2020-10-16 10:51:24,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:24,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:24,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:24,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:51:25,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:25,039 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:25,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:25,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 10:51:25,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536270308] [2020-10-16 10:51:25,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:51:25,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:25,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:51:25,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-16 10:51:25,054 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-16 10:51:25,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:25,159 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-16 10:51:25,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:51:25,160 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 10:51:25,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:25,161 INFO L225 Difference]: With dead ends: 48 [2020-10-16 10:51:25,161 INFO L226 Difference]: Without dead ends: 43 [2020-10-16 10:51:25,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:25,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-16 10:51:25,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-16 10:51:25,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 10:51:25,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-16 10:51:25,166 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-16 10:51:25,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:25,166 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-16 10:51:25,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:51:25,167 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-16 10:51:25,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:51:25,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:25,168 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:25,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 10:51:25,381 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:25,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:25,381 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-16 10:51:25,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:25,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192576447] [2020-10-16 10:51:25,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:25,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192576447] [2020-10-16 10:51:25,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343868002] [2020-10-16 10:51:25,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:25,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:25,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:25,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:51:25,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:25,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:25,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 10:51:25,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829027174] [2020-10-16 10:51:25,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 10:51:25,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:25,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 10:51:25,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-16 10:51:25,537 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-16 10:51:25,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:25,596 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-16 10:51:25,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 10:51:25,596 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-16 10:51:25,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:25,597 INFO L225 Difference]: With dead ends: 54 [2020-10-16 10:51:25,597 INFO L226 Difference]: Without dead ends: 48 [2020-10-16 10:51:25,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:25,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-16 10:51:25,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-16 10:51:25,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 10:51:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-16 10:51:25,603 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-16 10:51:25,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:25,603 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-16 10:51:25,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 10:51:25,604 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-16 10:51:25,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:51:25,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:25,605 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:25,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:25,818 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:25,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:25,818 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-16 10:51:25,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:25,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767992047] [2020-10-16 10:51:25,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:25,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:25,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767992047] [2020-10-16 10:51:25,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828871732] [2020-10-16 10:51:25,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:25,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:51:25,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:25,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:51:25,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:25,958 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:25,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:25,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 10:51:25,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675983396] [2020-10-16 10:51:25,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:51:25,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:25,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:51:25,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 10:51:25,973 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-16 10:51:26,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:26,060 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-16 10:51:26,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 10:51:26,061 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 10:51:26,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:26,062 INFO L225 Difference]: With dead ends: 58 [2020-10-16 10:51:26,062 INFO L226 Difference]: Without dead ends: 52 [2020-10-16 10:51:26,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:26,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-16 10:51:26,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-16 10:51:26,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-16 10:51:26,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-16 10:51:26,067 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-16 10:51:26,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:26,068 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-16 10:51:26,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:51:26,068 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-16 10:51:26,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:51:26,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:26,069 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:26,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:26,280 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:26,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:26,281 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-16 10:51:26,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:26,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312312091] [2020-10-16 10:51:26,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:26,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312312091] [2020-10-16 10:51:26,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642539807] [2020-10-16 10:51:26,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:26,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:51:26,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:26,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:26,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 10:51:26,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193391469] [2020-10-16 10:51:26,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 10:51:26,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:26,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 10:51:26,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-16 10:51:26,469 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-16 10:51:26,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:26,620 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-16 10:51:26,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:51:26,620 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-16 10:51:26,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:26,622 INFO L225 Difference]: With dead ends: 78 [2020-10-16 10:51:26,622 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 10:51:26,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:26,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 10:51:26,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-16 10:51:26,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 10:51:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-16 10:51:26,646 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-16 10:51:26,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:26,646 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-16 10:51:26,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 10:51:26,647 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-16 10:51:26,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 10:51:26,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:26,648 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:26,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:26,863 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:26,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:26,863 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-16 10:51:26,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:26,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899130608] [2020-10-16 10:51:26,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:26,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899130608] [2020-10-16 10:51:26,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851620848] [2020-10-16 10:51:26,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:26,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:26,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:26,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 10:51:26,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:26,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:27,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:27,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 10:51:27,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553523989] [2020-10-16 10:51:27,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:51:27,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:27,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:51:27,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 10:51:27,005 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-16 10:51:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:27,163 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-16 10:51:27,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:51:27,166 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-16 10:51:27,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:27,167 INFO L225 Difference]: With dead ends: 62 [2020-10-16 10:51:27,167 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 10:51:27,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:51:27,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 10:51:27,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-16 10:51:27,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-16 10:51:27,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-16 10:51:27,172 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-16 10:51:27,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:27,172 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-16 10:51:27,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:51:27,172 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-16 10:51:27,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:51:27,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:27,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:27,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 10:51:27,383 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:27,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:27,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-16 10:51:27,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:27,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441803042] [2020-10-16 10:51:27,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:27,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441803042] [2020-10-16 10:51:27,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107358291] [2020-10-16 10:51:27,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:27,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 10:51:27,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:27,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:51:27,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:27,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:27,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 10:51:27,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326012532] [2020-10-16 10:51:27,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:51:27,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:27,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:51:27,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 10:51:27,523 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-16 10:51:27,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:27,628 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-16 10:51:27,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:51:27,628 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-16 10:51:27,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:27,629 INFO L225 Difference]: With dead ends: 64 [2020-10-16 10:51:27,629 INFO L226 Difference]: Without dead ends: 58 [2020-10-16 10:51:27,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:27,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-16 10:51:27,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-16 10:51:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 10:51:27,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-16 10:51:27,639 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-16 10:51:27,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:27,640 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-16 10:51:27,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:51:27,640 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-16 10:51:27,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:51:27,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:27,642 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:27,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:27,851 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:27,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:27,852 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-16 10:51:27,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:27,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315378575] [2020-10-16 10:51:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:27,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315378575] [2020-10-16 10:51:27,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85097866] [2020-10-16 10:51:27,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:27,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:27,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:27,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:51:27,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:27,994 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:28,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:28,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 10:51:28,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623104031] [2020-10-16 10:51:28,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:51:28,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:28,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:51:28,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:28,006 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-16 10:51:28,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:28,169 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-16 10:51:28,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:51:28,169 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 10:51:28,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:28,170 INFO L225 Difference]: With dead ends: 61 [2020-10-16 10:51:28,170 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 10:51:28,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:51:28,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 10:51:28,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-16 10:51:28,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 10:51:28,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-16 10:51:28,175 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-16 10:51:28,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:28,176 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-16 10:51:28,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:51:28,176 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-16 10:51:28,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:51:28,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:28,177 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:28,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:28,390 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:28,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:28,391 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-16 10:51:28,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:28,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644000952] [2020-10-16 10:51:28,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:28,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644000952] [2020-10-16 10:51:28,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017778193] [2020-10-16 10:51:28,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:28,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:28,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:28,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:51:28,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:28,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:28,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 10:51:28,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748675457] [2020-10-16 10:51:28,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 10:51:28,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:28,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 10:51:28,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 10:51:28,534 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-16 10:51:28,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:28,669 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-16 10:51:28,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:51:28,670 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-16 10:51:28,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:28,671 INFO L225 Difference]: With dead ends: 77 [2020-10-16 10:51:28,671 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 10:51:28,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:51:28,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 10:51:28,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-16 10:51:28,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 10:51:28,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-16 10:51:28,677 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-16 10:51:28,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:28,678 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-16 10:51:28,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 10:51:28,678 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-16 10:51:28,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:51:28,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:28,679 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:28,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 10:51:28,880 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:28,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:28,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-16 10:51:28,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:28,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787414067] [2020-10-16 10:51:28,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:28,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787414067] [2020-10-16 10:51:28,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67195768] [2020-10-16 10:51:28,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:29,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 10:51:29,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:29,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:51:29,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:29,024 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:29,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:29,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 10:51:29,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174544563] [2020-10-16 10:51:29,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:51:29,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:29,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:51:29,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:29,033 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-16 10:51:29,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:29,243 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-16 10:51:29,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:51:29,244 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 10:51:29,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:29,244 INFO L225 Difference]: With dead ends: 58 [2020-10-16 10:51:29,244 INFO L226 Difference]: Without dead ends: 50 [2020-10-16 10:51:29,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:51:29,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-16 10:51:29,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-16 10:51:29,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-16 10:51:29,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-16 10:51:29,248 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-16 10:51:29,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:29,248 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-16 10:51:29,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:51:29,248 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-16 10:51:29,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-16 10:51:29,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:29,249 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:29,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:29,450 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:29,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:29,451 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-16 10:51:29,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:29,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149582321] [2020-10-16 10:51:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:29,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149582321] [2020-10-16 10:51:29,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441391785] [2020-10-16 10:51:29,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:29,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 10:51:29,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:29,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:29,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:29,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 10:51:29,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864463252] [2020-10-16 10:51:29,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:51:29,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:29,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:51:29,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:29,597 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-16 10:51:29,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:29,754 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-16 10:51:29,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:51:29,755 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-16 10:51:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:29,756 INFO L225 Difference]: With dead ends: 60 [2020-10-16 10:51:29,756 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 10:51:29,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:51:29,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 10:51:29,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-16 10:51:29,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 10:51:29,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 10:51:29,761 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-16 10:51:29,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:29,761 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 10:51:29,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:51:29,761 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 10:51:29,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:29,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:29,762 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:29,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 10:51:29,974 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:29,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:29,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-16 10:51:29,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:29,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237598719] [2020-10-16 10:51:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:30,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237598719] [2020-10-16 10:51:30,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656639148] [2020-10-16 10:51:30,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:30,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:30,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:30,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:51:30,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:30,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:30,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:30,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 10:51:30,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018453479] [2020-10-16 10:51:30,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:30,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:30,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:30,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:30,155 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-16 10:51:30,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:30,342 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-16 10:51:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:51:30,342 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 10:51:30,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:30,343 INFO L225 Difference]: With dead ends: 54 [2020-10-16 10:51:30,344 INFO L226 Difference]: Without dead ends: 49 [2020-10-16 10:51:30,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:51:30,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-16 10:51:30,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-16 10:51:30,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-16 10:51:30,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-16 10:51:30,348 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-16 10:51:30,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:30,348 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-16 10:51:30,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:30,348 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-16 10:51:30,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:30,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:30,349 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:30,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 10:51:30,556 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:30,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:30,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-16 10:51:30,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:30,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163190585] [2020-10-16 10:51:30,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:30,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163190585] [2020-10-16 10:51:30,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886819745] [2020-10-16 10:51:30,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:30,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:51:30,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:30,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:51:30,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:30,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:30,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 10:51:30,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397366559] [2020-10-16 10:51:30,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:51:30,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:30,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:51:30,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:30,690 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-16 10:51:30,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:30,782 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-16 10:51:30,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 10:51:30,783 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 10:51:30,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:30,784 INFO L225 Difference]: With dead ends: 60 [2020-10-16 10:51:30,784 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 10:51:30,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:30,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 10:51:30,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-16 10:51:30,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 10:51:30,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-16 10:51:30,788 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-16 10:51:30,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:30,789 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-16 10:51:30,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:51:30,789 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-16 10:51:30,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:30,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:30,790 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:30,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 10:51:30,999 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:31,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:31,000 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-16 10:51:31,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:31,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343269434] [2020-10-16 10:51:31,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:31,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343269434] [2020-10-16 10:51:31,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289286856] [2020-10-16 10:51:31,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:31,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:31,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:31,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:51:31,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:31,130 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:31,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:31,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 10:51:31,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211093764] [2020-10-16 10:51:31,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:31,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:31,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:31,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:31,145 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-16 10:51:31,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:31,272 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-16 10:51:31,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 10:51:31,272 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 10:51:31,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:31,273 INFO L225 Difference]: With dead ends: 66 [2020-10-16 10:51:31,273 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 10:51:31,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:51:31,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 10:51:31,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-16 10:51:31,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-16 10:51:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-16 10:51:31,278 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-16 10:51:31,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:31,278 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-16 10:51:31,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:31,278 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-16 10:51:31,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:31,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:31,279 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:31,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 10:51:31,490 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:31,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:31,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-16 10:51:31,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:31,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918726693] [2020-10-16 10:51:31,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:31,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918726693] [2020-10-16 10:51:31,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35154883] [2020-10-16 10:51:31,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:31,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:51:31,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:31,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:51:31,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:31,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:31,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 10:51:31,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173598401] [2020-10-16 10:51:31,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:51:31,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:31,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:51:31,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:31,649 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-16 10:51:31,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:31,795 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-16 10:51:31,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:51:31,796 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 10:51:31,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:31,797 INFO L225 Difference]: With dead ends: 67 [2020-10-16 10:51:31,797 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 10:51:31,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:51:31,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 10:51:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-16 10:51:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-16 10:51:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-16 10:51:31,801 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-16 10:51:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:31,801 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-16 10:51:31,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:51:31,801 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-16 10:51:31,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:31,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:31,802 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:32,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:32,011 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:32,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:32,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-16 10:51:32,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:32,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332256070] [2020-10-16 10:51:32,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:32,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332256070] [2020-10-16 10:51:32,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077552409] [2020-10-16 10:51:32,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:32,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:51:32,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:32,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:51:32,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:32,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:32,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:32,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 10:51:32,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719938689] [2020-10-16 10:51:32,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:32,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:32,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:32,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:32,156 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-16 10:51:32,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:32,363 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-16 10:51:32,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:51:32,364 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 10:51:32,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:32,364 INFO L225 Difference]: With dead ends: 69 [2020-10-16 10:51:32,364 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 10:51:32,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:51:32,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 10:51:32,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-16 10:51:32,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 10:51:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-16 10:51:32,368 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-16 10:51:32,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:32,368 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-16 10:51:32,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:32,368 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-16 10:51:32,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:32,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:32,369 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:32,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:32,577 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:32,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:32,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-16 10:51:32,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:32,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464508104] [2020-10-16 10:51:32,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:32,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464508104] [2020-10-16 10:51:32,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428960500] [2020-10-16 10:51:32,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:32,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:32,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:51:32,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:32,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:32,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 10:51:32,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670094000] [2020-10-16 10:51:32,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 10:51:32,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:32,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 10:51:32,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 10:51:32,700 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-16 10:51:32,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:32,876 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-16 10:51:32,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:32,877 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-16 10:51:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:32,879 INFO L225 Difference]: With dead ends: 88 [2020-10-16 10:51:32,879 INFO L226 Difference]: Without dead ends: 82 [2020-10-16 10:51:32,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:51:32,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-16 10:51:32,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-16 10:51:32,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 10:51:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-16 10:51:32,883 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-16 10:51:32,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:32,883 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-16 10:51:32,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 10:51:32,883 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-16 10:51:32,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-16 10:51:32,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:32,884 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:33,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:33,094 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:33,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:33,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-16 10:51:33,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:33,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130830521] [2020-10-16 10:51:33,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:33,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130830521] [2020-10-16 10:51:33,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078427005] [2020-10-16 10:51:33,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:33,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:33,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:33,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 10:51:33,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:33,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:33,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:33,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 10:51:33,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906623967] [2020-10-16 10:51:33,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:33,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:33,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:33,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:33,230 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-16 10:51:33,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:33,467 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-16 10:51:33,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:51:33,468 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-16 10:51:33,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:33,469 INFO L225 Difference]: With dead ends: 69 [2020-10-16 10:51:33,469 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 10:51:33,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:51:33,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 10:51:33,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-16 10:51:33,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 10:51:33,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-16 10:51:33,472 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-16 10:51:33,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:33,472 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-16 10:51:33,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:33,473 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-16 10:51:33,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:33,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:33,473 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:33,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 10:51:33,677 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:33,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:33,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-16 10:51:33,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:33,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120656592] [2020-10-16 10:51:33,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:33,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120656592] [2020-10-16 10:51:33,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451732474] [2020-10-16 10:51:33,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:33,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:51:33,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:33,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:51:33,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:33,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:33,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 10:51:33,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118745791] [2020-10-16 10:51:33,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:33,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:33,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:33,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:33,818 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-16 10:51:33,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:33,943 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-16 10:51:33,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:51:33,944 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 10:51:33,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:33,945 INFO L225 Difference]: With dead ends: 74 [2020-10-16 10:51:33,945 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 10:51:33,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:51:33,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 10:51:33,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-16 10:51:33,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 10:51:33,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 10:51:33,949 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-16 10:51:33,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:33,949 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 10:51:33,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:33,949 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 10:51:33,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:33,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:33,950 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:34,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 10:51:34,159 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:34,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:34,159 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-16 10:51:34,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:34,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534307260] [2020-10-16 10:51:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:34,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534307260] [2020-10-16 10:51:34,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148786242] [2020-10-16 10:51:34,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:34,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:34,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:34,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:51:34,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:34,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:34,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:34,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 10:51:34,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232464151] [2020-10-16 10:51:34,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:34,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:34,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:34,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:34,307 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-16 10:51:34,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:34,515 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-16 10:51:34,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:51:34,516 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 10:51:34,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:34,517 INFO L225 Difference]: With dead ends: 71 [2020-10-16 10:51:34,517 INFO L226 Difference]: Without dead ends: 65 [2020-10-16 10:51:34,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:51:34,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-16 10:51:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-16 10:51:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 10:51:34,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 10:51:34,520 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-16 10:51:34,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:34,520 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 10:51:34,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:34,521 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 10:51:34,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:34,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:34,521 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:34,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 10:51:34,729 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:34,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:34,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-16 10:51:34,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:34,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783156223] [2020-10-16 10:51:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:34,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783156223] [2020-10-16 10:51:34,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928347865] [2020-10-16 10:51:34,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:34,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 10:51:34,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:34,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:51:34,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:34,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:34,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 10:51:34,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741946180] [2020-10-16 10:51:34,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:34,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:34,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:34,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:34,885 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-16 10:51:35,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:35,050 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-16 10:51:35,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:51:35,051 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 10:51:35,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:35,052 INFO L225 Difference]: With dead ends: 68 [2020-10-16 10:51:35,052 INFO L226 Difference]: Without dead ends: 62 [2020-10-16 10:51:35,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:51:35,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-16 10:51:35,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-16 10:51:35,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 10:51:35,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 10:51:35,055 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-16 10:51:35,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:35,056 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 10:51:35,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:35,056 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 10:51:35,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:35,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:35,056 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:35,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 10:51:35,267 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:35,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:35,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-16 10:51:35,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:35,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445373593] [2020-10-16 10:51:35,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:35,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445373593] [2020-10-16 10:51:35,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555170684] [2020-10-16 10:51:35,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:35,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 10:51:35,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:35,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:51:35,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:35,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:35,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:35,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 10:51:35,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002299564] [2020-10-16 10:51:35,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:35,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:35,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:35,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:35,414 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-16 10:51:35,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:35,661 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-16 10:51:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:51:35,662 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 10:51:35,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:35,662 INFO L225 Difference]: With dead ends: 67 [2020-10-16 10:51:35,663 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 10:51:35,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:51:35,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 10:51:35,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-16 10:51:35,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 10:51:35,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 10:51:35,666 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-16 10:51:35,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:35,666 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 10:51:35,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:35,666 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 10:51:35,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:35,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:35,667 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:35,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 10:51:35,875 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:35,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:35,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-16 10:51:35,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:35,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724834003] [2020-10-16 10:51:35,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:35,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724834003] [2020-10-16 10:51:35,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617258010] [2020-10-16 10:51:35,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:35,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:51:35,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:35,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:35,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 10:51:35,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237912628] [2020-10-16 10:51:35,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 10:51:35,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:35,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 10:51:35,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 10:51:35,993 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-16 10:51:36,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:36,199 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-16 10:51:36,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:36,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-16 10:51:36,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:36,200 INFO L225 Difference]: With dead ends: 83 [2020-10-16 10:51:36,200 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 10:51:36,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:51:36,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 10:51:36,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-16 10:51:36,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 10:51:36,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-16 10:51:36,204 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-16 10:51:36,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:36,204 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-16 10:51:36,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 10:51:36,204 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-16 10:51:36,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:36,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:36,205 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:36,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:36,407 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:36,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:36,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-16 10:51:36,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:36,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304106969] [2020-10-16 10:51:36,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:36,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304106969] [2020-10-16 10:51:36,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157154842] [2020-10-16 10:51:36,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:36,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:36,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:36,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:36,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:36,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:36,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 10:51:36,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738779280] [2020-10-16 10:51:36,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:36,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:36,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:36,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:36,613 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-16 10:51:36,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:36,858 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-10-16 10:51:36,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:51:36,858 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 10:51:36,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:36,859 INFO L225 Difference]: With dead ends: 62 [2020-10-16 10:51:36,859 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 10:51:36,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:51:36,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 10:51:36,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-16 10:51:36,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-16 10:51:36,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-16 10:51:36,862 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-16 10:51:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:36,862 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-16 10:51:36,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:36,862 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-16 10:51:36,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 10:51:36,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:36,863 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:37,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 10:51:37,072 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:37,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:37,072 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-16 10:51:37,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:37,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989490869] [2020-10-16 10:51:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:37,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989490869] [2020-10-16 10:51:37,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000502269] [2020-10-16 10:51:37,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:37,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 10:51:37,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:37,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 10:51:37,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:37,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:37,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:37,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 10:51:37,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041306232] [2020-10-16 10:51:37,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:37,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:37,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:37,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:37,204 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-16 10:51:37,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:37,459 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-16 10:51:37,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:37,459 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-16 10:51:37,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:37,460 INFO L225 Difference]: With dead ends: 68 [2020-10-16 10:51:37,460 INFO L226 Difference]: Without dead ends: 63 [2020-10-16 10:51:37,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:51:37,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-16 10:51:37,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-16 10:51:37,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 10:51:37,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-16 10:51:37,465 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-16 10:51:37,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:37,465 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-16 10:51:37,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:37,465 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-16 10:51:37,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:37,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:37,466 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:37,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 10:51:37,667 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:37,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:37,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-16 10:51:37,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:37,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551504254] [2020-10-16 10:51:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:37,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551504254] [2020-10-16 10:51:37,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129609784] [2020-10-16 10:51:37,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:37,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:37,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:37,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:37,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:37,829 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:37,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:37,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 10:51:37,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634456010] [2020-10-16 10:51:37,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:37,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:37,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:37,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:37,840 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-16 10:51:38,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:38,119 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-16 10:51:38,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:38,120 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 10:51:38,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:38,121 INFO L225 Difference]: With dead ends: 60 [2020-10-16 10:51:38,121 INFO L226 Difference]: Without dead ends: 55 [2020-10-16 10:51:38,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:51:38,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-16 10:51:38,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-16 10:51:38,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-16 10:51:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-16 10:51:38,124 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-16 10:51:38,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:38,125 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-16 10:51:38,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:38,125 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-16 10:51:38,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:38,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:38,125 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:38,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:38,336 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:38,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:38,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-16 10:51:38,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:38,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066968972] [2020-10-16 10:51:38,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:38,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066968972] [2020-10-16 10:51:38,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692381117] [2020-10-16 10:51:38,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:38,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 10:51:38,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:38,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:38,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:38,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:38,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 10:51:38,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548511112] [2020-10-16 10:51:38,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:38,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:38,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:38,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:38,491 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-16 10:51:38,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:38,624 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-16 10:51:38,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 10:51:38,625 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 10:51:38,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:38,626 INFO L225 Difference]: With dead ends: 66 [2020-10-16 10:51:38,626 INFO L226 Difference]: Without dead ends: 60 [2020-10-16 10:51:38,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:51:38,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-16 10:51:38,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-16 10:51:38,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 10:51:38,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-16 10:51:38,629 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-16 10:51:38,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:38,629 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-16 10:51:38,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:38,629 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-16 10:51:38,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:38,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:38,630 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:38,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:38,837 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:38,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:38,838 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-16 10:51:38,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:38,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513755695] [2020-10-16 10:51:38,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:38,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513755695] [2020-10-16 10:51:38,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864776764] [2020-10-16 10:51:38,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:38,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 10:51:38,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:38,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:38,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:38,985 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:39,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:39,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 10:51:39,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808048132] [2020-10-16 10:51:39,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:39,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:39,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:39,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:39,005 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-16 10:51:39,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:39,172 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-16 10:51:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 10:51:39,172 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 10:51:39,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:39,173 INFO L225 Difference]: With dead ends: 74 [2020-10-16 10:51:39,173 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 10:51:39,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:51:39,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 10:51:39,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-16 10:51:39,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-16 10:51:39,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-16 10:51:39,176 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-16 10:51:39,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:39,176 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-16 10:51:39,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:39,177 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-16 10:51:39,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:39,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:39,177 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:39,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-16 10:51:39,387 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:39,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:39,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-16 10:51:39,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:39,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191426749] [2020-10-16 10:51:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:39,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191426749] [2020-10-16 10:51:39,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493786573] [2020-10-16 10:51:39,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:39,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:39,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:39,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:39,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 10:51:39,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905735594] [2020-10-16 10:51:39,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:39,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:39,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:39,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:39,514 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-16 10:51:39,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:39,697 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-16 10:51:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:39,697 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 10:51:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:39,698 INFO L225 Difference]: With dead ends: 75 [2020-10-16 10:51:39,699 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 10:51:39,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:51:39,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 10:51:39,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-16 10:51:39,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-16 10:51:39,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-16 10:51:39,702 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-16 10:51:39,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:39,702 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-16 10:51:39,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:39,702 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-16 10:51:39,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:39,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:39,703 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:39,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:39,904 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:39,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:39,905 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-16 10:51:39,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:39,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346885111] [2020-10-16 10:51:39,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:39,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346885111] [2020-10-16 10:51:39,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711410574] [2020-10-16 10:51:39,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:40,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:40,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:40,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:40,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:40,046 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:40,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:40,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 10:51:40,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422179364] [2020-10-16 10:51:40,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:40,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:40,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:40,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:40,066 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-16 10:51:40,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:40,298 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-16 10:51:40,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:51:40,299 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 10:51:40,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:40,300 INFO L225 Difference]: With dead ends: 79 [2020-10-16 10:51:40,300 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 10:51:40,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:51:40,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 10:51:40,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-16 10:51:40,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 10:51:40,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-16 10:51:40,303 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-16 10:51:40,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:40,303 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-16 10:51:40,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:40,303 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-16 10:51:40,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:40,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:40,304 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:40,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 10:51:40,513 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:40,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:40,513 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-16 10:51:40,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:40,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305661319] [2020-10-16 10:51:40,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:40,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305661319] [2020-10-16 10:51:40,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401009146] [2020-10-16 10:51:40,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:40,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 10:51:40,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:40,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:40,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:40,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:40,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 10:51:40,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565405449] [2020-10-16 10:51:40,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:40,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:40,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:40,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:40,648 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-16 10:51:40,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:40,855 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-16 10:51:40,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:51:40,858 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 10:51:40,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:40,859 INFO L225 Difference]: With dead ends: 79 [2020-10-16 10:51:40,859 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 10:51:40,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:51:40,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 10:51:40,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-16 10:51:40,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 10:51:40,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-16 10:51:40,862 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-16 10:51:40,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:40,863 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-16 10:51:40,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:40,863 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-16 10:51:40,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:40,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:40,863 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:41,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:41,074 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:41,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:41,074 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-16 10:51:41,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:41,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175793561] [2020-10-16 10:51:41,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:41,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175793561] [2020-10-16 10:51:41,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742008421] [2020-10-16 10:51:41,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:41,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:41,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:41,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:41,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:41,218 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:41,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:41,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 10:51:41,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253975313] [2020-10-16 10:51:41,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:41,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:41,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:41,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:41,229 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-16 10:51:41,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:41,550 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-16 10:51:41,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:51:41,551 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 10:51:41,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:41,551 INFO L225 Difference]: With dead ends: 76 [2020-10-16 10:51:41,552 INFO L226 Difference]: Without dead ends: 70 [2020-10-16 10:51:41,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:51:41,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-16 10:51:41,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-16 10:51:41,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 10:51:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-16 10:51:41,555 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-16 10:51:41,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:41,555 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-16 10:51:41,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:41,555 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-16 10:51:41,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:41,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:41,556 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:41,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 10:51:41,757 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:41,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:41,757 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-16 10:51:41,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:41,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496260039] [2020-10-16 10:51:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:41,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496260039] [2020-10-16 10:51:41,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270139700] [2020-10-16 10:51:41,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:41,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 10:51:41,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:41,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 10:51:41,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:41,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:41,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 10:51:41,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137908304] [2020-10-16 10:51:41,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 10:51:41,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:41,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 10:51:41,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 10:51:41,879 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-16 10:51:42,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:42,177 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-16 10:51:42,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:51:42,177 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-16 10:51:42,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:42,178 INFO L225 Difference]: With dead ends: 96 [2020-10-16 10:51:42,179 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 10:51:42,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:51:42,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 10:51:42,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-16 10:51:42,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 10:51:42,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-16 10:51:42,182 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-16 10:51:42,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:42,182 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-16 10:51:42,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 10:51:42,182 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-16 10:51:42,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 10:51:42,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:42,183 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:42,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 10:51:42,392 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:42,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:42,392 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-16 10:51:42,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:42,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112587583] [2020-10-16 10:51:42,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:42,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112587583] [2020-10-16 10:51:42,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962864775] [2020-10-16 10:51:42,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:42,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 10:51:42,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:42,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:42,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:42,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:42,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 10:51:42,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489772452] [2020-10-16 10:51:42,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:42,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:42,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:42,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:42,534 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-16 10:51:42,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:42,860 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-16 10:51:42,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:51:42,861 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-16 10:51:42,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:42,862 INFO L225 Difference]: With dead ends: 77 [2020-10-16 10:51:42,862 INFO L226 Difference]: Without dead ends: 69 [2020-10-16 10:51:42,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:51:42,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-16 10:51:42,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-16 10:51:42,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 10:51:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-16 10:51:42,865 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-16 10:51:42,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:42,865 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-16 10:51:42,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:42,866 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-16 10:51:42,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:42,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:42,866 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:43,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-16 10:51:43,075 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:43,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:43,075 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-16 10:51:43,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:43,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531318619] [2020-10-16 10:51:43,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:43,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531318619] [2020-10-16 10:51:43,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720941936] [2020-10-16 10:51:43,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:43,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:43,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:43,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:43,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 10:51:43,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659449901] [2020-10-16 10:51:43,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:43,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:43,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:43,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:43,246 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-16 10:51:43,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:43,400 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-16 10:51:43,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:51:43,401 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 10:51:43,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:43,401 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:51:43,401 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 10:51:43,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:51:43,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 10:51:43,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-16 10:51:43,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 10:51:43,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 10:51:43,405 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 10:51:43,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:43,405 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 10:51:43,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:43,405 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 10:51:43,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:43,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:43,406 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:43,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 10:51:43,615 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:43,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:43,615 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-16 10:51:43,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:43,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418580760] [2020-10-16 10:51:43,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:43,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418580760] [2020-10-16 10:51:43,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469745934] [2020-10-16 10:51:43,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:43,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:43,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:43,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:43,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:43,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:43,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:43,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 10:51:43,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865683446] [2020-10-16 10:51:43,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:43,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:43,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:43,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:43,789 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 10:51:44,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:44,030 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-16 10:51:44,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:51:44,030 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 10:51:44,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:44,031 INFO L225 Difference]: With dead ends: 81 [2020-10-16 10:51:44,031 INFO L226 Difference]: Without dead ends: 75 [2020-10-16 10:51:44,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:51:44,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-16 10:51:44,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-16 10:51:44,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 10:51:44,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 10:51:44,034 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 10:51:44,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:44,034 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 10:51:44,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:44,034 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 10:51:44,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:44,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:44,035 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:44,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 10:51:44,242 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:44,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:44,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-16 10:51:44,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:44,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620167220] [2020-10-16 10:51:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:44,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620167220] [2020-10-16 10:51:44,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865179943] [2020-10-16 10:51:44,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:44,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 10:51:44,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:44,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:44,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:44,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:44,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 10:51:44,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385283030] [2020-10-16 10:51:44,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:44,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:44,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:44,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:44,380 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 10:51:44,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:44,589 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-16 10:51:44,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:44,590 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 10:51:44,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:44,591 INFO L225 Difference]: With dead ends: 78 [2020-10-16 10:51:44,591 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 10:51:44,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:51:44,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 10:51:44,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-16 10:51:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 10:51:44,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 10:51:44,593 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 10:51:44,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:44,594 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 10:51:44,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:44,594 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 10:51:44,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:44,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:44,595 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:44,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-16 10:51:44,797 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:44,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:44,797 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-16 10:51:44,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:44,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006357388] [2020-10-16 10:51:44,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:44,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006357388] [2020-10-16 10:51:44,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913537015] [2020-10-16 10:51:44,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:44,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:44,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:44,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:44,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:44,946 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:44,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:44,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 10:51:44,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204912551] [2020-10-16 10:51:44,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:44,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:44,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:44,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:44,956 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 10:51:45,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:45,269 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-16 10:51:45,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:51:45,270 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 10:51:45,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:45,270 INFO L225 Difference]: With dead ends: 77 [2020-10-16 10:51:45,270 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 10:51:45,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:51:45,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 10:51:45,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-16 10:51:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 10:51:45,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 10:51:45,274 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 10:51:45,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:45,274 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 10:51:45,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 10:51:45,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:45,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:45,275 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:45,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 10:51:45,481 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:45,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:45,481 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-16 10:51:45,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:45,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73144119] [2020-10-16 10:51:45,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:45,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73144119] [2020-10-16 10:51:45,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766219647] [2020-10-16 10:51:45,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:45,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 10:51:45,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:45,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:45,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:45,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:45,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 10:51:45,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730297689] [2020-10-16 10:51:45,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:45,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:45,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:45,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:45,640 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 10:51:45,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:45,990 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-16 10:51:45,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:51:45,991 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 10:51:45,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:45,992 INFO L225 Difference]: With dead ends: 74 [2020-10-16 10:51:45,992 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 10:51:45,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:51:45,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 10:51:45,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-16 10:51:45,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 10:51:45,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 10:51:45,998 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-16 10:51:45,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:45,998 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 10:51:45,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:45,998 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 10:51:45,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:45,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:45,999 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:46,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:46,209 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:46,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:46,210 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-16 10:51:46,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:46,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733995606] [2020-10-16 10:51:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:46,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733995606] [2020-10-16 10:51:46,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192880562] [2020-10-16 10:51:46,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:46,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 10:51:46,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:46,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:46,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:46,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:46,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:46,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 10:51:46,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033212162] [2020-10-16 10:51:46,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:46,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:46,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:46,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:46,373 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-16 10:51:46,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:46,739 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-16 10:51:46,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:51:46,741 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 10:51:46,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:46,742 INFO L225 Difference]: With dead ends: 73 [2020-10-16 10:51:46,742 INFO L226 Difference]: Without dead ends: 67 [2020-10-16 10:51:46,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:51:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-16 10:51:46,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-16 10:51:46,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 10:51:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 10:51:46,745 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-16 10:51:46,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:46,745 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 10:51:46,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:46,745 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 10:51:46,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:46,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:46,746 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:46,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 10:51:46,955 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:46,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:46,956 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-16 10:51:46,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:46,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281007508] [2020-10-16 10:51:46,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:47,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281007508] [2020-10-16 10:51:47,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165163459] [2020-10-16 10:51:47,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:47,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:47,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:47,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:47,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 10:51:47,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193894703] [2020-10-16 10:51:47,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 10:51:47,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:47,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 10:51:47,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 10:51:47,092 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-16 10:51:47,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:47,380 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-16 10:51:47,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:51:47,381 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-16 10:51:47,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:47,382 INFO L225 Difference]: With dead ends: 89 [2020-10-16 10:51:47,382 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 10:51:47,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:51:47,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 10:51:47,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-16 10:51:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 10:51:47,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-16 10:51:47,386 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-16 10:51:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:47,386 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-16 10:51:47,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 10:51:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-16 10:51:47,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:47,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:47,386 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:47,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:47,587 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:47,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:47,588 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-16 10:51:47,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:47,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045493734] [2020-10-16 10:51:47,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:47,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045493734] [2020-10-16 10:51:47,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222404620] [2020-10-16 10:51:47,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:47,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:47,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:47,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:47,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:47,725 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:47,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:47,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 10:51:47,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380604382] [2020-10-16 10:51:47,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:47,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:47,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:47,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:47,739 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-16 10:51:48,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:48,135 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-10-16 10:51:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:51:48,136 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 10:51:48,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:48,137 INFO L225 Difference]: With dead ends: 70 [2020-10-16 10:51:48,137 INFO L226 Difference]: Without dead ends: 62 [2020-10-16 10:51:48,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:51:48,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-16 10:51:48,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-10-16 10:51:48,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-16 10:51:48,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-16 10:51:48,140 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-16 10:51:48,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:48,140 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-16 10:51:48,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:48,141 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-16 10:51:48,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 10:51:48,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:48,141 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:48,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-16 10:51:48,349 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:48,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:48,349 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-16 10:51:48,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:48,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634594081] [2020-10-16 10:51:48,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:48,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634594081] [2020-10-16 10:51:48,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734094147] [2020-10-16 10:51:48,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:48,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 10:51:48,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:48,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 10:51:48,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:48,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:48,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:48,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 10:51:48,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015022077] [2020-10-16 10:51:48,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:48,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:48,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:48,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:48,491 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-16 10:51:48,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:48,852 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-16 10:51:48,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:51:48,853 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-16 10:51:48,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:48,853 INFO L225 Difference]: With dead ends: 76 [2020-10-16 10:51:48,854 INFO L226 Difference]: Without dead ends: 71 [2020-10-16 10:51:48,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:51:48,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-16 10:51:48,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-16 10:51:48,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 10:51:48,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-16 10:51:48,856 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-16 10:51:48,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:48,856 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-16 10:51:48,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:48,856 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-16 10:51:48,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:48,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:48,857 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:49,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:49,067 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:49,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:49,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-16 10:51:49,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:49,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624832928] [2020-10-16 10:51:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:49,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624832928] [2020-10-16 10:51:49,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275543525] [2020-10-16 10:51:49,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:49,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:49,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:49,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:49,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:49,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:51:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:49,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:49,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 10:51:49,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831626510] [2020-10-16 10:51:49,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:49,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:49,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:49,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:49,226 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-16 10:51:49,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:49,616 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-16 10:51:49,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:51:49,617 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 10:51:49,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:49,618 INFO L225 Difference]: With dead ends: 66 [2020-10-16 10:51:49,618 INFO L226 Difference]: Without dead ends: 61 [2020-10-16 10:51:49,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:51:49,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-16 10:51:49,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-16 10:51:49,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-16 10:51:49,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-16 10:51:49,621 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-16 10:51:49,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:49,622 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-16 10:51:49,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:49,622 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-16 10:51:49,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:49,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:49,623 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:49,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-16 10:51:49,831 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:49,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:49,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-16 10:51:49,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:49,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686591047] [2020-10-16 10:51:49,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:49,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686591047] [2020-10-16 10:51:49,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350268197] [2020-10-16 10:51:49,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:50,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 10:51:50,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:50,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:50,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:50,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:50,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 10:51:50,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379765736] [2020-10-16 10:51:50,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:50,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:50,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:50,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:50,025 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-16 10:51:50,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:50,200 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-16 10:51:50,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 10:51:50,201 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 10:51:50,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:50,202 INFO L225 Difference]: With dead ends: 72 [2020-10-16 10:51:50,202 INFO L226 Difference]: Without dead ends: 66 [2020-10-16 10:51:50,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:51:50,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-16 10:51:50,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-16 10:51:50,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 10:51:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-16 10:51:50,205 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-16 10:51:50,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:50,205 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-16 10:51:50,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:50,206 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-16 10:51:50,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:50,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:50,206 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:50,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 10:51:50,413 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:50,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:50,414 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-16 10:51:50,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:50,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247099190] [2020-10-16 10:51:50,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:50,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247099190] [2020-10-16 10:51:50,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354952168] [2020-10-16 10:51:50,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:50,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 10:51:50,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:50,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:50,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:50,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:50,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:50,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:50,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 10:51:50,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373042796] [2020-10-16 10:51:50,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:50,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:50,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:50,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:50,622 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-16 10:51:50,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:50,874 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-16 10:51:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 10:51:50,875 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 10:51:50,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:50,876 INFO L225 Difference]: With dead ends: 82 [2020-10-16 10:51:50,876 INFO L226 Difference]: Without dead ends: 76 [2020-10-16 10:51:50,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:51:50,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-16 10:51:50,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-16 10:51:50,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-16 10:51:50,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-16 10:51:50,879 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-16 10:51:50,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:50,879 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-16 10:51:50,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:50,879 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-16 10:51:50,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:50,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:50,880 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:51,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-16 10:51:51,090 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:51,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:51,091 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-16 10:51:51,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:51,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417841066] [2020-10-16 10:51:51,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:51,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417841066] [2020-10-16 10:51:51,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773130528] [2020-10-16 10:51:51,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:51,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:51,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:51,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:51,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:51,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 10:51:51,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549706793] [2020-10-16 10:51:51,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:51,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:51,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:51,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:51,253 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-16 10:51:51,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:51,485 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-16 10:51:51,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:51:51,486 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 10:51:51,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:51,487 INFO L225 Difference]: With dead ends: 83 [2020-10-16 10:51:51,488 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 10:51:51,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:51:51,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 10:51:51,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-16 10:51:51,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-16 10:51:51,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-16 10:51:51,491 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-16 10:51:51,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:51,491 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-16 10:51:51,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:51,491 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-16 10:51:51,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:51,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:51,492 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:51,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-16 10:51:51,696 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:51,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-16 10:51:51,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:51,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072607084] [2020-10-16 10:51:51,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:51,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072607084] [2020-10-16 10:51:51,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951858292] [2020-10-16 10:51:51,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:51,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:51,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:51,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:51,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:51,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:51,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:51,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:51,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 10:51:51,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068670702] [2020-10-16 10:51:51,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:51,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:51,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:51,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:51,948 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-16 10:51:52,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:52,319 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-16 10:51:52,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:51:52,322 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 10:51:52,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:52,323 INFO L225 Difference]: With dead ends: 89 [2020-10-16 10:51:52,323 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 10:51:52,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:51:52,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 10:51:52,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-16 10:51:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 10:51:52,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-16 10:51:52,332 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-16 10:51:52,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:52,332 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-16 10:51:52,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:52,333 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-16 10:51:52,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:52,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:52,333 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:52,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:52,544 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:52,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:52,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-16 10:51:52,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:52,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025615909] [2020-10-16 10:51:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:52,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025615909] [2020-10-16 10:51:52,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170781346] [2020-10-16 10:51:52,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:52,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 10:51:52,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:52,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:52,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:52,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:52,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 10:51:52,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174437387] [2020-10-16 10:51:52,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:52,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:52,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:52,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:52,746 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-16 10:51:53,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:53,027 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-16 10:51:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:51:53,027 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 10:51:53,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:53,028 INFO L225 Difference]: With dead ends: 89 [2020-10-16 10:51:53,028 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 10:51:53,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:51:53,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 10:51:53,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-16 10:51:53,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 10:51:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-16 10:51:53,031 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-16 10:51:53,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:53,031 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-16 10:51:53,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:53,031 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-16 10:51:53,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:53,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:53,032 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:53,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:53,233 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:53,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:53,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-16 10:51:53,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:53,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262738465] [2020-10-16 10:51:53,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:53,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262738465] [2020-10-16 10:51:53,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616612159] [2020-10-16 10:51:53,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:53,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:53,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:53,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:53,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:53,398 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:53,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:53,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 10:51:53,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108605576] [2020-10-16 10:51:53,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:53,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:53,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:53,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:53,414 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-16 10:51:53,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:53,758 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-16 10:51:53,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:51:53,759 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 10:51:53,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:53,760 INFO L225 Difference]: With dead ends: 86 [2020-10-16 10:51:53,760 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 10:51:53,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:51:53,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 10:51:53,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-16 10:51:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 10:51:53,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-16 10:51:53,765 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-16 10:51:53,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:53,765 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-16 10:51:53,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:53,765 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-16 10:51:53,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:53,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:53,766 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:53,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-16 10:51:53,975 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:53,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:53,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-16 10:51:53,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:53,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523235363] [2020-10-16 10:51:53,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:54,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523235363] [2020-10-16 10:51:54,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138401349] [2020-10-16 10:51:54,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:54,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 10:51:54,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:54,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:54,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:54,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:54,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 10:51:54,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156272537] [2020-10-16 10:51:54,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:54,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:54,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:54,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:54,191 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-16 10:51:54,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:54,495 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-16 10:51:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:51:54,495 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 10:51:54,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:54,496 INFO L225 Difference]: With dead ends: 87 [2020-10-16 10:51:54,496 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 10:51:54,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:51:54,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 10:51:54,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-16 10:51:54,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-16 10:51:54,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-16 10:51:54,499 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-16 10:51:54,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:54,499 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-16 10:51:54,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:54,499 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-16 10:51:54,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:54,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:54,500 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:54,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:54,709 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:54,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:54,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-16 10:51:54,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:54,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977468235] [2020-10-16 10:51:54,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:54,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977468235] [2020-10-16 10:51:54,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161104746] [2020-10-16 10:51:54,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:54,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 10:51:54,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:54,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:54,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:54,864 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:54,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:54,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:54,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 10:51:54,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231709150] [2020-10-16 10:51:54,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:54,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:54,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:54,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:54,880 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-16 10:51:55,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:55,301 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-16 10:51:55,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:51:55,302 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 10:51:55,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:55,303 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:51:55,303 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 10:51:55,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:51:55,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 10:51:55,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-16 10:51:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 10:51:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-16 10:51:55,306 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-16 10:51:55,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:55,307 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-16 10:51:55,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:55,307 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-16 10:51:55,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:55,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:55,307 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:55,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-16 10:51:55,518 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:55,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:55,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-16 10:51:55,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:55,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561881712] [2020-10-16 10:51:55,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:55,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561881712] [2020-10-16 10:51:55,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495022638] [2020-10-16 10:51:55,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:55,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:55,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:55,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:55,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 10:51:55,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534315597] [2020-10-16 10:51:55,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 10:51:55,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:55,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 10:51:55,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 10:51:55,665 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-16 10:51:56,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:56,033 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-16 10:51:56,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:51:56,034 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-16 10:51:56,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:56,035 INFO L225 Difference]: With dead ends: 104 [2020-10-16 10:51:56,035 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 10:51:56,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:51:56,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 10:51:56,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-16 10:51:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 10:51:56,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-16 10:51:56,037 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-16 10:51:56,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:56,038 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-16 10:51:56,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 10:51:56,038 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-16 10:51:56,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 10:51:56,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:56,038 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:56,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 10:51:56,249 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:56,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:56,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-16 10:51:56,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:56,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246775857] [2020-10-16 10:51:56,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:56,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246775857] [2020-10-16 10:51:56,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264976380] [2020-10-16 10:51:56,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:56,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:51:56,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:56,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 10:51:56,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:56,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:56,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:56,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 10:51:56,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172516397] [2020-10-16 10:51:56,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:56,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:56,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:56,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:56,414 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-16 10:51:56,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:56,864 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-16 10:51:56,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:51:56,864 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-16 10:51:56,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:56,865 INFO L225 Difference]: With dead ends: 85 [2020-10-16 10:51:56,865 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 10:51:56,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:51:56,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 10:51:56,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-16 10:51:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 10:51:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-16 10:51:56,868 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-16 10:51:56,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:56,868 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-16 10:51:56,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:56,868 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-16 10:51:56,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:51:56,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:56,869 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:57,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-16 10:51:57,069 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:57,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:57,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-16 10:51:57,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:57,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850669315] [2020-10-16 10:51:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:57,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850669315] [2020-10-16 10:51:57,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733245277] [2020-10-16 10:51:57,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:57,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 10:51:57,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:57,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:51:57,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:57,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:57,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 10:51:57,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299737885] [2020-10-16 10:51:57,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:57,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:57,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:57,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:57,294 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-16 10:51:57,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:57,486 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-16 10:51:57,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:51:57,487 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 10:51:57,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:57,488 INFO L225 Difference]: With dead ends: 94 [2020-10-16 10:51:57,488 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 10:51:57,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-16 10:51:57,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 10:51:57,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-16 10:51:57,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 10:51:57,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 10:51:57,491 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 10:51:57,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:57,491 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 10:51:57,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:57,491 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 10:51:57,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:51:57,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:57,492 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:57,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-16 10:51:57,700 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:57,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:57,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-16 10:51:57,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:57,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256090704] [2020-10-16 10:51:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:57,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256090704] [2020-10-16 10:51:57,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296922502] [2020-10-16 10:51:57,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:57,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:51:57,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:57,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:51:57,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:57,881 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:57,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:57,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 10:51:57,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187639903] [2020-10-16 10:51:57,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:51:57,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:57,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:51:57,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:51:57,894 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 10:51:58,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:58,172 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-16 10:51:58,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:51:58,173 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 10:51:58,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:58,174 INFO L225 Difference]: With dead ends: 91 [2020-10-16 10:51:58,174 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 10:51:58,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:51:58,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 10:51:58,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-16 10:51:58,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:51:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 10:51:58,176 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 10:51:58,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:58,177 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 10:51:58,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:51:58,177 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 10:51:58,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:51:58,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:58,178 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:58,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-16 10:51:58,379 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:58,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:58,379 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-16 10:51:58,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:58,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305624444] [2020-10-16 10:51:58,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:58,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:58,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305624444] [2020-10-16 10:51:58,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4705655] [2020-10-16 10:51:58,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:58,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 10:51:58,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:58,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:51:58,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:58,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:58,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 10:51:58,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490091363] [2020-10-16 10:51:58,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:58,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:58,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:58,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:58,557 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 10:51:58,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:58,817 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-16 10:51:58,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:51:58,818 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 10:51:58,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:58,818 INFO L225 Difference]: With dead ends: 88 [2020-10-16 10:51:58,818 INFO L226 Difference]: Without dead ends: 82 [2020-10-16 10:51:58,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-16 10:51:58,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-16 10:51:58,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-16 10:51:58,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 10:51:58,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 10:51:58,820 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 10:51:58,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:58,821 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 10:51:58,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:51:58,821 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 10:51:58,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:51:58,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:58,821 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:59,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:59,026 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:59,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:59,026 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-16 10:51:59,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:59,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547459013] [2020-10-16 10:51:59,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:59,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547459013] [2020-10-16 10:51:59,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316323670] [2020-10-16 10:51:59,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:59,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 10:51:59,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:51:59,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:51:59,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:59,206 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:51:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:59,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:59,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 10:51:59,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160084000] [2020-10-16 10:51:59,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:51:59,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:59,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:51:59,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:51:59,221 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 10:51:59,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:51:59,573 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-16 10:51:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:51:59,574 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 10:51:59,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:51:59,574 INFO L225 Difference]: With dead ends: 87 [2020-10-16 10:51:59,575 INFO L226 Difference]: Without dead ends: 81 [2020-10-16 10:51:59,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:51:59,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-16 10:51:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-16 10:51:59,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:51:59,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 10:51:59,580 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 10:51:59,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:51:59,581 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 10:51:59,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:51:59,581 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 10:51:59,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:51:59,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:51:59,581 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:51:59,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:51:59,789 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:51:59,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:51:59,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-16 10:51:59,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:51:59,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589294696] [2020-10-16 10:51:59,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:51:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:59,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589294696] [2020-10-16 10:51:59,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977781674] [2020-10-16 10:51:59,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:51:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:51:59,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:51:59,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:51:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:51:59,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:51:59,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 10:51:59,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761814012] [2020-10-16 10:51:59,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:51:59,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:51:59,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:51:59,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:51:59,971 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 10:52:00,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:00,270 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-16 10:52:00,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:52:00,270 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 10:52:00,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:00,271 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:52:00,271 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 10:52:00,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:52:00,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 10:52:00,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-16 10:52:00,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 10:52:00,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 10:52:00,274 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 10:52:00,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:00,275 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 10:52:00,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:52:00,275 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 10:52:00,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:00,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:00,275 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:00,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-16 10:52:00,476 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:00,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:00,477 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-16 10:52:00,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:00,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790944944] [2020-10-16 10:52:00,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:00,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790944944] [2020-10-16 10:52:00,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820068302] [2020-10-16 10:52:00,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:00,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:00,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:00,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:00,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:00,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:00,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:00,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 10:52:00,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422020095] [2020-10-16 10:52:00,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:00,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:00,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:00,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:00,661 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 10:52:01,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:01,072 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-16 10:52:01,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:52:01,072 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 10:52:01,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:01,073 INFO L225 Difference]: With dead ends: 83 [2020-10-16 10:52:01,073 INFO L226 Difference]: Without dead ends: 77 [2020-10-16 10:52:01,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:52:01,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-16 10:52:01,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-16 10:52:01,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:52:01,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 10:52:01,076 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 10:52:01,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:01,076 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 10:52:01,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 10:52:01,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:01,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:01,077 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:01,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:01,285 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:01,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:01,285 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-16 10:52:01,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:01,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171783262] [2020-10-16 10:52:01,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:01,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171783262] [2020-10-16 10:52:01,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114312820] [2020-10-16 10:52:01,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:01,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 10:52:01,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:01,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:01,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:01,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:01,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 10:52:01,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913239637] [2020-10-16 10:52:01,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:52:01,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:01,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:52:01,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:52:01,449 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 10:52:01,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:01,797 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-16 10:52:01,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:52:01,798 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 10:52:01,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:01,798 INFO L225 Difference]: With dead ends: 80 [2020-10-16 10:52:01,799 INFO L226 Difference]: Without dead ends: 74 [2020-10-16 10:52:01,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:52:01,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-16 10:52:01,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-16 10:52:01,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 10:52:01,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 10:52:01,801 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-16 10:52:01,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:01,802 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 10:52:01,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:52:01,802 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 10:52:01,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:01,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:01,803 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:02,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-16 10:52:02,006 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:02,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:02,006 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-16 10:52:02,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:02,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82943552] [2020-10-16 10:52:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:02,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82943552] [2020-10-16 10:52:02,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339362066] [2020-10-16 10:52:02,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:02,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:02,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:02,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:02,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:02,165 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:02,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:02,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 10:52:02,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107931927] [2020-10-16 10:52:02,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:02,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:02,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:02,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:02,184 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-16 10:52:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:02,676 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-16 10:52:02,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:52:02,677 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 10:52:02,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:02,678 INFO L225 Difference]: With dead ends: 79 [2020-10-16 10:52:02,678 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 10:52:02,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:52:02,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 10:52:02,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-16 10:52:02,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:52:02,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 10:52:02,680 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-16 10:52:02,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:02,680 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 10:52:02,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:02,681 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 10:52:02,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:02,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:02,681 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:02,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:02,882 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:02,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:02,883 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-16 10:52:02,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:02,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030793233] [2020-10-16 10:52:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:02,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030793233] [2020-10-16 10:52:02,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605975892] [2020-10-16 10:52:02,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:03,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 10:52:03,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:03,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:03,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:03,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:03,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 10:52:03,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126097439] [2020-10-16 10:52:03,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 10:52:03,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:03,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 10:52:03,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 10:52:03,064 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-16 10:52:03,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:03,449 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-16 10:52:03,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:03,450 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-16 10:52:03,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:03,451 INFO L225 Difference]: With dead ends: 95 [2020-10-16 10:52:03,451 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 10:52:03,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:52:03,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 10:52:03,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-16 10:52:03,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 10:52:03,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-16 10:52:03,454 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-16 10:52:03,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:03,454 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-16 10:52:03,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 10:52:03,454 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-16 10:52:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:03,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:03,455 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:03,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-16 10:52:03,656 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:03,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:03,656 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-16 10:52:03,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:03,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169030497] [2020-10-16 10:52:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:03,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169030497] [2020-10-16 10:52:03,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512700219] [2020-10-16 10:52:03,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:03,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 10:52:03,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:03,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:03,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:03,809 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:03,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:03,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 10:52:03,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442589373] [2020-10-16 10:52:03,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:03,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:03,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:03,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:03,822 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-16 10:52:04,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:04,336 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-10-16 10:52:04,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:52:04,337 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 10:52:04,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:04,338 INFO L225 Difference]: With dead ends: 76 [2020-10-16 10:52:04,338 INFO L226 Difference]: Without dead ends: 68 [2020-10-16 10:52:04,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:52:04,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-16 10:52:04,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-16 10:52:04,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 10:52:04,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-16 10:52:04,341 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-16 10:52:04,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:04,341 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-16 10:52:04,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:04,341 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-16 10:52:04,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-16 10:52:04,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:04,342 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:04,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:04,550 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:04,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:04,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-16 10:52:04,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:04,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602711772] [2020-10-16 10:52:04,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:04,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602711772] [2020-10-16 10:52:04,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116169767] [2020-10-16 10:52:04,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:04,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 10:52:04,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:04,740 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:52:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:04,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:04,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 10:52:04,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428812507] [2020-10-16 10:52:04,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:04,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:04,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:04,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:04,754 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-16 10:52:05,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:05,207 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-16 10:52:05,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:05,207 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-16 10:52:05,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:05,208 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:52:05,208 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 10:52:05,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:52:05,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 10:52:05,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-16 10:52:05,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 10:52:05,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-16 10:52:05,211 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-16 10:52:05,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:05,211 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-16 10:52:05,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:05,211 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-16 10:52:05,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:05,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:05,211 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:05,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-16 10:52:05,412 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:05,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:05,413 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-16 10:52:05,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:05,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008916738] [2020-10-16 10:52:05,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:05,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:05,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008916738] [2020-10-16 10:52:05,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935363138] [2020-10-16 10:52:05,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:05,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:05,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:05,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:05,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:05,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:52:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:05,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:05,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:05,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803670437] [2020-10-16 10:52:05,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:05,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:05,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:05,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:05,596 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-16 10:52:06,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:06,110 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-16 10:52:06,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:06,111 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:06,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:06,112 INFO L225 Difference]: With dead ends: 72 [2020-10-16 10:52:06,112 INFO L226 Difference]: Without dead ends: 67 [2020-10-16 10:52:06,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:52:06,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-16 10:52:06,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-16 10:52:06,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-16 10:52:06,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-16 10:52:06,115 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-16 10:52:06,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:06,115 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-16 10:52:06,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:06,115 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-16 10:52:06,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:06,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:06,116 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:06,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-16 10:52:06,317 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:06,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:06,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-16 10:52:06,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:06,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736502535] [2020-10-16 10:52:06,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:06,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736502535] [2020-10-16 10:52:06,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913209483] [2020-10-16 10:52:06,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:06,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 10:52:06,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:06,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:06,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:06,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:06,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 10:52:06,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490335407] [2020-10-16 10:52:06,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:06,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:06,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:06,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:06,504 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-16 10:52:06,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:06,728 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-16 10:52:06,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 10:52:06,729 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 10:52:06,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:06,730 INFO L225 Difference]: With dead ends: 78 [2020-10-16 10:52:06,730 INFO L226 Difference]: Without dead ends: 72 [2020-10-16 10:52:06,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-10-16 10:52:06,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-16 10:52:06,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-16 10:52:06,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 10:52:06,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-16 10:52:06,732 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-16 10:52:06,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:06,733 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-16 10:52:06,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:06,733 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-16 10:52:06,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:06,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:06,734 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:06,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:06,935 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:06,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:06,935 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-16 10:52:06,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:06,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88114647] [2020-10-16 10:52:06,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:07,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88114647] [2020-10-16 10:52:07,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910968592] [2020-10-16 10:52:07,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:07,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:07,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:07,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:07,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:07,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:07,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:07,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:07,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830630841] [2020-10-16 10:52:07,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:07,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:07,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:07,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:07,142 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-16 10:52:07,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:07,404 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-16 10:52:07,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 10:52:07,405 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:07,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:07,406 INFO L225 Difference]: With dead ends: 90 [2020-10-16 10:52:07,406 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 10:52:07,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-10-16 10:52:07,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 10:52:07,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-16 10:52:07,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-16 10:52:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-16 10:52:07,409 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-16 10:52:07,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:07,409 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-16 10:52:07,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:07,410 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-16 10:52:07,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:07,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:07,410 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:07,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:07,619 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:07,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:07,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-16 10:52:07,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:07,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245633254] [2020-10-16 10:52:07,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:07,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245633254] [2020-10-16 10:52:07,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096911060] [2020-10-16 10:52:07,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:07,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 10:52:07,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:07,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:07,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:07,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:07,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 10:52:07,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2772080] [2020-10-16 10:52:07,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:07,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:07,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:07,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:07,801 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-16 10:52:08,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:08,094 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-16 10:52:08,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:52:08,095 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 10:52:08,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:08,096 INFO L225 Difference]: With dead ends: 91 [2020-10-16 10:52:08,096 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 10:52:08,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:52:08,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 10:52:08,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-16 10:52:08,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-16 10:52:08,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-16 10:52:08,099 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-16 10:52:08,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:08,099 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-16 10:52:08,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:08,099 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-16 10:52:08,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:08,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:08,099 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:08,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:08,300 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:08,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:08,301 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-16 10:52:08,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:08,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347572818] [2020-10-16 10:52:08,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:08,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347572818] [2020-10-16 10:52:08,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535779772] [2020-10-16 10:52:08,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:08,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 10:52:08,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:08,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:08,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:08,540 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:08,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:08,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:08,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641111091] [2020-10-16 10:52:08,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:08,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:08,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:08,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:08,559 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-16 10:52:09,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:09,018 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-16 10:52:09,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:52:09,019 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:09,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:09,020 INFO L225 Difference]: With dead ends: 99 [2020-10-16 10:52:09,020 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 10:52:09,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:52:09,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 10:52:09,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-16 10:52:09,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 10:52:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-16 10:52:09,022 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-16 10:52:09,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:09,023 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-16 10:52:09,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:09,023 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-16 10:52:09,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:09,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:09,024 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:09,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:09,234 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:09,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:09,235 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-16 10:52:09,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:09,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520861598] [2020-10-16 10:52:09,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:09,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520861598] [2020-10-16 10:52:09,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71856689] [2020-10-16 10:52:09,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:09,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:09,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:09,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:09,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 10:52:09,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635101446] [2020-10-16 10:52:09,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:09,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:09,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:09,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:09,464 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-16 10:52:09,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:09,783 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-16 10:52:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:52:09,783 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 10:52:09,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:09,784 INFO L225 Difference]: With dead ends: 99 [2020-10-16 10:52:09,784 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 10:52:09,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:52:09,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 10:52:09,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-16 10:52:09,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 10:52:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-16 10:52:09,787 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-16 10:52:09,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:09,788 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-16 10:52:09,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:09,788 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-16 10:52:09,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:09,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:09,788 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:09,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-16 10:52:09,990 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:09,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:09,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-16 10:52:09,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:09,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6064380] [2020-10-16 10:52:09,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:10,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6064380] [2020-10-16 10:52:10,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251311859] [2020-10-16 10:52:10,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:10,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:10,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:10,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:10,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:10,170 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:10,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:10,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:10,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104643685] [2020-10-16 10:52:10,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:10,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:10,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:10,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:10,182 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-16 10:52:10,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:10,577 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-16 10:52:10,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:52:10,577 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:10,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:10,578 INFO L225 Difference]: With dead ends: 96 [2020-10-16 10:52:10,579 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 10:52:10,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:52:10,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 10:52:10,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-16 10:52:10,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 10:52:10,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-16 10:52:10,582 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-16 10:52:10,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:10,582 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-16 10:52:10,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:10,582 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-16 10:52:10,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:10,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:10,582 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:10,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:10,783 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:10,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:10,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-16 10:52:10,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:10,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678618865] [2020-10-16 10:52:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:10,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678618865] [2020-10-16 10:52:10,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457139288] [2020-10-16 10:52:10,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:10,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 10:52:10,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:10,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:10,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:10,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:10,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 10:52:10,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263676910] [2020-10-16 10:52:10,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:10,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:10,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:10,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:10,957 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-16 10:52:11,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:11,340 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-16 10:52:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:11,340 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 10:52:11,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:11,342 INFO L225 Difference]: With dead ends: 97 [2020-10-16 10:52:11,342 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 10:52:11,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:52:11,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 10:52:11,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-16 10:52:11,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 10:52:11,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-16 10:52:11,345 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-16 10:52:11,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:11,345 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-16 10:52:11,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:11,346 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-16 10:52:11,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:11,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:11,346 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:11,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-16 10:52:11,554 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:11,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:11,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-16 10:52:11,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:11,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396621994] [2020-10-16 10:52:11,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:11,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396621994] [2020-10-16 10:52:11,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958654044] [2020-10-16 10:52:11,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:11,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:11,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:11,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:11,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:11,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:11,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:11,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:11,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226655581] [2020-10-16 10:52:11,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:11,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:11,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:11,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:11,794 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-16 10:52:12,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:12,269 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-16 10:52:12,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:52:12,270 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:12,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:12,271 INFO L225 Difference]: With dead ends: 94 [2020-10-16 10:52:12,271 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 10:52:12,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 10:52:12,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 10:52:12,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-16 10:52:12,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:52:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-16 10:52:12,277 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-16 10:52:12,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:12,277 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-16 10:52:12,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-16 10:52:12,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:12,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:12,279 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:12,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:12,488 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:12,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:12,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-16 10:52:12,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:12,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701997843] [2020-10-16 10:52:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:12,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701997843] [2020-10-16 10:52:12,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246114145] [2020-10-16 10:52:12,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:12,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 10:52:12,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:12,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:12,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:12,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:12,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 10:52:12,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863062096] [2020-10-16 10:52:12,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:12,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:12,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:12,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:12,748 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-16 10:52:13,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:13,216 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-16 10:52:13,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:52:13,217 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 10:52:13,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:13,218 INFO L225 Difference]: With dead ends: 95 [2020-10-16 10:52:13,218 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 10:52:13,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:52:13,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 10:52:13,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-16 10:52:13,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 10:52:13,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-16 10:52:13,220 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-16 10:52:13,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:13,221 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-16 10:52:13,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:13,221 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-16 10:52:13,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:13,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:13,221 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:13,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-16 10:52:13,429 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:13,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:13,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-16 10:52:13,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:13,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724239680] [2020-10-16 10:52:13,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:13,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724239680] [2020-10-16 10:52:13,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731317100] [2020-10-16 10:52:13,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:13,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 10:52:13,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:13,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:13,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:13,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:13,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:13,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:13,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769808649] [2020-10-16 10:52:13,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:13,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:13,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:13,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:13,638 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-16 10:52:14,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:14,186 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-16 10:52:14,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:52:14,187 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:14,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:14,188 INFO L225 Difference]: With dead ends: 92 [2020-10-16 10:52:14,188 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 10:52:14,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:52:14,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 10:52:14,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-16 10:52:14,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 10:52:14,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-16 10:52:14,191 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-16 10:52:14,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:14,191 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-16 10:52:14,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:14,191 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-16 10:52:14,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:14,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:14,192 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:14,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:14,400 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:14,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:14,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-16 10:52:14,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:14,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386066502] [2020-10-16 10:52:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:14,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386066502] [2020-10-16 10:52:14,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39079947] [2020-10-16 10:52:14,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:14,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:14,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:14,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:14,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-16 10:52:14,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519855617] [2020-10-16 10:52:14,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 10:52:14,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:14,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 10:52:14,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-16 10:52:14,586 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-16 10:52:15,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:15,038 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-16 10:52:15,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:52:15,039 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-16 10:52:15,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:15,040 INFO L225 Difference]: With dead ends: 112 [2020-10-16 10:52:15,040 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 10:52:15,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 10:52:15,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 10:52:15,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-16 10:52:15,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 10:52:15,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-16 10:52:15,044 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-16 10:52:15,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:15,044 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-16 10:52:15,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 10:52:15,044 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-16 10:52:15,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 10:52:15,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:15,045 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:15,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:15,254 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:15,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:15,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-16 10:52:15,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:15,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285936345] [2020-10-16 10:52:15,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:15,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285936345] [2020-10-16 10:52:15,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238490061] [2020-10-16 10:52:15,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:15,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:15,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:15,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 10:52:15,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:15,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:15,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:15,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 10:52:15,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184979280] [2020-10-16 10:52:15,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:15,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:15,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:15,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:15,516 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-16 10:52:16,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:16,138 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-16 10:52:16,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:52:16,138 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-16 10:52:16,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:16,139 INFO L225 Difference]: With dead ends: 93 [2020-10-16 10:52:16,139 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 10:52:16,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 10:52:16,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 10:52:16,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-16 10:52:16,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 10:52:16,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-16 10:52:16,142 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-16 10:52:16,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:16,142 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-16 10:52:16,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:16,142 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-16 10:52:16,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:16,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:16,143 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:16,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:16,349 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:16,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:16,350 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-16 10:52:16,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:16,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034572204] [2020-10-16 10:52:16,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:16,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:16,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:16,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034572204] [2020-10-16 10:52:16,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311040788] [2020-10-16 10:52:16,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:16,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 10:52:16,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:16,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:16,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:16,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:16,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 10:52:16,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947001848] [2020-10-16 10:52:16,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:16,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:16,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:16,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:16,591 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-16 10:52:16,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:16,852 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-16 10:52:16,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:52:16,852 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 10:52:16,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:16,853 INFO L225 Difference]: With dead ends: 104 [2020-10-16 10:52:16,853 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 10:52:16,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-16 10:52:16,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 10:52:16,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-16 10:52:16,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:52:16,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 10:52:16,856 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 10:52:16,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:16,856 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 10:52:16,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:16,856 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 10:52:16,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:16,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:16,857 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:17,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:17,057 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:17,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:17,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-16 10:52:17,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:17,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094518793] [2020-10-16 10:52:17,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:17,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094518793] [2020-10-16 10:52:17,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994177204] [2020-10-16 10:52:17,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:17,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:17,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:17,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:17,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:17,269 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:17,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:17,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:17,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867596362] [2020-10-16 10:52:17,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:17,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:17,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:17,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:17,288 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 10:52:17,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:17,642 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-16 10:52:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:52:17,643 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:17,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:17,644 INFO L225 Difference]: With dead ends: 101 [2020-10-16 10:52:17,644 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 10:52:17,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:52:17,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 10:52:17,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-16 10:52:17,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:52:17,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 10:52:17,647 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 10:52:17,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:17,648 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 10:52:17,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:17,648 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 10:52:17,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:17,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:17,648 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:17,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:17,858 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:17,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:17,858 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-16 10:52:17,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:17,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128816619] [2020-10-16 10:52:17,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:18,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128816619] [2020-10-16 10:52:18,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466097081] [2020-10-16 10:52:18,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:18,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 10:52:18,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:18,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:18,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:18,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:18,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 10:52:18,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796296766] [2020-10-16 10:52:18,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:18,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:18,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:18,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:18,086 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 10:52:18,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:18,392 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-16 10:52:18,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:52:18,393 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 10:52:18,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:18,394 INFO L225 Difference]: With dead ends: 98 [2020-10-16 10:52:18,394 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 10:52:18,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-16 10:52:18,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 10:52:18,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-16 10:52:18,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:52:18,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 10:52:18,396 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 10:52:18,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:18,397 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 10:52:18,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:18,397 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 10:52:18,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:18,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:18,397 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:18,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:18,605 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:18,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:18,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-16 10:52:18,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:18,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942635448] [2020-10-16 10:52:18,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:18,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942635448] [2020-10-16 10:52:18,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987223267] [2020-10-16 10:52:18,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:18,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 10:52:18,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:18,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:18,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:18,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:18,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:18,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:18,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336149810] [2020-10-16 10:52:18,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:18,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:18,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:18,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:18,865 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 10:52:19,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:19,278 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-16 10:52:19,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:52:19,278 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:19,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:19,279 INFO L225 Difference]: With dead ends: 97 [2020-10-16 10:52:19,279 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 10:52:19,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:52:19,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 10:52:19,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-16 10:52:19,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:52:19,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 10:52:19,283 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 10:52:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:19,283 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 10:52:19,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:19,283 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 10:52:19,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:19,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:19,284 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:19,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:19,492 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:19,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:19,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-16 10:52:19,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:19,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963957205] [2020-10-16 10:52:19,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:19,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963957205] [2020-10-16 10:52:19,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511582971] [2020-10-16 10:52:19,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:19,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:19,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:19,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:19,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:19,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 10:52:19,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385949092] [2020-10-16 10:52:19,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:19,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:19,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:19,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:19,681 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 10:52:20,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:20,049 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-16 10:52:20,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:52:20,050 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 10:52:20,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:20,050 INFO L225 Difference]: With dead ends: 94 [2020-10-16 10:52:20,051 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 10:52:20,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:52:20,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 10:52:20,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-16 10:52:20,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:52:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 10:52:20,053 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 10:52:20,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:20,053 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 10:52:20,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:20,053 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 10:52:20,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:20,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:20,054 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:20,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-16 10:52:20,254 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:20,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:20,255 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-16 10:52:20,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:20,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046415574] [2020-10-16 10:52:20,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:20,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046415574] [2020-10-16 10:52:20,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038782151] [2020-10-16 10:52:20,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:20,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:20,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:20,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:20,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:20,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:20,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:20,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:20,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980460103] [2020-10-16 10:52:20,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:20,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:20,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:20,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:20,485 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 10:52:20,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:20,972 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-16 10:52:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:52:20,973 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:20,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:20,974 INFO L225 Difference]: With dead ends: 93 [2020-10-16 10:52:20,974 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 10:52:20,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:52:20,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 10:52:20,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-16 10:52:20,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:52:20,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 10:52:20,977 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 10:52:20,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:20,977 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 10:52:20,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:20,977 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 10:52:20,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:20,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:20,978 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:21,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:21,179 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:21,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:21,179 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-16 10:52:21,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:21,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805168761] [2020-10-16 10:52:21,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:21,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805168761] [2020-10-16 10:52:21,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754257198] [2020-10-16 10:52:21,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:21,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 10:52:21,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:21,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:21,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:21,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:21,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 10:52:21,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093861950] [2020-10-16 10:52:21,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:21,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:21,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:21,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:21,362 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 10:52:21,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:21,769 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-16 10:52:21,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:21,769 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 10:52:21,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:21,770 INFO L225 Difference]: With dead ends: 90 [2020-10-16 10:52:21,770 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 10:52:21,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 10:52:21,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 10:52:21,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-16 10:52:21,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:52:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 10:52:21,773 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 10:52:21,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:21,773 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 10:52:21,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:21,773 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 10:52:21,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:21,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:21,774 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:21,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-16 10:52:21,975 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:21,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:21,975 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-16 10:52:21,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:21,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56301297] [2020-10-16 10:52:21,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:22,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56301297] [2020-10-16 10:52:22,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443307931] [2020-10-16 10:52:22,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:22,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:22,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:22,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:22,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:22,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:22,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:22,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:22,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600291230] [2020-10-16 10:52:22,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:22,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:22,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:22,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:22,182 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 10:52:22,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:22,763 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-16 10:52:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:52:22,763 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:22,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:22,764 INFO L225 Difference]: With dead ends: 89 [2020-10-16 10:52:22,764 INFO L226 Difference]: Without dead ends: 83 [2020-10-16 10:52:22,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 10:52:22,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-16 10:52:22,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-16 10:52:22,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:52:22,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 10:52:22,768 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 10:52:22,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:22,768 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 10:52:22,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 10:52:22,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:22,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:22,769 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:22,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:22,978 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:22,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:22,978 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-16 10:52:22,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:22,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468213712] [2020-10-16 10:52:22,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:23,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468213712] [2020-10-16 10:52:23,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803180800] [2020-10-16 10:52:23,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:23,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 10:52:23,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:23,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:23,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:23,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:23,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 10:52:23,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013784690] [2020-10-16 10:52:23,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:23,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:23,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:23,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:23,170 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 10:52:23,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:23,627 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-16 10:52:23,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:52:23,628 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 10:52:23,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:23,629 INFO L225 Difference]: With dead ends: 86 [2020-10-16 10:52:23,629 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 10:52:23,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:52:23,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 10:52:23,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-16 10:52:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:52:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 10:52:23,632 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-16 10:52:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:23,632 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 10:52:23,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 10:52:23,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:23,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:23,633 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:23,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:23,843 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:23,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:23,843 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-16 10:52:23,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:23,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368798456] [2020-10-16 10:52:23,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:23,965 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:23,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368798456] [2020-10-16 10:52:23,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587860850] [2020-10-16 10:52:23,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:24,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 10:52:24,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:24,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:24,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:24,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:24,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:24,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:24,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773874739] [2020-10-16 10:52:24,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:24,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:24,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:24,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:24,045 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-16 10:52:24,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:24,693 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-16 10:52:24,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:52:24,694 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:24,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:24,695 INFO L225 Difference]: With dead ends: 85 [2020-10-16 10:52:24,695 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 10:52:24,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:52:24,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 10:52:24,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-16 10:52:24,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:52:24,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 10:52:24,698 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-16 10:52:24,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:24,698 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 10:52:24,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:24,698 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 10:52:24,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:24,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:24,699 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:24,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:24,900 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:24,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:24,900 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-16 10:52:24,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:24,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182850216] [2020-10-16 10:52:24,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:25,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182850216] [2020-10-16 10:52:25,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047057129] [2020-10-16 10:52:25,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:25,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:25,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:25,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:25,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-16 10:52:25,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952810124] [2020-10-16 10:52:25,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-16 10:52:25,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:25,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-16 10:52:25,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-16 10:52:25,087 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-16 10:52:25,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:25,626 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-16 10:52:25,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:52:25,627 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-16 10:52:25,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:25,628 INFO L225 Difference]: With dead ends: 101 [2020-10-16 10:52:25,628 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 10:52:25,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 10:52:25,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 10:52:25,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-16 10:52:25,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 10:52:25,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-16 10:52:25,631 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-16 10:52:25,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:25,631 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-16 10:52:25,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-16 10:52:25,631 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-16 10:52:25,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:25,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:25,632 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:25,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:25,832 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:25,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:25,833 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-16 10:52:25,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:25,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473451583] [2020-10-16 10:52:25,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:25,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473451583] [2020-10-16 10:52:25,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499348324] [2020-10-16 10:52:25,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:26,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:26,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:26,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:26,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:26,025 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:26,037 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:26,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:26,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:26,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027268357] [2020-10-16 10:52:26,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:26,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:26,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:26,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:26,039 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-16 10:52:26,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:26,737 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-10-16 10:52:26,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:52:26,738 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:26,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:26,739 INFO L225 Difference]: With dead ends: 82 [2020-10-16 10:52:26,739 INFO L226 Difference]: Without dead ends: 74 [2020-10-16 10:52:26,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:52:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-16 10:52:26,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-10-16 10:52:26,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-16 10:52:26,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-16 10:52:26,742 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-16 10:52:26,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:26,742 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-16 10:52:26,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:26,743 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-16 10:52:26,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-16 10:52:26,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:26,743 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:26,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:26,951 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:26,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:26,952 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-16 10:52:26,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:26,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358207581] [2020-10-16 10:52:26,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:26,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:27,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358207581] [2020-10-16 10:52:27,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944697030] [2020-10-16 10:52:27,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:27,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 10:52:27,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:27,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 10:52:27,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:27,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:52:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:27,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:27,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-16 10:52:27,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004067436] [2020-10-16 10:52:27,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:27,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:27,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:27,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:27,154 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-16 10:52:27,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:27,763 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-16 10:52:27,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:52:27,764 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-16 10:52:27,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:27,764 INFO L225 Difference]: With dead ends: 92 [2020-10-16 10:52:27,765 INFO L226 Difference]: Without dead ends: 87 [2020-10-16 10:52:27,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:52:27,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-16 10:52:27,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-16 10:52:27,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 10:52:27,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-16 10:52:27,768 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-16 10:52:27,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:27,768 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-16 10:52:27,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:27,768 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-16 10:52:27,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:27,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:27,769 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:27,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:27,970 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:27,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:27,970 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-16 10:52:27,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:27,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475670280] [2020-10-16 10:52:27,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:28,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475670280] [2020-10-16 10:52:28,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581477761] [2020-10-16 10:52:28,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:28,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:28,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:28,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:28,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:28,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:52:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:28,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:28,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:28,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769308895] [2020-10-16 10:52:28,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:28,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:28,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:28,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:28,171 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-16 10:52:28,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:28,833 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-16 10:52:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:52:28,834 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:28,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:28,835 INFO L225 Difference]: With dead ends: 78 [2020-10-16 10:52:28,835 INFO L226 Difference]: Without dead ends: 73 [2020-10-16 10:52:28,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:52:28,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-16 10:52:28,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-16 10:52:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-16 10:52:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-16 10:52:28,838 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-16 10:52:28,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:28,838 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-16 10:52:28,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-16 10:52:28,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:28,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:28,839 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:29,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-16 10:52:29,046 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:29,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:29,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-16 10:52:29,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:29,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83773943] [2020-10-16 10:52:29,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:29,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83773943] [2020-10-16 10:52:29,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677390919] [2020-10-16 10:52:29,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:29,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 10:52:29,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:29,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:29,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:29,265 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:29,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:29,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:29,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175765647] [2020-10-16 10:52:29,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:29,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:29,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:29,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:29,267 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-16 10:52:29,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:29,550 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-16 10:52:29,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-16 10:52:29,551 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:29,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:29,551 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:52:29,552 INFO L226 Difference]: Without dead ends: 78 [2020-10-16 10:52:29,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-16 10:52:29,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-16 10:52:29,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-16 10:52:29,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:52:29,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-16 10:52:29,554 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-16 10:52:29,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:29,554 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-16 10:52:29,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:29,554 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-16 10:52:29,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:29,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:29,554 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:29,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:29,755 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:29,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:29,756 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-16 10:52:29,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:29,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464635152] [2020-10-16 10:52:29,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:29,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464635152] [2020-10-16 10:52:29,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040596669] [2020-10-16 10:52:29,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:29,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 10:52:29,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:29,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:29,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:29,990 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:29,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:29,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:29,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258291380] [2020-10-16 10:52:29,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:29,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:29,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:29,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:29,998 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-16 10:52:30,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:30,300 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-16 10:52:30,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 10:52:30,300 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:30,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:30,301 INFO L225 Difference]: With dead ends: 98 [2020-10-16 10:52:30,301 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 10:52:30,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-10-16 10:52:30,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 10:52:30,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-16 10:52:30,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-16 10:52:30,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-16 10:52:30,304 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-16 10:52:30,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:30,304 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-16 10:52:30,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:30,304 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-16 10:52:30,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:30,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:30,305 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:30,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-16 10:52:30,506 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:30,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:30,506 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-16 10:52:30,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:30,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965031106] [2020-10-16 10:52:30,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:30,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965031106] [2020-10-16 10:52:30,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784941060] [2020-10-16 10:52:30,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:30,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:30,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:30,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:30,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:30,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021580334] [2020-10-16 10:52:30,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:30,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:30,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:30,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:30,731 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-16 10:52:31,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:31,134 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-16 10:52:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:52:31,135 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:31,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:31,136 INFO L225 Difference]: With dead ends: 99 [2020-10-16 10:52:31,136 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 10:52:31,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:52:31,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 10:52:31,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-16 10:52:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-16 10:52:31,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-16 10:52:31,140 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-16 10:52:31,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:31,140 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-16 10:52:31,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:31,141 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-16 10:52:31,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:31,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:31,141 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:31,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:31,342 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:31,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:31,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-16 10:52:31,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:31,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065696486] [2020-10-16 10:52:31,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:31,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065696486] [2020-10-16 10:52:31,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453710500] [2020-10-16 10:52:31,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:31,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:31,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:31,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:31,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:31,591 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:31,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:31,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:31,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978896929] [2020-10-16 10:52:31,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:31,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:31,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:31,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:31,603 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-16 10:52:32,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:32,011 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-16 10:52:32,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:52:32,012 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:32,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:32,013 INFO L225 Difference]: With dead ends: 109 [2020-10-16 10:52:32,013 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 10:52:32,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 10:52:32,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 10:52:32,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-16 10:52:32,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:52:32,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-16 10:52:32,015 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-16 10:52:32,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:32,016 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-16 10:52:32,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:32,016 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-16 10:52:32,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:32,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:32,017 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:32,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:32,226 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:32,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:32,226 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-16 10:52:32,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:32,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465889217] [2020-10-16 10:52:32,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:32,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465889217] [2020-10-16 10:52:32,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765671447] [2020-10-16 10:52:32,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:32,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 10:52:32,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:32,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:32,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:32,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:32,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:32,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82332387] [2020-10-16 10:52:32,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:32,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:32,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:32,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:32,450 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-16 10:52:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:32,856 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-16 10:52:32,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:32,857 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:32,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:32,858 INFO L225 Difference]: With dead ends: 109 [2020-10-16 10:52:32,858 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 10:52:32,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:52:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 10:52:32,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-16 10:52:32,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 10:52:32,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-16 10:52:32,862 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-16 10:52:32,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:32,862 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-16 10:52:32,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:32,862 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-16 10:52:32,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:32,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:32,862 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:33,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-16 10:52:33,068 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:33,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:33,068 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-16 10:52:33,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:33,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333265143] [2020-10-16 10:52:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:33,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333265143] [2020-10-16 10:52:33,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380945577] [2020-10-16 10:52:33,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:33,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:33,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:33,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:33,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:33,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:33,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:33,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:33,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560407400] [2020-10-16 10:52:33,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:33,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:33,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:33,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:33,304 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-16 10:52:33,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:33,788 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-16 10:52:33,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:52:33,788 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:33,789 INFO L225 Difference]: With dead ends: 106 [2020-10-16 10:52:33,790 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 10:52:33,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:52:33,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 10:52:33,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-16 10:52:33,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 10:52:33,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-16 10:52:33,792 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-16 10:52:33,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:33,793 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-16 10:52:33,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:33,793 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-16 10:52:33,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:33,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:33,793 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:34,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-16 10:52:34,001 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:34,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:34,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-16 10:52:34,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:34,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948087107] [2020-10-16 10:52:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:34,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948087107] [2020-10-16 10:52:34,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226490554] [2020-10-16 10:52:34,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:34,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 10:52:34,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:34,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:34,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:34,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:34,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:34,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941848537] [2020-10-16 10:52:34,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:34,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:34,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:34,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:34,216 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-16 10:52:34,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:34,645 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-16 10:52:34,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:52:34,646 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:34,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:34,646 INFO L225 Difference]: With dead ends: 107 [2020-10-16 10:52:34,646 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 10:52:34,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 10:52:34,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 10:52:34,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-16 10:52:34,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 10:52:34,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-16 10:52:34,649 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-16 10:52:34,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:34,649 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-16 10:52:34,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:34,650 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-16 10:52:34,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:34,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:34,650 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:34,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:34,852 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:34,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:34,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-16 10:52:34,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:34,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292812895] [2020-10-16 10:52:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:35,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292812895] [2020-10-16 10:52:35,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473909122] [2020-10-16 10:52:35,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:35,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 10:52:35,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:35,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:35,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:35,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:35,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:35,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:35,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551198854] [2020-10-16 10:52:35,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:35,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:35,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:35,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:35,084 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-16 10:52:35,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:35,632 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-16 10:52:35,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:52:35,632 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:35,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:35,633 INFO L225 Difference]: With dead ends: 104 [2020-10-16 10:52:35,633 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 10:52:35,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 10:52:35,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 10:52:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-16 10:52:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 10:52:35,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-16 10:52:35,641 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-16 10:52:35,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:35,641 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-16 10:52:35,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:35,641 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-16 10:52:35,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:35,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:35,642 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:35,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-16 10:52:35,846 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:35,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:35,846 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-16 10:52:35,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:35,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41808629] [2020-10-16 10:52:35,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:35,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41808629] [2020-10-16 10:52:35,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420605783] [2020-10-16 10:52:35,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:36,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:36,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:36,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:36,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:36,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721167801] [2020-10-16 10:52:36,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:36,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:36,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:36,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:36,049 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-16 10:52:36,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:36,544 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-16 10:52:36,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:52:36,544 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:36,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:36,545 INFO L225 Difference]: With dead ends: 105 [2020-10-16 10:52:36,545 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 10:52:36,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:52:36,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 10:52:36,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-16 10:52:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:52:36,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-16 10:52:36,548 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-16 10:52:36,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:36,548 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-16 10:52:36,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:36,549 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-16 10:52:36,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:36,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:36,549 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:36,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:36,753 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:36,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:36,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-16 10:52:36,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:36,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096536939] [2020-10-16 10:52:36,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:36,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096536939] [2020-10-16 10:52:36,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267177983] [2020-10-16 10:52:36,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:36,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:36,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:36,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:36,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:36,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:36,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:36,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:36,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35526415] [2020-10-16 10:52:36,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:36,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:36,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:36,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:36,968 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-16 10:52:37,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:37,616 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-16 10:52:37,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:52:37,617 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:37,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:37,618 INFO L225 Difference]: With dead ends: 102 [2020-10-16 10:52:37,618 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 10:52:37,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 10:52:37,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 10:52:37,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-16 10:52:37,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:52:37,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-16 10:52:37,620 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-16 10:52:37,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:37,620 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-16 10:52:37,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:37,621 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-16 10:52:37,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:37,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:37,621 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:37,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-16 10:52:37,822 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:37,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:37,822 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-16 10:52:37,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:37,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414579112] [2020-10-16 10:52:37,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:37,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414579112] [2020-10-16 10:52:37,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200722532] [2020-10-16 10:52:37,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:38,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 10:52:38,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:38,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:38,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:38,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:38,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:38,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337511202] [2020-10-16 10:52:38,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:38,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:38,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:38,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:38,028 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-16 10:52:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:38,570 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-16 10:52:38,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:52:38,571 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:38,572 INFO L225 Difference]: With dead ends: 103 [2020-10-16 10:52:38,572 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 10:52:38,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:52:38,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 10:52:38,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-16 10:52:38,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 10:52:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-16 10:52:38,574 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-16 10:52:38,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:38,574 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-16 10:52:38,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:38,575 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-16 10:52:38,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:38,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:38,575 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:38,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:38,782 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:38,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:38,782 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-16 10:52:38,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:38,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111805643] [2020-10-16 10:52:38,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:38,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111805643] [2020-10-16 10:52:38,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224544900] [2020-10-16 10:52:38,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:38,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:38,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:38,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:38,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:38,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:38,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:38,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:38,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028531424] [2020-10-16 10:52:38,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:38,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:38,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:38,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:38,985 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-16 10:52:39,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:39,674 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-16 10:52:39,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:52:39,674 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:39,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:39,675 INFO L225 Difference]: With dead ends: 100 [2020-10-16 10:52:39,675 INFO L226 Difference]: Without dead ends: 94 [2020-10-16 10:52:39,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:52:39,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-16 10:52:39,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-16 10:52:39,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 10:52:39,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-16 10:52:39,678 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-16 10:52:39,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:39,679 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-16 10:52:39,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:39,679 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-16 10:52:39,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:39,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:39,679 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:39,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-16 10:52:39,882 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:39,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:39,883 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-16 10:52:39,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:39,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156562594] [2020-10-16 10:52:39,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:40,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156562594] [2020-10-16 10:52:40,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613361464] [2020-10-16 10:52:40,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:40,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 10:52:40,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:40,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:40,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:40,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:40,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-16 10:52:40,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876799274] [2020-10-16 10:52:40,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 10:52:40,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:40,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 10:52:40,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-16 10:52:40,148 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-16 10:52:40,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:40,797 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-16 10:52:40,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:52:40,798 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-16 10:52:40,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:40,799 INFO L225 Difference]: With dead ends: 120 [2020-10-16 10:52:40,799 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 10:52:40,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:52:40,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 10:52:40,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-16 10:52:40,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 10:52:40,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-16 10:52:40,801 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-16 10:52:40,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:40,802 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-16 10:52:40,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 10:52:40,803 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-16 10:52:40,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 10:52:40,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:40,804 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:41,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-16 10:52:41,011 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:41,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:41,012 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-16 10:52:41,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:41,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328745147] [2020-10-16 10:52:41,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:41,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328745147] [2020-10-16 10:52:41,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728033190] [2020-10-16 10:52:41,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:41,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 10:52:41,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:41,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-16 10:52:41,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:41,309 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:41,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:41,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-16 10:52:41,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474141639] [2020-10-16 10:52:41,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:41,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:41,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:41,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:41,330 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-16 10:52:42,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:42,222 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-16 10:52:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:52:42,222 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-16 10:52:42,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:42,223 INFO L225 Difference]: With dead ends: 101 [2020-10-16 10:52:42,223 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 10:52:42,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:52:42,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 10:52:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-16 10:52:42,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 10:52:42,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-16 10:52:42,225 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-16 10:52:42,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:42,226 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-16 10:52:42,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-16 10:52:42,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:42,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:42,226 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:42,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:42,435 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:42,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:42,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-16 10:52:42,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:42,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418819846] [2020-10-16 10:52:42,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:42,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418819846] [2020-10-16 10:52:42,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666581225] [2020-10-16 10:52:42,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:42,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:42,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:42,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:42,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:42,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619055249] [2020-10-16 10:52:42,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:42,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:42,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:42,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:42,684 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-16 10:52:43,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:43,013 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-16 10:52:43,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:52:43,013 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:52:43,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:43,014 INFO L225 Difference]: With dead ends: 114 [2020-10-16 10:52:43,014 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 10:52:43,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-10-16 10:52:43,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 10:52:43,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-16 10:52:43,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:52:43,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:52:43,017 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 10:52:43,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:43,018 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:52:43,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:52:43,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:43,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:43,019 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:43,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:43,224 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:43,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:43,224 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-16 10:52:43,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:43,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683214144] [2020-10-16 10:52:43,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:43,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683214144] [2020-10-16 10:52:43,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307901342] [2020-10-16 10:52:43,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:43,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:43,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:43,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:43,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:43,497 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:43,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:43,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:43,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144904038] [2020-10-16 10:52:43,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:43,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:43,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:43,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:43,509 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 10:52:43,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:43,934 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-16 10:52:43,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:52:43,935 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:43,935 INFO L225 Difference]: With dead ends: 111 [2020-10-16 10:52:43,936 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 10:52:43,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:52:43,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 10:52:43,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-16 10:52:43,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:52:43,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:52:43,938 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 10:52:43,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:43,938 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:52:43,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:43,939 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:52:43,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:43,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:43,939 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:44,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-16 10:52:44,142 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:44,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:44,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-16 10:52:44,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:44,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243660769] [2020-10-16 10:52:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:44,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243660769] [2020-10-16 10:52:44,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389047047] [2020-10-16 10:52:44,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:44,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 10:52:44,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:44,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:44,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:44,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:44,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:44,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88363130] [2020-10-16 10:52:44,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:44,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:44,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:44,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:44,385 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 10:52:44,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:44,777 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-16 10:52:44,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:52:44,778 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:52:44,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:44,779 INFO L225 Difference]: With dead ends: 108 [2020-10-16 10:52:44,779 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 10:52:44,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 10:52:44,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 10:52:44,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-16 10:52:44,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:52:44,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:52:44,781 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 10:52:44,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:44,782 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:52:44,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:44,782 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:52:44,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:44,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:44,782 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:44,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:44,988 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:44,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:44,988 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-16 10:52:44,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:44,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684068629] [2020-10-16 10:52:44,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:45,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684068629] [2020-10-16 10:52:45,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788750266] [2020-10-16 10:52:45,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:45,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:45,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:45,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:45,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:45,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:45,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:45,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:45,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091252544] [2020-10-16 10:52:45,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:45,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:45,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:45,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:45,251 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 10:52:45,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:45,754 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-16 10:52:45,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:52:45,755 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:45,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:45,755 INFO L225 Difference]: With dead ends: 107 [2020-10-16 10:52:45,756 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 10:52:45,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 10:52:45,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 10:52:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-16 10:52:45,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:52:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:52:45,758 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 10:52:45,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:45,759 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:52:45,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:45,759 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:52:45,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:45,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:45,760 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:45,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-16 10:52:45,967 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:45,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:45,967 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-16 10:52:45,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:45,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754184542] [2020-10-16 10:52:45,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:46,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754184542] [2020-10-16 10:52:46,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591032579] [2020-10-16 10:52:46,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:46,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 10:52:46,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:46,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:46,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:46,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:46,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:46,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654045882] [2020-10-16 10:52:46,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:46,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:46,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:46,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:46,204 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 10:52:46,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:46,648 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-16 10:52:46,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:52:46,648 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:52:46,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:46,649 INFO L225 Difference]: With dead ends: 104 [2020-10-16 10:52:46,649 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 10:52:46,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:52:46,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 10:52:46,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-16 10:52:46,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:52:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:52:46,652 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 10:52:46,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:46,652 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:52:46,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:46,652 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:52:46,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:46,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:46,653 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:46,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-16 10:52:46,860 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:46,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:46,860 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-16 10:52:46,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:46,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882845867] [2020-10-16 10:52:46,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:47,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882845867] [2020-10-16 10:52:47,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130869695] [2020-10-16 10:52:47,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:47,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 10:52:47,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:47,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:47,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:47,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:47,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:47,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:47,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508197782] [2020-10-16 10:52:47,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:47,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:47,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:47,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:47,117 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 10:52:47,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:47,690 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-16 10:52:47,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:52:47,691 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:47,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:47,691 INFO L225 Difference]: With dead ends: 103 [2020-10-16 10:52:47,691 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 10:52:47,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:52:47,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 10:52:47,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-16 10:52:47,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:52:47,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:52:47,695 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 10:52:47,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:47,695 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:52:47,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:47,695 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:52:47,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:47,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:47,696 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:47,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-16 10:52:47,901 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:47,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:47,901 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-16 10:52:47,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:47,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230543642] [2020-10-16 10:52:47,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:48,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230543642] [2020-10-16 10:52:48,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719279201] [2020-10-16 10:52:48,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:48,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:48,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:48,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:48,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:48,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951083229] [2020-10-16 10:52:48,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:48,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:48,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:48,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:48,120 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 10:52:48,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:48,621 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-16 10:52:48,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:52:48,622 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:52:48,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:48,623 INFO L225 Difference]: With dead ends: 100 [2020-10-16 10:52:48,623 INFO L226 Difference]: Without dead ends: 94 [2020-10-16 10:52:48,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 10:52:48,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-16 10:52:48,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-16 10:52:48,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:52:48,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:52:48,625 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 10:52:48,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:48,625 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:52:48,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:48,625 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:52:48,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:48,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:48,626 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:48,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:48,826 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:48,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:48,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-16 10:52:48,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:48,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276236845] [2020-10-16 10:52:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:48,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276236845] [2020-10-16 10:52:48,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320754210] [2020-10-16 10:52:48,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:49,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:49,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:49,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:49,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:49,058 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:49,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:49,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:49,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915699746] [2020-10-16 10:52:49,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:49,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:49,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:49,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:49,072 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 10:52:49,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:49,748 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-16 10:52:49,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:52:49,749 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:49,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:49,749 INFO L225 Difference]: With dead ends: 99 [2020-10-16 10:52:49,749 INFO L226 Difference]: Without dead ends: 93 [2020-10-16 10:52:49,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:52:49,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-16 10:52:49,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-16 10:52:49,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:52:49,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:52:49,752 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 10:52:49,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:49,752 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:52:49,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:49,752 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:52:49,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:49,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:49,753 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:49,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-16 10:52:49,962 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:49,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:49,962 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-16 10:52:49,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:49,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603227262] [2020-10-16 10:52:49,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:50,117 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:50,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603227262] [2020-10-16 10:52:50,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268540207] [2020-10-16 10:52:50,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:50,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 10:52:50,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:50,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:50,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:50,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:50,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:50,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292520464] [2020-10-16 10:52:50,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:50,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:50,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:50,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:50,180 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 10:52:50,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:50,730 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-16 10:52:50,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:52:50,730 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:52:50,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:50,731 INFO L225 Difference]: With dead ends: 96 [2020-10-16 10:52:50,731 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 10:52:50,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 10:52:50,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 10:52:50,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-16 10:52:50,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:52:50,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:52:50,734 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 10:52:50,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:50,734 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:52:50,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:50,735 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:52:50,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:50,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:50,735 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:50,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:50,940 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:50,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:50,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-16 10:52:50,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:50,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280023724] [2020-10-16 10:52:50,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:51,095 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:51,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280023724] [2020-10-16 10:52:51,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172454832] [2020-10-16 10:52:51,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:51,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:51,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:51,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:51,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:51,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:51,184 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:51,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:51,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:51,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585335809] [2020-10-16 10:52:51,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:51,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:51,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:51,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:51,185 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 10:52:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:51,919 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-16 10:52:51,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:52:51,920 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:51,920 INFO L225 Difference]: With dead ends: 95 [2020-10-16 10:52:51,920 INFO L226 Difference]: Without dead ends: 89 [2020-10-16 10:52:51,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:52:51,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-16 10:52:51,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-16 10:52:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:52:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:52:51,923 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 10:52:51,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:51,923 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:52:51,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:52:51,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:51,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:51,926 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:52,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:52,127 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:52,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:52,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-16 10:52:52,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:52,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040249622] [2020-10-16 10:52:52,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:52,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040249622] [2020-10-16 10:52:52,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608787032] [2020-10-16 10:52:52,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:52,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 10:52:52,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:52,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:52,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:52,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:52,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:52,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844754504] [2020-10-16 10:52:52,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:52,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:52,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:52,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:52,404 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 10:52:53,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:53,067 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-16 10:52:53,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:52:53,068 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:52:53,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:53,069 INFO L225 Difference]: With dead ends: 92 [2020-10-16 10:52:53,069 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 10:52:53,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:52:53,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 10:52:53,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-16 10:52:53,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:52:53,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:52:53,072 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-16 10:52:53,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:53,072 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:52:53,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:53,072 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:52:53,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:53,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:53,072 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:53,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:53,281 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:53,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:53,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-16 10:52:53,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:53,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004304078] [2020-10-16 10:52:53,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:53,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004304078] [2020-10-16 10:52:53,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265811927] [2020-10-16 10:52:53,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:53,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 10:52:53,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:53,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:53,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:53,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:53,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:53,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:53,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333040692] [2020-10-16 10:52:53,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:53,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:53,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:53,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:53,515 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-16 10:52:54,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:54,357 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-16 10:52:54,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:52:54,358 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:54,359 INFO L225 Difference]: With dead ends: 91 [2020-10-16 10:52:54,359 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 10:52:54,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 10:52:54,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 10:52:54,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-16 10:52:54,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:52:54,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:52:54,363 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-16 10:52:54,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:54,363 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:52:54,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:54,363 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:52:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:54,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:54,364 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:54,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:52:54,574 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:54,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:54,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-16 10:52:54,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:54,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854255458] [2020-10-16 10:52:54,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:54,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:54,769 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:54,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854255458] [2020-10-16 10:52:54,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100608486] [2020-10-16 10:52:54,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:54,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:54,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:54,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:54,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-16 10:52:54,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464089686] [2020-10-16 10:52:54,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 10:52:54,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:54,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 10:52:54,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-16 10:52:54,836 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-16 10:52:55,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:55,488 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-16 10:52:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:52:55,489 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-16 10:52:55,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:55,489 INFO L225 Difference]: With dead ends: 107 [2020-10-16 10:52:55,489 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 10:52:55,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:52:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 10:52:55,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-16 10:52:55,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 10:52:55,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-16 10:52:55,492 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-16 10:52:55,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:55,492 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-16 10:52:55,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 10:52:55,493 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-16 10:52:55,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:55,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:55,493 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:55,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-16 10:52:55,694 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:55,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:55,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-16 10:52:55,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:55,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226166028] [2020-10-16 10:52:55,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:55,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226166028] [2020-10-16 10:52:55,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454916863] [2020-10-16 10:52:55,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:55,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:52:55,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:55,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:55,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:55,909 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:52:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:55,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:55,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:55,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661462198] [2020-10-16 10:52:55,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:55,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:55,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:55,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:55,923 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-16 10:52:56,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:56,760 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-16 10:52:56,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:52:56,760 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:56,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:56,761 INFO L225 Difference]: With dead ends: 88 [2020-10-16 10:52:56,761 INFO L226 Difference]: Without dead ends: 80 [2020-10-16 10:52:56,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:52:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-16 10:52:56,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-16 10:52:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-16 10:52:56,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-16 10:52:56,763 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-16 10:52:56,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:56,763 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-16 10:52:56,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:56,764 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-16 10:52:56,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-16 10:52:56,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:56,764 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:56,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-16 10:52:56,965 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:56,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:56,965 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-16 10:52:56,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:56,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996451195] [2020-10-16 10:52:56,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:57,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996451195] [2020-10-16 10:52:57,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774765482] [2020-10-16 10:52:57,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:57,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 10:52:57,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:57,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 10:52:57,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:57,181 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:52:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:57,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:57,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 10:52:57,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946768275] [2020-10-16 10:52:57,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:57,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:57,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:57,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:57,199 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-16 10:52:57,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:57,979 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-16 10:52:57,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:52:57,979 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-16 10:52:57,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:57,980 INFO L225 Difference]: With dead ends: 100 [2020-10-16 10:52:57,980 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 10:52:57,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:52:57,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 10:52:57,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-16 10:52:57,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 10:52:57,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-16 10:52:57,982 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-16 10:52:57,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:57,983 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-16 10:52:57,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:52:57,983 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-16 10:52:57,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:52:57,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:57,983 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:58,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-16 10:52:58,184 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:58,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:58,185 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-16 10:52:58,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:58,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336391531] [2020-10-16 10:52:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:58,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336391531] [2020-10-16 10:52:58,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813388166] [2020-10-16 10:52:58,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:58,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:52:58,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:58,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:52:58,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:58,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:52:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:58,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:58,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:52:58,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326535872] [2020-10-16 10:52:58,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:52:58,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:58,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:52:58,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:52:58,435 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-16 10:52:59,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:52:59,291 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-16 10:52:59,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:52:59,291 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:52:59,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:52:59,292 INFO L225 Difference]: With dead ends: 84 [2020-10-16 10:52:59,292 INFO L226 Difference]: Without dead ends: 79 [2020-10-16 10:52:59,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 10:52:59,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-16 10:52:59,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-16 10:52:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-16 10:52:59,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-16 10:52:59,294 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-16 10:52:59,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:52:59,294 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-16 10:52:59,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:52:59,295 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-16 10:52:59,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:52:59,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:52:59,295 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:52:59,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-16 10:52:59,496 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:52:59,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:52:59,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-16 10:52:59,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:52:59,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920629324] [2020-10-16 10:52:59,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:52:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:52:59,705 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:59,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920629324] [2020-10-16 10:52:59,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787795534] [2020-10-16 10:52:59,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:52:59,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 10:52:59,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:52:59,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:52:59,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:52:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:52:59,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:52:59,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:52:59,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806647413] [2020-10-16 10:52:59,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:52:59,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:52:59,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:52:59,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:52:59,766 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-16 10:53:00,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:00,129 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-16 10:53:00,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 10:53:00,129 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:00,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:00,130 INFO L225 Difference]: With dead ends: 90 [2020-10-16 10:53:00,130 INFO L226 Difference]: Without dead ends: 84 [2020-10-16 10:53:00,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-10-16 10:53:00,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-16 10:53:00,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-16 10:53:00,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 10:53:00,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-16 10:53:00,133 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-16 10:53:00,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:00,134 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-16 10:53:00,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:00,134 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-16 10:53:00,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:00,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:00,135 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:00,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:00,344 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:00,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:00,344 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-16 10:53:00,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:00,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993649513] [2020-10-16 10:53:00,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:00,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993649513] [2020-10-16 10:53:00,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832477457] [2020-10-16 10:53:00,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:00,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 10:53:00,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:00,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:00,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:00,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:00,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:00,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:00,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942997956] [2020-10-16 10:53:00,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:00,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:00,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:00,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:00,802 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-16 10:53:01,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:01,198 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-16 10:53:01,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 10:53:01,198 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:01,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:01,199 INFO L225 Difference]: With dead ends: 106 [2020-10-16 10:53:01,200 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 10:53:01,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 10:53:01,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 10:53:01,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-16 10:53:01,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-16 10:53:01,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-16 10:53:01,202 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-16 10:53:01,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:01,203 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-16 10:53:01,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:01,203 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-16 10:53:01,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:01,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:01,203 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:01,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-16 10:53:01,407 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:01,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:01,407 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-16 10:53:01,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:01,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367327832] [2020-10-16 10:53:01,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:01,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367327832] [2020-10-16 10:53:01,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003150824] [2020-10-16 10:53:01,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:01,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:01,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:01,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:01,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:01,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122055533] [2020-10-16 10:53:01,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:01,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:01,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:01,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:01,671 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-16 10:53:02,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:02,091 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-16 10:53:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:53:02,091 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:02,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:02,092 INFO L225 Difference]: With dead ends: 107 [2020-10-16 10:53:02,092 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 10:53:02,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:53:02,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 10:53:02,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-16 10:53:02,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-16 10:53:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-16 10:53:02,094 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-16 10:53:02,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:02,094 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-16 10:53:02,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-16 10:53:02,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:02,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:02,095 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:02,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-16 10:53:02,303 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:02,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:02,303 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-16 10:53:02,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:02,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352388659] [2020-10-16 10:53:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:02,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352388659] [2020-10-16 10:53:02,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452918909] [2020-10-16 10:53:02,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:02,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:02,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:02,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:02,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:02,582 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:02,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:02,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:02,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044464377] [2020-10-16 10:53:02,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:02,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:02,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:02,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:02,593 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-16 10:53:03,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:03,075 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-16 10:53:03,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:53:03,076 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:03,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:03,076 INFO L225 Difference]: With dead ends: 119 [2020-10-16 10:53:03,076 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 10:53:03,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 10:53:03,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 10:53:03,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-16 10:53:03,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 10:53:03,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-16 10:53:03,078 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-16 10:53:03,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:03,079 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-16 10:53:03,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:03,079 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-16 10:53:03,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:03,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:03,080 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:03,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-16 10:53:03,280 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:03,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:03,281 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-16 10:53:03,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:03,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946001689] [2020-10-16 10:53:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:03,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946001689] [2020-10-16 10:53:03,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745687173] [2020-10-16 10:53:03,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:03,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 10:53:03,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:03,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:03,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:03,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:03,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:03,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849916865] [2020-10-16 10:53:03,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:03,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:03,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:03,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:03,547 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-16 10:53:04,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:04,035 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-16 10:53:04,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:53:04,036 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:04,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:04,036 INFO L225 Difference]: With dead ends: 119 [2020-10-16 10:53:04,036 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 10:53:04,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:53:04,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 10:53:04,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-16 10:53:04,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-16 10:53:04,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-16 10:53:04,039 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-16 10:53:04,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:04,039 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-16 10:53:04,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:04,039 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-16 10:53:04,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:04,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:04,040 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:04,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:04,246 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:04,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:04,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-16 10:53:04,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:04,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833076442] [2020-10-16 10:53:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:04,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833076442] [2020-10-16 10:53:04,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582540461] [2020-10-16 10:53:04,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:04,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:04,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:04,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:04,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:04,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:04,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:04,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:04,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021189572] [2020-10-16 10:53:04,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:04,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:04,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:04,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:04,529 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-16 10:53:05,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:05,093 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-16 10:53:05,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:53:05,093 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:05,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:05,094 INFO L225 Difference]: With dead ends: 116 [2020-10-16 10:53:05,094 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 10:53:05,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 10:53:05,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 10:53:05,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-16 10:53:05,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:53:05,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-16 10:53:05,095 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-16 10:53:05,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:05,096 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-16 10:53:05,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:05,096 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-16 10:53:05,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:05,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:05,096 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:05,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:05,297 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:05,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:05,298 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-16 10:53:05,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:05,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644932656] [2020-10-16 10:53:05,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:05,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644932656] [2020-10-16 10:53:05,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280227797] [2020-10-16 10:53:05,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:05,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 10:53:05,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:05,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:05,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:05,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:05,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:05,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920529167] [2020-10-16 10:53:05,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:05,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:05,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:05,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:05,596 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-16 10:53:06,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:06,116 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-16 10:53:06,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:53:06,117 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:06,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:06,118 INFO L225 Difference]: With dead ends: 117 [2020-10-16 10:53:06,118 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 10:53:06,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:53:06,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 10:53:06,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-16 10:53:06,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 10:53:06,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-16 10:53:06,120 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-16 10:53:06,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:06,120 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-16 10:53:06,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:06,120 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-16 10:53:06,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:06,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:06,121 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:06,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:06,322 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:06,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:06,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-16 10:53:06,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:06,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882913496] [2020-10-16 10:53:06,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:06,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882913496] [2020-10-16 10:53:06,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250668751] [2020-10-16 10:53:06,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:06,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 10:53:06,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:06,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:06,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:06,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:06,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:06,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:06,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025420481] [2020-10-16 10:53:06,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:06,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:06,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:06,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:06,606 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-16 10:53:07,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:07,252 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-16 10:53:07,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:53:07,253 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:07,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:07,253 INFO L225 Difference]: With dead ends: 114 [2020-10-16 10:53:07,253 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 10:53:07,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:53:07,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 10:53:07,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-16 10:53:07,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 10:53:07,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-16 10:53:07,256 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-16 10:53:07,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:07,256 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-16 10:53:07,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:07,256 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-16 10:53:07,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:07,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:07,257 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:07,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-16 10:53:07,459 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:07,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:07,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-16 10:53:07,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:07,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961858290] [2020-10-16 10:53:07,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:07,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961858290] [2020-10-16 10:53:07,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552318190] [2020-10-16 10:53:07,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:07,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:07,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:07,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:07,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:07,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423127552] [2020-10-16 10:53:07,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:07,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:07,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:07,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:07,704 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-16 10:53:08,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:08,296 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-16 10:53:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:53:08,296 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:08,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:08,297 INFO L225 Difference]: With dead ends: 115 [2020-10-16 10:53:08,297 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 10:53:08,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:53:08,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 10:53:08,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-16 10:53:08,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 10:53:08,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-16 10:53:08,300 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-16 10:53:08,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:08,301 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-16 10:53:08,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:08,301 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-16 10:53:08,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:08,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:08,301 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:08,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:08,511 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:08,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:08,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-16 10:53:08,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:08,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621629732] [2020-10-16 10:53:08,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:08,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621629732] [2020-10-16 10:53:08,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088377910] [2020-10-16 10:53:08,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:08,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:08,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:08,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:08,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:08,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:08,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:08,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:08,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054941371] [2020-10-16 10:53:08,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:08,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:08,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:08,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:08,767 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-16 10:53:09,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:09,480 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-16 10:53:09,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:53:09,481 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:09,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:09,481 INFO L225 Difference]: With dead ends: 112 [2020-10-16 10:53:09,481 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 10:53:09,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:53:09,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 10:53:09,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-16 10:53:09,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 10:53:09,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-16 10:53:09,484 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-16 10:53:09,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:09,484 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-16 10:53:09,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:09,484 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-16 10:53:09,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:09,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:09,484 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:09,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-16 10:53:09,685 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:09,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:09,686 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-16 10:53:09,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:09,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563959054] [2020-10-16 10:53:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:09,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563959054] [2020-10-16 10:53:09,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425308108] [2020-10-16 10:53:09,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:09,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 10:53:09,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:09,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:09,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:09,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:09,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:09,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850701117] [2020-10-16 10:53:09,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:09,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:09,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:09,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:09,928 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-16 10:53:10,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:10,567 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-16 10:53:10,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:53:10,568 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:10,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:10,568 INFO L225 Difference]: With dead ends: 113 [2020-10-16 10:53:10,568 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 10:53:10,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 10:53:10,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 10:53:10,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-16 10:53:10,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:53:10,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-16 10:53:10,570 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-16 10:53:10,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:10,571 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-16 10:53:10,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:10,571 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-16 10:53:10,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:10,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:10,571 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:10,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-16 10:53:10,772 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:10,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:10,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-16 10:53:10,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:10,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106305072] [2020-10-16 10:53:10,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:10,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106305072] [2020-10-16 10:53:10,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192840447] [2020-10-16 10:53:10,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:10,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:10,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:10,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:10,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:11,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:11,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:11,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:11,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3852701] [2020-10-16 10:53:11,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:11,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:11,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:11,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:11,033 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-16 10:53:11,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:11,813 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-16 10:53:11,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:53:11,813 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:11,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:11,814 INFO L225 Difference]: With dead ends: 110 [2020-10-16 10:53:11,814 INFO L226 Difference]: Without dead ends: 104 [2020-10-16 10:53:11,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 10:53:11,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-16 10:53:11,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-16 10:53:11,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:53:11,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-16 10:53:11,816 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-16 10:53:11,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:11,816 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-16 10:53:11,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:11,816 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-16 10:53:11,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:11,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:11,817 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:12,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-16 10:53:12,018 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:12,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:12,018 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-16 10:53:12,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:12,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094446737] [2020-10-16 10:53:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:12,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094446737] [2020-10-16 10:53:12,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822006054] [2020-10-16 10:53:12,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:12,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 10:53:12,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:12,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:12,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:12,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:12,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:12,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237692104] [2020-10-16 10:53:12,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:12,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:12,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:12,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:12,261 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-16 10:53:13,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:13,043 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-16 10:53:13,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 10:53:13,044 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:13,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:13,044 INFO L225 Difference]: With dead ends: 111 [2020-10-16 10:53:13,044 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 10:53:13,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:53:13,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 10:53:13,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-16 10:53:13,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 10:53:13,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-16 10:53:13,046 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-16 10:53:13,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:13,047 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-16 10:53:13,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:13,047 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-16 10:53:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:13,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:13,047 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:13,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:13,248 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:13,249 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-16 10:53:13,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:13,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226127775] [2020-10-16 10:53:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:13,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226127775] [2020-10-16 10:53:13,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132695908] [2020-10-16 10:53:13,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:13,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 10:53:13,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:13,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:13,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:13,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:13,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:13,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:13,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362500944] [2020-10-16 10:53:13,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:13,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:13,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:13,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:13,504 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-16 10:53:14,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:14,372 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-16 10:53:14,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:53:14,373 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:14,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:14,374 INFO L225 Difference]: With dead ends: 108 [2020-10-16 10:53:14,374 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 10:53:14,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 10:53:14,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 10:53:14,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-16 10:53:14,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 10:53:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-16 10:53:14,377 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-16 10:53:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:14,378 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-16 10:53:14,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:14,378 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-16 10:53:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:14,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:14,378 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:14,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-16 10:53:14,587 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:14,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:14,587 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-16 10:53:14,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:14,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789570786] [2020-10-16 10:53:14,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:14,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789570786] [2020-10-16 10:53:14,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717649012] [2020-10-16 10:53:14,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:14,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:14,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:14,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:14,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-16 10:53:14,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436875215] [2020-10-16 10:53:14,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 10:53:14,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:14,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 10:53:14,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-16 10:53:14,823 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-16 10:53:15,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:15,562 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-16 10:53:15,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:53:15,562 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-16 10:53:15,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:15,563 INFO L225 Difference]: With dead ends: 128 [2020-10-16 10:53:15,563 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 10:53:15,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 10:53:15,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 10:53:15,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-16 10:53:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 10:53:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-16 10:53:15,566 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-16 10:53:15,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:15,566 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-16 10:53:15,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 10:53:15,566 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-16 10:53:15,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 10:53:15,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:15,567 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:15,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:15,767 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:15,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:15,768 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-16 10:53:15,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:15,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812011037] [2020-10-16 10:53:15,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:15,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812011037] [2020-10-16 10:53:15,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596845975] [2020-10-16 10:53:15,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:15,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:15,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:15,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-16 10:53:15,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:16,001 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:16,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:16,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 10:53:16,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420973014] [2020-10-16 10:53:16,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:16,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:16,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:16,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:16,017 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-16 10:53:16,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:16,924 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-16 10:53:16,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 10:53:16,925 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-16 10:53:16,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:16,925 INFO L225 Difference]: With dead ends: 109 [2020-10-16 10:53:16,925 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 10:53:16,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 10:53:16,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 10:53:16,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-16 10:53:16,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 10:53:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-16 10:53:16,928 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-16 10:53:16,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:16,928 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-16 10:53:16,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:16,928 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-16 10:53:16,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:16,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:16,929 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:17,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:17,129 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:17,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:17,130 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-16 10:53:17,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:17,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732889228] [2020-10-16 10:53:17,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:17,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732889228] [2020-10-16 10:53:17,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250048070] [2020-10-16 10:53:17,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:17,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 10:53:17,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:17,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:17,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:17,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:17,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:17,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999881256] [2020-10-16 10:53:17,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:17,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:17,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:17,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:17,435 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-16 10:53:17,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:17,848 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-16 10:53:17,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:53:17,848 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:17,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:17,849 INFO L225 Difference]: With dead ends: 124 [2020-10-16 10:53:17,849 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 10:53:17,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-10-16 10:53:17,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 10:53:17,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-16 10:53:17,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:17,852 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:17,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:17,852 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:17,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:17,852 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:17,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:17,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:17,853 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:18,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:18,060 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:18,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:18,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-16 10:53:18,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:18,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591386121] [2020-10-16 10:53:18,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:18,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591386121] [2020-10-16 10:53:18,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016299847] [2020-10-16 10:53:18,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:18,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:18,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:18,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:18,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:18,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:18,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:18,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:18,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395274301] [2020-10-16 10:53:18,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:18,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:18,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:18,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:18,393 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:18,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:18,906 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-16 10:53:18,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:53:18,906 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:18,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:18,907 INFO L225 Difference]: With dead ends: 121 [2020-10-16 10:53:18,907 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 10:53:18,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:53:18,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 10:53:18,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-16 10:53:18,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:18,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:18,910 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:18,910 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:18,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:18,910 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:18,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:18,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:18,910 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:19,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:19,111 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:19,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:19,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-16 10:53:19,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:19,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169153037] [2020-10-16 10:53:19,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:19,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169153037] [2020-10-16 10:53:19,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741682064] [2020-10-16 10:53:19,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:19,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 10:53:19,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:19,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:19,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:19,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:19,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:19,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523075578] [2020-10-16 10:53:19,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:19,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:19,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:19,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:19,408 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:19,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:19,890 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-16 10:53:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:53:19,891 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:19,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:19,891 INFO L225 Difference]: With dead ends: 118 [2020-10-16 10:53:19,891 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 10:53:19,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-10-16 10:53:19,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 10:53:19,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-16 10:53:19,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:19,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:19,894 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:19,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:19,894 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:19,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:19,894 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:19,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:19,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:19,894 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:20,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:20,095 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:20,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:20,096 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-16 10:53:20,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:20,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967428399] [2020-10-16 10:53:20,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:20,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967428399] [2020-10-16 10:53:20,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815182755] [2020-10-16 10:53:20,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:20,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 10:53:20,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:20,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:20,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:20,394 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:20,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:20,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:20,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076337021] [2020-10-16 10:53:20,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:20,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:20,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:20,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:20,407 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:21,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:21,004 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-16 10:53:21,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:53:21,004 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:21,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:21,005 INFO L225 Difference]: With dead ends: 117 [2020-10-16 10:53:21,005 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 10:53:21,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:53:21,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 10:53:21,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-16 10:53:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:21,008 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:21,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:21,008 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:21,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:21,008 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:21,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:21,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:21,009 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:21,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-16 10:53:21,209 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:21,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:21,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-16 10:53:21,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:21,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566393286] [2020-10-16 10:53:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:21,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566393286] [2020-10-16 10:53:21,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991509300] [2020-10-16 10:53:21,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:21,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:21,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:21,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:21,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:21,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269095675] [2020-10-16 10:53:21,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:21,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:21,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:21,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:21,508 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:22,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:22,034 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-16 10:53:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:53:22,035 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:22,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:22,035 INFO L225 Difference]: With dead ends: 114 [2020-10-16 10:53:22,036 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 10:53:22,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 10:53:22,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 10:53:22,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-16 10:53:22,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:22,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:22,038 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:22,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:22,038 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:22,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:22,039 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:22,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:22,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:22,039 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:22,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-16 10:53:22,242 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:22,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:22,243 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-16 10:53:22,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:22,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178118519] [2020-10-16 10:53:22,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:22,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178118519] [2020-10-16 10:53:22,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580302426] [2020-10-16 10:53:22,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:22,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:22,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:22,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:22,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:22,590 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:22,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:22,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:22,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296984412] [2020-10-16 10:53:22,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:22,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:22,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:22,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:22,612 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:23,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:23,420 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-16 10:53:23,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:53:23,421 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:23,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:23,422 INFO L225 Difference]: With dead ends: 113 [2020-10-16 10:53:23,422 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 10:53:23,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:53:23,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 10:53:23,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-16 10:53:23,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:23,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:23,424 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:23,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:23,424 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:23,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:23,424 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:23,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:23,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:23,425 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:23,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-16 10:53:23,631 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:23,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:23,631 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-16 10:53:23,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:23,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303337102] [2020-10-16 10:53:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:23,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303337102] [2020-10-16 10:53:23,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718667256] [2020-10-16 10:53:23,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:23,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 10:53:23,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:23,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:23,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:23,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:23,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:23,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575181386] [2020-10-16 10:53:23,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:23,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:23,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:23,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:23,928 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:24,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:24,525 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-16 10:53:24,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:53:24,525 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:24,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:24,526 INFO L225 Difference]: With dead ends: 110 [2020-10-16 10:53:24,526 INFO L226 Difference]: Without dead ends: 104 [2020-10-16 10:53:24,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:53:24,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-16 10:53:24,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-16 10:53:24,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:24,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:24,528 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:24,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:24,528 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:24,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:24,528 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:24,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:24,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:24,529 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:24,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-16 10:53:24,731 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:24,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:24,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-16 10:53:24,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:24,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913664970] [2020-10-16 10:53:24,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:24,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913664970] [2020-10-16 10:53:24,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135559394] [2020-10-16 10:53:24,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:24,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:24,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:24,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:24,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:25,011 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:25,024 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:25,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:25,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:25,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541273759] [2020-10-16 10:53:25,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:25,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:25,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:25,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:25,025 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:25,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:25,786 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-16 10:53:25,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:53:25,787 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:25,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:25,787 INFO L225 Difference]: With dead ends: 109 [2020-10-16 10:53:25,788 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 10:53:25,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 10:53:25,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 10:53:25,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-16 10:53:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:25,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:25,790 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:25,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:25,790 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:25,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:25,790 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:25,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:25,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:25,790 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:25,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:25,991 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:25,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:25,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-16 10:53:25,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:25,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904284607] [2020-10-16 10:53:25,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:26,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904284607] [2020-10-16 10:53:26,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498795553] [2020-10-16 10:53:26,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:26,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 10:53:26,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:26,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:26,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:26,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:26,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:26,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040572088] [2020-10-16 10:53:26,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:26,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:26,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:26,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:26,269 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:26,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:26,932 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-16 10:53:26,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:53:26,933 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:26,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:26,933 INFO L225 Difference]: With dead ends: 106 [2020-10-16 10:53:26,933 INFO L226 Difference]: Without dead ends: 100 [2020-10-16 10:53:26,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:53:26,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-16 10:53:26,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-16 10:53:26,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:26,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:26,936 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:26,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:26,936 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:26,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:26,937 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:26,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:26,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:26,937 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:27,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-16 10:53:27,138 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:27,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:27,138 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-16 10:53:27,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:27,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739405083] [2020-10-16 10:53:27,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:27,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739405083] [2020-10-16 10:53:27,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858556022] [2020-10-16 10:53:27,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:27,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 10:53:27,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:27,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:27,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:27,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:27,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:27,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:27,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816681526] [2020-10-16 10:53:27,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:27,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:27,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:27,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:27,434 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:28,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:28,278 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-16 10:53:28,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:53:28,279 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:28,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:28,279 INFO L225 Difference]: With dead ends: 105 [2020-10-16 10:53:28,279 INFO L226 Difference]: Without dead ends: 99 [2020-10-16 10:53:28,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:53:28,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-16 10:53:28,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-16 10:53:28,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:28,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:28,282 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:28,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:28,282 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:28,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:28,282 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:28,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:28,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:28,282 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:28,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:28,483 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:28,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-16 10:53:28,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:28,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973865230] [2020-10-16 10:53:28,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:28,678 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:28,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973865230] [2020-10-16 10:53:28,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95739156] [2020-10-16 10:53:28,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:28,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:28,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:28,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:28,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:28,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025333320] [2020-10-16 10:53:28,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:28,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:28,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:28,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:28,754 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:29,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:29,470 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-16 10:53:29,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:53:29,470 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:29,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:29,471 INFO L225 Difference]: With dead ends: 102 [2020-10-16 10:53:29,471 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 10:53:29,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 10:53:29,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 10:53:29,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-16 10:53:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:29,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:29,474 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:29,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:29,474 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:29,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:29,475 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:29,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:29,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:29,475 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:29,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:29,676 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:29,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:29,676 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-16 10:53:29,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:29,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460254973] [2020-10-16 10:53:29,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:29,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460254973] [2020-10-16 10:53:29,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131313424] [2020-10-16 10:53:29,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:29,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:29,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:29,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:29,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:29,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:29,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:29,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:29,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119892115] [2020-10-16 10:53:29,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:29,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:29,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:29,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:29,955 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:30,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:30,894 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-16 10:53:30,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:53:30,895 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:30,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:30,895 INFO L225 Difference]: With dead ends: 101 [2020-10-16 10:53:30,896 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 10:53:30,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 10:53:30,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 10:53:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-16 10:53:30,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:30,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:30,898 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:30,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:30,898 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:30,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:30,899 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:30,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:30,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:30,899 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:31,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-16 10:53:31,104 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:31,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:31,104 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-16 10:53:31,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:31,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36754155] [2020-10-16 10:53:31,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:31,302 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:31,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36754155] [2020-10-16 10:53:31,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762120586] [2020-10-16 10:53:31,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:31,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-16 10:53:31,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:31,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:31,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:31,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:31,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:31,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038236523] [2020-10-16 10:53:31,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:31,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:31,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:31,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:31,374 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:32,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:32,155 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-16 10:53:32,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 10:53:32,155 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:32,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:32,156 INFO L225 Difference]: With dead ends: 98 [2020-10-16 10:53:32,156 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 10:53:32,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 10:53:32,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 10:53:32,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-16 10:53:32,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:32,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:32,158 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-16 10:53:32,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:32,159 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:32,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:32,159 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:32,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:32,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:32,159 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:32,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:32,360 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:32,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:32,361 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-16 10:53:32,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:32,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772795593] [2020-10-16 10:53:32,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:32,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772795593] [2020-10-16 10:53:32,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86878796] [2020-10-16 10:53:32,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:32,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:32,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:32,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:32,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:32,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:32,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:32,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:32,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880936798] [2020-10-16 10:53:32,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:32,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:32,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:32,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:32,640 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-16 10:53:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:33,671 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-16 10:53:33,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 10:53:33,671 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:33,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:33,672 INFO L225 Difference]: With dead ends: 97 [2020-10-16 10:53:33,672 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 10:53:33,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 10:53:33,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 10:53:33,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-16 10:53:33,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:33,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:33,674 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-16 10:53:33,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:33,675 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:33,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:33,675 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:33,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:33,675 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:33,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-16 10:53:33,876 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:33,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:33,877 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-16 10:53:33,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:33,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894182941] [2020-10-16 10:53:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:34,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894182941] [2020-10-16 10:53:34,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969700195] [2020-10-16 10:53:34,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:34,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 10:53:34,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:34,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:34,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:34,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:34,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-16 10:53:34,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657528598] [2020-10-16 10:53:34,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 10:53:34,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:34,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 10:53:34,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-16 10:53:34,139 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-16 10:53:34,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:34,975 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-16 10:53:34,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:53:34,976 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-16 10:53:34,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:34,977 INFO L225 Difference]: With dead ends: 113 [2020-10-16 10:53:34,977 INFO L226 Difference]: Without dead ends: 107 [2020-10-16 10:53:34,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 10:53:34,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-16 10:53:34,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-16 10:53:34,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 10:53:34,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-16 10:53:34,980 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-16 10:53:34,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:34,980 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-16 10:53:34,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 10:53:34,981 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-16 10:53:34,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:34,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:34,981 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:35,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-16 10:53:35,182 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:35,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:35,183 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-16 10:53:35,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:35,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246842964] [2020-10-16 10:53:35,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:35,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246842964] [2020-10-16 10:53:35,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782401192] [2020-10-16 10:53:35,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:35,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 10:53:35,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:35,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:35,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:35,455 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:35,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:35,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:35,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311955916] [2020-10-16 10:53:35,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:35,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:35,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:35,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:35,471 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-16 10:53:36,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:36,539 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-10-16 10:53:36,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 10:53:36,539 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:36,540 INFO L225 Difference]: With dead ends: 94 [2020-10-16 10:53:36,540 INFO L226 Difference]: Without dead ends: 86 [2020-10-16 10:53:36,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 10:53:36,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-16 10:53:36,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-10-16 10:53:36,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-16 10:53:36,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-16 10:53:36,541 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-16 10:53:36,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:36,542 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-16 10:53:36,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:36,542 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-16 10:53:36,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 10:53:36,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:36,542 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:36,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-16 10:53:36,743 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:36,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:36,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-16 10:53:36,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:36,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324645136] [2020-10-16 10:53:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:36,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324645136] [2020-10-16 10:53:36,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700145388] [2020-10-16 10:53:36,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:36,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 10:53:36,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:36,993 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:53:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:37,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:37,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-16 10:53:37,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837475620] [2020-10-16 10:53:37,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:37,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:37,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:37,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:37,014 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-16 10:53:38,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:38,005 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-16 10:53:38,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:53:38,006 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-16 10:53:38,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:38,006 INFO L225 Difference]: With dead ends: 108 [2020-10-16 10:53:38,006 INFO L226 Difference]: Without dead ends: 103 [2020-10-16 10:53:38,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 10:53:38,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-16 10:53:38,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-16 10:53:38,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 10:53:38,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-16 10:53:38,009 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-16 10:53:38,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:38,009 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-16 10:53:38,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:38,009 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-16 10:53:38,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:38,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:38,009 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:38,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-16 10:53:38,210 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:38,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:38,211 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-16 10:53:38,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:38,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798370469] [2020-10-16 10:53:38,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:38,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798370469] [2020-10-16 10:53:38,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942539685] [2020-10-16 10:53:38,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:38,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:38,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:38,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:38,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:38,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:53:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:38,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:38,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:38,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053453091] [2020-10-16 10:53:38,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:38,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:38,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:38,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:38,522 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-16 10:53:39,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:39,618 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-16 10:53:39,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:53:39,618 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:53:39,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:39,619 INFO L225 Difference]: With dead ends: 90 [2020-10-16 10:53:39,619 INFO L226 Difference]: Without dead ends: 85 [2020-10-16 10:53:39,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 10:53:39,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-16 10:53:39,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-16 10:53:39,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-16 10:53:39,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-16 10:53:39,621 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-16 10:53:39,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:39,622 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-16 10:53:39,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:53:39,622 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-16 10:53:39,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:39,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:39,622 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:39,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:39,823 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:39,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:39,824 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-16 10:53:39,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:39,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119449125] [2020-10-16 10:53:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:40,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119449125] [2020-10-16 10:53:40,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075589885] [2020-10-16 10:53:40,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:40,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:53:40,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:40,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:40,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:40,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:40,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:53:40,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750470948] [2020-10-16 10:53:40,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:40,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:40,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:40,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:40,159 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-16 10:53:40,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:40,616 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-16 10:53:40,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 10:53:40,617 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:53:40,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:40,617 INFO L225 Difference]: With dead ends: 96 [2020-10-16 10:53:40,617 INFO L226 Difference]: Without dead ends: 90 [2020-10-16 10:53:40,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-10-16 10:53:40,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-16 10:53:40,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-16 10:53:40,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 10:53:40,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-16 10:53:40,620 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-16 10:53:40,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:40,620 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-16 10:53:40,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:40,620 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-16 10:53:40,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:40,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:40,621 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:40,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:40,829 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:40,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:40,830 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-16 10:53:40,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:40,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661819966] [2020-10-16 10:53:40,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:41,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661819966] [2020-10-16 10:53:41,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523215353] [2020-10-16 10:53:41,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:41,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:41,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:41,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:41,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:41,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:41,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:41,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:41,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843871557] [2020-10-16 10:53:41,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:41,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:41,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:41,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:41,212 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-16 10:53:41,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:41,682 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-16 10:53:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 10:53:41,683 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:53:41,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:41,683 INFO L225 Difference]: With dead ends: 114 [2020-10-16 10:53:41,683 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 10:53:41,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-10-16 10:53:41,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 10:53:41,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-16 10:53:41,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-16 10:53:41,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-16 10:53:41,686 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-16 10:53:41,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:41,686 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-16 10:53:41,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:53:41,686 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-16 10:53:41,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:41,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:41,686 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:41,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:41,887 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:41,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:41,888 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-16 10:53:41,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:41,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461576301] [2020-10-16 10:53:41,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:42,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461576301] [2020-10-16 10:53:42,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223319743] [2020-10-16 10:53:42,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:42,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 10:53:42,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:42,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:42,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:42,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:42,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:53:42,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953723156] [2020-10-16 10:53:42,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:42,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:42,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:42,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:42,227 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-16 10:53:42,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:42,748 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-16 10:53:42,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:53:42,749 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:53:42,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:42,749 INFO L225 Difference]: With dead ends: 115 [2020-10-16 10:53:42,749 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 10:53:42,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 10:53:42,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 10:53:42,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-16 10:53:42,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-16 10:53:42,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-16 10:53:42,752 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-16 10:53:42,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:42,752 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-16 10:53:42,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:42,752 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-16 10:53:42,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:42,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:42,753 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:42,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:42,954 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:42,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:42,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-16 10:53:42,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:42,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914507935] [2020-10-16 10:53:42,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:43,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914507935] [2020-10-16 10:53:43,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494465314] [2020-10-16 10:53:43,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:43,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 10:53:43,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:43,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:43,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:43,302 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:43,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:43,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:43,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36646995] [2020-10-16 10:53:43,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:43,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:43,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:43,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:43,316 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-16 10:53:43,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:43,883 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-16 10:53:43,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:53:43,884 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:53:43,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:43,884 INFO L225 Difference]: With dead ends: 129 [2020-10-16 10:53:43,885 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 10:53:43,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:53:43,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 10:53:43,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-16 10:53:43,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 10:53:43,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-16 10:53:43,887 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-16 10:53:43,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:43,887 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-16 10:53:43,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:53:43,888 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-16 10:53:43,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:43,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:43,888 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:44,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:44,089 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:44,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:44,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-16 10:53:44,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:44,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764868660] [2020-10-16 10:53:44,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:44,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:44,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764868660] [2020-10-16 10:53:44,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973112551] [2020-10-16 10:53:44,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:44,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:44,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:44,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:44,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:53:44,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546973117] [2020-10-16 10:53:44,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:44,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:44,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:44,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:44,404 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-16 10:53:45,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:45,005 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-16 10:53:45,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:53:45,005 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:53:45,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:45,006 INFO L225 Difference]: With dead ends: 129 [2020-10-16 10:53:45,006 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 10:53:45,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:53:45,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 10:53:45,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-16 10:53:45,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-16 10:53:45,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-16 10:53:45,008 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-16 10:53:45,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:45,009 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-16 10:53:45,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:45,009 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-16 10:53:45,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:45,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:45,009 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:45,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:45,210 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:45,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:45,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-16 10:53:45,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:45,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720823798] [2020-10-16 10:53:45,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:45,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720823798] [2020-10-16 10:53:45,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680880826] [2020-10-16 10:53:45,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:45,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:45,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:45,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:45,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:45,541 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:45,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:45,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:45,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854771876] [2020-10-16 10:53:45,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:45,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:45,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:45,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:45,558 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-16 10:53:46,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:46,229 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-16 10:53:46,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:53:46,229 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:53:46,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:46,230 INFO L225 Difference]: With dead ends: 126 [2020-10-16 10:53:46,230 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 10:53:46,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:53:46,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 10:53:46,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-16 10:53:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 10:53:46,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-16 10:53:46,234 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-16 10:53:46,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:46,234 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-16 10:53:46,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:53:46,235 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-16 10:53:46,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:46,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:46,235 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:46,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:46,436 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:46,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:46,436 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-16 10:53:46,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:46,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726459341] [2020-10-16 10:53:46,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:46,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726459341] [2020-10-16 10:53:46,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292062153] [2020-10-16 10:53:46,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:46,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:53:46,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:46,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:46,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:46,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:46,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:53:46,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321647464] [2020-10-16 10:53:46,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:46,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:46,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:46,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:46,750 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-16 10:53:47,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:47,399 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-16 10:53:47,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:53:47,399 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:53:47,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:47,400 INFO L225 Difference]: With dead ends: 127 [2020-10-16 10:53:47,400 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 10:53:47,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 10:53:47,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 10:53:47,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-16 10:53:47,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:53:47,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-16 10:53:47,402 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-16 10:53:47,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:47,402 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-16 10:53:47,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:47,402 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-16 10:53:47,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:47,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:47,403 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:47,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-16 10:53:47,604 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:47,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:47,604 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-16 10:53:47,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:47,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186967227] [2020-10-16 10:53:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:47,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186967227] [2020-10-16 10:53:47,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871222265] [2020-10-16 10:53:47,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:47,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:47,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:47,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:47,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:47,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:47,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:47,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:47,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851049639] [2020-10-16 10:53:47,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:47,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:47,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:47,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:47,944 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-16 10:53:48,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:48,691 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-16 10:53:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:53:48,691 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:53:48,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:48,692 INFO L225 Difference]: With dead ends: 124 [2020-10-16 10:53:48,692 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 10:53:48,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 10:53:48,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 10:53:48,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-16 10:53:48,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:53:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-16 10:53:48,694 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-16 10:53:48,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:48,695 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-16 10:53:48,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:53:48,695 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-16 10:53:48,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:48,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:48,695 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:48,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-16 10:53:48,896 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:48,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:48,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-16 10:53:48,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:48,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298906897] [2020-10-16 10:53:48,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:49,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298906897] [2020-10-16 10:53:49,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268573337] [2020-10-16 10:53:49,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:49,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 10:53:49,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:49,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:49,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:49,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:49,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:53:49,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561657318] [2020-10-16 10:53:49,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:49,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:49,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:49,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:49,218 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-16 10:53:49,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:49,903 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-16 10:53:49,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:53:49,904 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:53:49,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:49,904 INFO L225 Difference]: With dead ends: 125 [2020-10-16 10:53:49,904 INFO L226 Difference]: Without dead ends: 119 [2020-10-16 10:53:49,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:53:49,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-16 10:53:49,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-16 10:53:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 10:53:49,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-16 10:53:49,906 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-16 10:53:49,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:49,906 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-16 10:53:49,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:49,906 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-16 10:53:49,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:49,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:49,907 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:50,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-16 10:53:50,108 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:50,108 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-16 10:53:50,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:50,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585800141] [2020-10-16 10:53:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:50,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585800141] [2020-10-16 10:53:50,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059300782] [2020-10-16 10:53:50,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:50,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 10:53:50,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:50,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:50,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:50,421 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:50,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:50,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:50,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31579230] [2020-10-16 10:53:50,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:50,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:50,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:50,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:50,444 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-16 10:53:51,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:51,281 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-16 10:53:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:53:51,282 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:53:51,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:51,282 INFO L225 Difference]: With dead ends: 122 [2020-10-16 10:53:51,283 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 10:53:51,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 10:53:51,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 10:53:51,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-16 10:53:51,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 10:53:51,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-16 10:53:51,285 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-16 10:53:51,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:51,285 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-16 10:53:51,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:53:51,285 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-16 10:53:51,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:51,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:51,286 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:51,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-16 10:53:51,487 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:51,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:51,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-16 10:53:51,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:51,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414394830] [2020-10-16 10:53:51,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:51,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414394830] [2020-10-16 10:53:51,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181935002] [2020-10-16 10:53:51,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:51,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:51,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:51,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:51,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:53:51,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590541208] [2020-10-16 10:53:51,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:51,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:51,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:51,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:51,774 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-16 10:53:52,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:52,544 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-16 10:53:52,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 10:53:52,545 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:53:52,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:52,546 INFO L225 Difference]: With dead ends: 123 [2020-10-16 10:53:52,546 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 10:53:52,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 10:53:52,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 10:53:52,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-16 10:53:52,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 10:53:52,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-16 10:53:52,548 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-16 10:53:52,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:52,548 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-16 10:53:52,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:52,549 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-16 10:53:52,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:52,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:52,549 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:52,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:52,750 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:52,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:52,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-16 10:53:52,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:52,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101160246] [2020-10-16 10:53:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:52,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101160246] [2020-10-16 10:53:52,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669677833] [2020-10-16 10:53:52,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:53,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:53:53,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:53,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:53,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:53,060 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:53,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:53,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:53,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484634746] [2020-10-16 10:53:53,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:53,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:53,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:53,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:53,076 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-16 10:53:54,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:54,021 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-16 10:53:54,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:53:54,022 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:53:54,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:54,022 INFO L225 Difference]: With dead ends: 120 [2020-10-16 10:53:54,022 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 10:53:54,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 10:53:54,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 10:53:54,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-16 10:53:54,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 10:53:54,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-16 10:53:54,024 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-16 10:53:54,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:54,024 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-16 10:53:54,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:53:54,025 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-16 10:53:54,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:54,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:54,025 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:54,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:54,226 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:54,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:54,227 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-16 10:53:54,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:54,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073799219] [2020-10-16 10:53:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:54,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073799219] [2020-10-16 10:53:54,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093917550] [2020-10-16 10:53:54,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:54,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:53:54,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:54,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:54,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:54,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:54,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:53:54,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725106444] [2020-10-16 10:53:54,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:54,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:54,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:54,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:54,519 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-16 10:53:55,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:55,349 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-16 10:53:55,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:53:55,349 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:53:55,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:55,350 INFO L225 Difference]: With dead ends: 121 [2020-10-16 10:53:55,350 INFO L226 Difference]: Without dead ends: 115 [2020-10-16 10:53:55,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 10:53:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-16 10:53:55,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-16 10:53:55,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:53:55,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-16 10:53:55,352 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-16 10:53:55,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:55,352 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-16 10:53:55,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:55,352 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-16 10:53:55,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:55,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:55,353 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:55,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-16 10:53:55,554 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:55,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:55,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-16 10:53:55,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:55,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182406203] [2020-10-16 10:53:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:55,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182406203] [2020-10-16 10:53:55,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495399691] [2020-10-16 10:53:55,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:55,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:53:55,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:55,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:55,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:55,849 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:55,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:55,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:55,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620772586] [2020-10-16 10:53:55,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:55,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:55,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:55,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:55,866 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-16 10:53:56,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:56,981 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-16 10:53:56,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 10:53:56,982 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:53:56,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:56,982 INFO L225 Difference]: With dead ends: 118 [2020-10-16 10:53:56,982 INFO L226 Difference]: Without dead ends: 112 [2020-10-16 10:53:56,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 10:53:56,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-16 10:53:56,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-16 10:53:56,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:53:56,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-16 10:53:56,984 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-16 10:53:56,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:56,985 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-16 10:53:56,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:53:56,985 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-16 10:53:56,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:56,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:56,985 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:57,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:57,186 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:57,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:57,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-16 10:53:57,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:57,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885271944] [2020-10-16 10:53:57,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:57,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885271944] [2020-10-16 10:53:57,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294336303] [2020-10-16 10:53:57,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:57,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 10:53:57,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:57,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:57,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:57,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:57,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:53:57,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902982948] [2020-10-16 10:53:57,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:53:57,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:57,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:53:57,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:53:57,472 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-16 10:53:58,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:53:58,357 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-16 10:53:58,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 10:53:58,358 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:53:58,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:53:58,358 INFO L225 Difference]: With dead ends: 119 [2020-10-16 10:53:58,359 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 10:53:58,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 10:53:58,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 10:53:58,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-16 10:53:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 10:53:58,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-16 10:53:58,362 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-16 10:53:58,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:53:58,362 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-16 10:53:58,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:53:58,362 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-16 10:53:58,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:53:58,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:53:58,363 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:53:58,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:53:58,570 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:53:58,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:53:58,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-16 10:53:58,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:53:58,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886754615] [2020-10-16 10:53:58,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:53:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:53:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:58,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886754615] [2020-10-16 10:53:58,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837396797] [2020-10-16 10:53:58,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:53:58,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 10:53:58,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:53:58,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:53:58,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:53:58,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:53:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:53:58,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:53:58,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:53:58,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724236992] [2020-10-16 10:53:58,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:53:58,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:53:58,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:53:58,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:53:58,900 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-16 10:54:00,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:00,072 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-16 10:54:00,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 10:54:00,073 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:54:00,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:00,073 INFO L225 Difference]: With dead ends: 116 [2020-10-16 10:54:00,074 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 10:54:00,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 10:54:00,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 10:54:00,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-16 10:54:00,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 10:54:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-16 10:54:00,076 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-16 10:54:00,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:00,076 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-16 10:54:00,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:00,076 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-16 10:54:00,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:54:00,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:00,077 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:00,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:00,278 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:00,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:00,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-16 10:54:00,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:00,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776769855] [2020-10-16 10:54:00,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:00,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776769855] [2020-10-16 10:54:00,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107035736] [2020-10-16 10:54:00,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:00,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:54:00,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:00,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:00,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-16 10:54:00,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713440634] [2020-10-16 10:54:00,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 10:54:00,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:00,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 10:54:00,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-16 10:54:00,567 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-16 10:54:01,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:01,504 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-16 10:54:01,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 10:54:01,505 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-16 10:54:01,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:01,506 INFO L225 Difference]: With dead ends: 136 [2020-10-16 10:54:01,506 INFO L226 Difference]: Without dead ends: 130 [2020-10-16 10:54:01,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 10:54:01,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-16 10:54:01,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-16 10:54:01,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 10:54:01,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-16 10:54:01,510 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-16 10:54:01,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:01,510 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-16 10:54:01,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 10:54:01,510 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-16 10:54:01,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 10:54:01,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:01,510 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:01,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:01,720 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:01,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:01,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-16 10:54:01,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:01,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853817297] [2020-10-16 10:54:01,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:01,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853817297] [2020-10-16 10:54:01,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183252656] [2020-10-16 10:54:01,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:01,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:54:01,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:01,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 10:54:01,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:02,015 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:02,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:02,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 10:54:02,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377793390] [2020-10-16 10:54:02,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:02,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:02,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:02,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:02,033 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-16 10:54:03,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:03,172 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-16 10:54:03,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 10:54:03,173 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-16 10:54:03,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:03,174 INFO L225 Difference]: With dead ends: 117 [2020-10-16 10:54:03,174 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 10:54:03,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 10:54:03,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 10:54:03,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-16 10:54:03,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 10:54:03,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-16 10:54:03,177 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-16 10:54:03,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:03,178 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-16 10:54:03,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:03,178 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-16 10:54:03,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:03,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:03,178 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:03,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:03,379 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:03,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:03,380 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-16 10:54:03,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:03,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690756151] [2020-10-16 10:54:03,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:03,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690756151] [2020-10-16 10:54:03,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048732800] [2020-10-16 10:54:03,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:03,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:54:03,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:03,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:03,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:03,746 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:03,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:03,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:03,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30766586] [2020-10-16 10:54:03,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:03,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:03,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:03,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:03,748 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-16 10:54:04,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:04,279 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-16 10:54:04,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:54:04,280 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:04,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:04,280 INFO L225 Difference]: With dead ends: 134 [2020-10-16 10:54:04,280 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 10:54:04,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-16 10:54:04,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 10:54:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-16 10:54:04,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:04,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:04,283 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:04,283 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:04,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:04,284 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:04,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:04,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:04,284 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:04,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-16 10:54:04,485 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:04,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:04,486 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-16 10:54:04,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:04,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714927914] [2020-10-16 10:54:04,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:04,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714927914] [2020-10-16 10:54:04,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616519507] [2020-10-16 10:54:04,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:04,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:54:04,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:04,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:04,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:04,881 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:04,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:04,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:04,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020349] [2020-10-16 10:54:04,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:04,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:04,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:04,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:04,895 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:05,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:05,515 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-16 10:54:05,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:54:05,515 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:05,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:05,516 INFO L225 Difference]: With dead ends: 131 [2020-10-16 10:54:05,516 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 10:54:05,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:54:05,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 10:54:05,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-16 10:54:05,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:05,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:05,518 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:05,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:05,518 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:05,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:05,519 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:05,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:05,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:05,519 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:05,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-16 10:54:05,720 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:05,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:05,720 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-16 10:54:05,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:05,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318461517] [2020-10-16 10:54:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:06,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318461517] [2020-10-16 10:54:06,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728864657] [2020-10-16 10:54:06,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:06,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 10:54:06,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:06,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:06,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:06,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:06,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:06,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346726086] [2020-10-16 10:54:06,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:06,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:06,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:06,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:06,087 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:06,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:06,685 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-16 10:54:06,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 10:54:06,686 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:06,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:06,686 INFO L225 Difference]: With dead ends: 128 [2020-10-16 10:54:06,687 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 10:54:06,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-10-16 10:54:06,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 10:54:06,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-16 10:54:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:06,689 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:06,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:06,690 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:06,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:06,690 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:06,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:06,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:06,690 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:06,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:06,891 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:06,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:06,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-16 10:54:06,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:06,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449138164] [2020-10-16 10:54:06,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:07,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449138164] [2020-10-16 10:54:07,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146475464] [2020-10-16 10:54:07,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:07,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 10:54:07,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:07,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:07,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:07,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:07,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:07,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:07,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853515180] [2020-10-16 10:54:07,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:07,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:07,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:07,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:07,292 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:08,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:08,007 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-16 10:54:08,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:54:08,008 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:08,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:08,008 INFO L225 Difference]: With dead ends: 127 [2020-10-16 10:54:08,009 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 10:54:08,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 10:54:08,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 10:54:08,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-16 10:54:08,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:08,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:08,011 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:08,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:08,012 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:08,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:08,012 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:08,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:08,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:08,012 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:08,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-16 10:54:08,213 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:08,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:08,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-16 10:54:08,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:08,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254317717] [2020-10-16 10:54:08,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:08,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254317717] [2020-10-16 10:54:08,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965675131] [2020-10-16 10:54:08,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:08,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:08,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:08,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:08,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:08,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647305539] [2020-10-16 10:54:08,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:08,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:08,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:08,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:08,565 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:09,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:09,224 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-16 10:54:09,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:54:09,225 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:09,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:09,225 INFO L225 Difference]: With dead ends: 124 [2020-10-16 10:54:09,225 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 10:54:09,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:54:09,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 10:54:09,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-16 10:54:09,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:09,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:09,228 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:09,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:09,228 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:09,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:09,229 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:09,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:09,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:09,229 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:09,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:09,430 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:09,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:09,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-16 10:54:09,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:09,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749308957] [2020-10-16 10:54:09,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:09,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749308957] [2020-10-16 10:54:09,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737555532] [2020-10-16 10:54:09,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:09,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:54:09,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:09,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:09,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:09,796 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:09,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:09,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:09,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306506407] [2020-10-16 10:54:09,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:09,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:09,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:09,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:09,811 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:10,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:10,603 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-16 10:54:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:54:10,603 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:10,604 INFO L225 Difference]: With dead ends: 123 [2020-10-16 10:54:10,604 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 10:54:10,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:54:10,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 10:54:10,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-16 10:54:10,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:10,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:10,606 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:10,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:10,606 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:10,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:10,607 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:10,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:10,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:10,607 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:10,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:10,808 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:10,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:10,808 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-16 10:54:10,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:10,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128623908] [2020-10-16 10:54:10,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:11,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128623908] [2020-10-16 10:54:11,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296616926] [2020-10-16 10:54:11,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:11,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:54:11,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:11,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:11,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:11,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:11,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:11,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610843940] [2020-10-16 10:54:11,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:11,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:11,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:11,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:11,141 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:11,856 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-16 10:54:11,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:54:11,856 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:11,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:11,857 INFO L225 Difference]: With dead ends: 120 [2020-10-16 10:54:11,857 INFO L226 Difference]: Without dead ends: 114 [2020-10-16 10:54:11,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 10:54:11,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-16 10:54:11,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-16 10:54:11,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:11,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:11,859 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:11,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:11,860 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:11,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:11,860 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:11,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:11,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:11,860 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:12,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:12,061 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:12,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:12,062 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-16 10:54:12,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:12,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308138596] [2020-10-16 10:54:12,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:12,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308138596] [2020-10-16 10:54:12,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250768421] [2020-10-16 10:54:12,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:12,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:54:12,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:12,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:12,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:12,406 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:12,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:12,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:12,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084272293] [2020-10-16 10:54:12,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:12,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:12,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:12,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:12,421 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:13,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:13,312 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-16 10:54:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:54:13,313 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:13,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:13,313 INFO L225 Difference]: With dead ends: 119 [2020-10-16 10:54:13,313 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 10:54:13,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 10:54:13,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 10:54:13,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-16 10:54:13,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:13,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:13,316 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:13,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:13,317 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:13,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:13,317 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:13,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:13,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:13,317 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:13,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:13,519 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:13,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:13,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-16 10:54:13,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:13,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699896078] [2020-10-16 10:54:13,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:13,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699896078] [2020-10-16 10:54:13,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020107608] [2020-10-16 10:54:13,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:13,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 10:54:13,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:13,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:13,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:13,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:13,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:13,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381722213] [2020-10-16 10:54:13,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:13,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:13,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:13,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:13,857 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:14,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:14,684 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-16 10:54:14,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:54:14,685 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:14,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:14,685 INFO L225 Difference]: With dead ends: 116 [2020-10-16 10:54:14,685 INFO L226 Difference]: Without dead ends: 110 [2020-10-16 10:54:14,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 10:54:14,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-16 10:54:14,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-16 10:54:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:14,688 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:14,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:14,688 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:14,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:14,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:14,688 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:14,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-16 10:54:14,889 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:14,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:14,890 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-16 10:54:14,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:14,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349394583] [2020-10-16 10:54:14,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:15,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349394583] [2020-10-16 10:54:15,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255532348] [2020-10-16 10:54:15,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:15,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 10:54:15,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:15,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:15,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:15,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:15,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:15,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:15,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715909298] [2020-10-16 10:54:15,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:15,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:15,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:15,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:15,246 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:16,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:16,248 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-16 10:54:16,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:54:16,248 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:16,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:16,249 INFO L225 Difference]: With dead ends: 115 [2020-10-16 10:54:16,249 INFO L226 Difference]: Without dead ends: 109 [2020-10-16 10:54:16,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 10:54:16,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-16 10:54:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-16 10:54:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:16,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:16,256 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:16,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:16,257 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:16,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:16,257 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:16,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:16,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:16,257 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:16,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:16,464 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:16,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:16,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-16 10:54:16,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:16,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098704695] [2020-10-16 10:54:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:16,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098704695] [2020-10-16 10:54:16,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565461646] [2020-10-16 10:54:16,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:16,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:16,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:16,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:16,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:16,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157515260] [2020-10-16 10:54:16,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:16,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:16,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:16,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:16,787 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:17,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:17,682 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-16 10:54:17,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 10:54:17,683 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:17,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:17,683 INFO L225 Difference]: With dead ends: 112 [2020-10-16 10:54:17,683 INFO L226 Difference]: Without dead ends: 106 [2020-10-16 10:54:17,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 10:54:17,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-16 10:54:17,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-16 10:54:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:17,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:17,686 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:17,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:17,686 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:17,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:17,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:17,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:17,686 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:17,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-16 10:54:17,887 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:17,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:17,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-16 10:54:17,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:17,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551810010] [2020-10-16 10:54:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:18,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551810010] [2020-10-16 10:54:18,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031630039] [2020-10-16 10:54:18,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:18,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:54:18,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:18,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:18,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:18,212 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:18,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:18,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:18,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129539885] [2020-10-16 10:54:18,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:18,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:18,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:18,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:18,229 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:19,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:19,334 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-16 10:54:19,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 10:54:19,335 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:19,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:19,335 INFO L225 Difference]: With dead ends: 111 [2020-10-16 10:54:19,336 INFO L226 Difference]: Without dead ends: 105 [2020-10-16 10:54:19,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 10:54:19,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-16 10:54:19,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-16 10:54:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:19,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:19,339 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:19,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:19,339 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:19,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:19,339 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:19,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:19,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:19,340 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:19,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-16 10:54:19,544 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:19,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:19,544 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-16 10:54:19,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:19,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672156022] [2020-10-16 10:54:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:19,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672156022] [2020-10-16 10:54:19,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153118311] [2020-10-16 10:54:19,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:19,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:54:19,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:19,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:19,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:19,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:19,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:19,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036203643] [2020-10-16 10:54:19,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:19,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:19,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:19,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:19,873 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:20,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:20,790 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-16 10:54:20,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:54:20,791 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:20,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:20,791 INFO L225 Difference]: With dead ends: 108 [2020-10-16 10:54:20,791 INFO L226 Difference]: Without dead ends: 102 [2020-10-16 10:54:20,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 10:54:20,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-16 10:54:20,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-16 10:54:20,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:20,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:20,793 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:20,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:20,794 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:20,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:20,794 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:20,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:20,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:20,794 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:20,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:21,000 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:21,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:21,000 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-16 10:54:21,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:21,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11956332] [2020-10-16 10:54:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:21,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11956332] [2020-10-16 10:54:21,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868032647] [2020-10-16 10:54:21,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:21,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:54:21,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:21,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:21,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:21,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:21,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:21,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:21,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433254192] [2020-10-16 10:54:21,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:21,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:21,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:21,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:21,342 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:22,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:22,532 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-16 10:54:22,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 10:54:22,532 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:22,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:22,533 INFO L225 Difference]: With dead ends: 107 [2020-10-16 10:54:22,533 INFO L226 Difference]: Without dead ends: 101 [2020-10-16 10:54:22,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 10:54:22,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-16 10:54:22,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-16 10:54:22,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:22,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:22,536 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:22,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:22,536 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:22,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:22,536 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:22,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:22,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:22,537 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:22,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:22,743 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:22,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:22,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-16 10:54:22,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:22,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757292207] [2020-10-16 10:54:22,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:23,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757292207] [2020-10-16 10:54:23,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704768527] [2020-10-16 10:54:23,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:23,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 10:54:23,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:23,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:23,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:23,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:23,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:23,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451137419] [2020-10-16 10:54:23,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:23,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:23,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:23,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:23,080 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:24,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:24,092 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-16 10:54:24,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 10:54:24,092 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:24,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:24,093 INFO L225 Difference]: With dead ends: 104 [2020-10-16 10:54:24,093 INFO L226 Difference]: Without dead ends: 98 [2020-10-16 10:54:24,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 10:54:24,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-16 10:54:24,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-16 10:54:24,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:24,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:24,096 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-16 10:54:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:24,096 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:24,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:24,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:24,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:24,097 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:24,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:24,298 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:24,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:24,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-16 10:54:24,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:24,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956058735] [2020-10-16 10:54:24,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:24,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956058735] [2020-10-16 10:54:24,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870213810] [2020-10-16 10:54:24,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:24,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 10:54:24,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:24,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:24,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:24,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:24,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:24,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:24,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584280438] [2020-10-16 10:54:24,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:24,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:24,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:24,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:24,651 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-16 10:54:25,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:25,950 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-16 10:54:25,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 10:54:25,950 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:25,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:25,950 INFO L225 Difference]: With dead ends: 103 [2020-10-16 10:54:25,951 INFO L226 Difference]: Without dead ends: 97 [2020-10-16 10:54:25,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 10:54:25,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-16 10:54:25,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-16 10:54:25,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:25,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:25,953 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-16 10:54:25,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:25,954 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:25,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:25,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:25,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:25,964 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:26,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-16 10:54:26,171 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:26,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:26,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-16 10:54:26,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:26,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812218589] [2020-10-16 10:54:26,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:26,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812218589] [2020-10-16 10:54:26,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652250585] [2020-10-16 10:54:26,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:26,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:26,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:26,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:26,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-16 10:54:26,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620571659] [2020-10-16 10:54:26,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-16 10:54:26,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:26,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-16 10:54:26,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-16 10:54:26,489 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-16 10:54:27,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:27,559 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-16 10:54:27,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 10:54:27,560 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-16 10:54:27,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:27,560 INFO L225 Difference]: With dead ends: 119 [2020-10-16 10:54:27,561 INFO L226 Difference]: Without dead ends: 113 [2020-10-16 10:54:27,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 10:54:27,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-16 10:54:27,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-16 10:54:27,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-16 10:54:27,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-16 10:54:27,563 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-16 10:54:27,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:27,563 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-16 10:54:27,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-16 10:54:27,563 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-16 10:54:27,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:27,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:27,563 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:27,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:27,764 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:27,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:27,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-16 10:54:27,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:27,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580664660] [2020-10-16 10:54:27,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:28,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580664660] [2020-10-16 10:54:28,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288741094] [2020-10-16 10:54:28,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:28,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:54:28,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:28,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:28,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:28,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:28,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:28,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:28,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502582559] [2020-10-16 10:54:28,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:28,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:28,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:28,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:28,101 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-16 10:54:29,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:29,442 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-16 10:54:29,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 10:54:29,443 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:29,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:29,443 INFO L225 Difference]: With dead ends: 100 [2020-10-16 10:54:29,444 INFO L226 Difference]: Without dead ends: 92 [2020-10-16 10:54:29,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 10:54:29,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-16 10:54:29,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-16 10:54:29,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-16 10:54:29,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-16 10:54:29,446 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-16 10:54:29,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:29,446 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-16 10:54:29,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:29,446 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-16 10:54:29,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-16 10:54:29,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:29,447 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:29,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:29,648 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:29,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:29,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-16 10:54:29,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:29,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985657093] [2020-10-16 10:54:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:29,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985657093] [2020-10-16 10:54:29,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128759792] [2020-10-16 10:54:29,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:29,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-16 10:54:29,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:29,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 10:54:29,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:29,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:54:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:29,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:29,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-16 10:54:29,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623832371] [2020-10-16 10:54:29,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:29,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:29,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:29,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:29,996 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-16 10:54:31,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:31,256 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-16 10:54:31,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 10:54:31,257 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-16 10:54:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:31,258 INFO L225 Difference]: With dead ends: 116 [2020-10-16 10:54:31,258 INFO L226 Difference]: Without dead ends: 111 [2020-10-16 10:54:31,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 10:54:31,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-16 10:54:31,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-16 10:54:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 10:54:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-16 10:54:31,260 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-16 10:54:31,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:31,260 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-16 10:54:31,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:31,261 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-16 10:54:31,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:31,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:31,261 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:31,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:31,462 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:31,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:31,462 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-16 10:54:31,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:31,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085884626] [2020-10-16 10:54:31,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:31,731 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:31,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085884626] [2020-10-16 10:54:31,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589776982] [2020-10-16 10:54:31,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:31,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:54:31,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:31,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:31,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:31,812 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 10:54:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:31,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:31,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:31,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161834121] [2020-10-16 10:54:31,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:31,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:31,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:31,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:31,836 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-16 10:54:33,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:33,179 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-16 10:54:33,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 10:54:33,180 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:54:33,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:33,181 INFO L225 Difference]: With dead ends: 96 [2020-10-16 10:54:33,181 INFO L226 Difference]: Without dead ends: 91 [2020-10-16 10:54:33,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-16 10:54:33,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-16 10:54:33,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-16 10:54:33,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-16 10:54:33,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-16 10:54:33,184 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-16 10:54:33,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:33,184 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-16 10:54:33,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:54:33,184 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-16 10:54:33,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:33,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:33,185 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:33,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:33,392 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:33,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:33,393 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-16 10:54:33,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:33,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34520389] [2020-10-16 10:54:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:33,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34520389] [2020-10-16 10:54:33,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387314138] [2020-10-16 10:54:33,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:33,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 10:54:33,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:33,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:33,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:33,798 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:33,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:33,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:54:33,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142208594] [2020-10-16 10:54:33,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:33,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:33,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:33,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:33,799 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-16 10:54:34,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:34,343 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-16 10:54:34,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 10:54:34,344 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:54:34,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:34,345 INFO L225 Difference]: With dead ends: 102 [2020-10-16 10:54:34,345 INFO L226 Difference]: Without dead ends: 96 [2020-10-16 10:54:34,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-16 10:54:34,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-16 10:54:34,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-16 10:54:34,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:54:34,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-16 10:54:34,347 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-16 10:54:34,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:34,347 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-16 10:54:34,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:34,347 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-16 10:54:34,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:34,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:34,348 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:34,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-16 10:54:34,548 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:34,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:34,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-16 10:54:34,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:34,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656033493] [2020-10-16 10:54:34,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:34,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656033493] [2020-10-16 10:54:34,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396141507] [2020-10-16 10:54:34,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:34,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 10:54:34,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:34,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:34,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:34,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:34,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:34,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:34,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446914722] [2020-10-16 10:54:34,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:34,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:34,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:34,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:34,992 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-16 10:54:35,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:35,619 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-16 10:54:35,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 10:54:35,619 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:54:35,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:35,619 INFO L225 Difference]: With dead ends: 122 [2020-10-16 10:54:35,620 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 10:54:35,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 10:54:35,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 10:54:35,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-16 10:54:35,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-16 10:54:35,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-16 10:54:35,622 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-16 10:54:35,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:35,622 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-16 10:54:35,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:54:35,622 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-16 10:54:35,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:35,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:35,623 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:35,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-16 10:54:35,824 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:35,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:35,825 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-16 10:54:35,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:35,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278954658] [2020-10-16 10:54:35,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:36,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278954658] [2020-10-16 10:54:36,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220627601] [2020-10-16 10:54:36,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:36,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:36,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:36,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:36,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:54:36,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732993246] [2020-10-16 10:54:36,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:36,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:36,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:36,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:36,229 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-16 10:54:36,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:36,874 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-16 10:54:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 10:54:36,875 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:54:36,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:36,875 INFO L225 Difference]: With dead ends: 123 [2020-10-16 10:54:36,876 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 10:54:36,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 10:54:36,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 10:54:36,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-16 10:54:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-16 10:54:36,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-16 10:54:36,878 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-16 10:54:36,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:36,878 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-16 10:54:36,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:36,879 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-16 10:54:36,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:36,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:36,879 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:37,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-16 10:54:37,080 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:37,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:37,080 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-16 10:54:37,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:37,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24706120] [2020-10-16 10:54:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:37,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24706120] [2020-10-16 10:54:37,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059034353] [2020-10-16 10:54:37,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:37,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:54:37,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:37,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:37,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:37,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:37,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:37,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:37,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001861311] [2020-10-16 10:54:37,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:37,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:37,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:37,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:37,507 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-16 10:54:38,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:38,199 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-16 10:54:38,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 10:54:38,199 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:54:38,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:38,200 INFO L225 Difference]: With dead ends: 139 [2020-10-16 10:54:38,200 INFO L226 Difference]: Without dead ends: 133 [2020-10-16 10:54:38,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-16 10:54:38,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-16 10:54:38,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-16 10:54:38,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-16 10:54:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-16 10:54:38,202 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-16 10:54:38,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:38,202 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-16 10:54:38,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:54:38,202 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-16 10:54:38,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:38,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:38,203 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:38,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-16 10:54:38,409 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:38,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:38,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-16 10:54:38,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:38,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308995916] [2020-10-16 10:54:38,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:38,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308995916] [2020-10-16 10:54:38,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714561761] [2020-10-16 10:54:38,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:38,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 10:54:38,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:38,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:38,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:38,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:38,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:54:38,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805336575] [2020-10-16 10:54:38,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:38,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:38,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:38,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:38,796 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-16 10:54:39,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:39,524 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-16 10:54:39,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 10:54:39,524 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:54:39,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:39,525 INFO L225 Difference]: With dead ends: 139 [2020-10-16 10:54:39,525 INFO L226 Difference]: Without dead ends: 133 [2020-10-16 10:54:39,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-16 10:54:39,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-16 10:54:39,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-16 10:54:39,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-16 10:54:39,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-16 10:54:39,527 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-16 10:54:39,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:39,527 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-16 10:54:39,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:39,528 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-16 10:54:39,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:39,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:39,528 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:39,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:39,729 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:39,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:39,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-16 10:54:39,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:39,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127191886] [2020-10-16 10:54:39,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:40,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127191886] [2020-10-16 10:54:40,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776004515] [2020-10-16 10:54:40,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:40,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:54:40,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:40,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:40,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:40,122 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:40,141 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:40,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:40,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:40,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763646785] [2020-10-16 10:54:40,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:40,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:40,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:40,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:40,143 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-16 10:54:40,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:40,950 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-16 10:54:40,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 10:54:40,951 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:54:40,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:40,951 INFO L225 Difference]: With dead ends: 136 [2020-10-16 10:54:40,951 INFO L226 Difference]: Without dead ends: 130 [2020-10-16 10:54:40,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 10:54:40,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-16 10:54:40,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-16 10:54:40,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-16 10:54:40,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-16 10:54:40,954 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-16 10:54:40,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:40,954 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-16 10:54:40,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:54:40,954 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-16 10:54:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:40,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:40,954 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:41,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-16 10:54:41,155 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:41,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:41,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-16 10:54:41,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:41,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164715846] [2020-10-16 10:54:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:41,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164715846] [2020-10-16 10:54:41,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352906524] [2020-10-16 10:54:41,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:41,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 10:54:41,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:41,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:41,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:41,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:41,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:54:41,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758179604] [2020-10-16 10:54:41,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:41,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:41,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:41,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:41,538 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-16 10:54:42,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:42,326 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-16 10:54:42,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 10:54:42,327 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:54:42,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:42,327 INFO L225 Difference]: With dead ends: 137 [2020-10-16 10:54:42,327 INFO L226 Difference]: Without dead ends: 131 [2020-10-16 10:54:42,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-16 10:54:42,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-16 10:54:42,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-16 10:54:42,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-16 10:54:42,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-16 10:54:42,330 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-16 10:54:42,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:42,330 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-16 10:54:42,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:42,331 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-16 10:54:42,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:42,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:42,331 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:42,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:42,532 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:42,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:42,532 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-16 10:54:42,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:42,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658329964] [2020-10-16 10:54:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:42,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658329964] [2020-10-16 10:54:42,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665098882] [2020-10-16 10:54:42,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:42,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 10:54:42,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:42,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:42,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:42,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:42,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:42,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:42,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794593498] [2020-10-16 10:54:42,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:42,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:42,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:42,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:42,945 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-16 10:54:43,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:43,848 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-16 10:54:43,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 10:54:43,848 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:54:43,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:43,849 INFO L225 Difference]: With dead ends: 134 [2020-10-16 10:54:43,849 INFO L226 Difference]: Without dead ends: 128 [2020-10-16 10:54:43,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-16 10:54:43,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-16 10:54:43,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-16 10:54:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-16 10:54:43,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-16 10:54:43,852 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-16 10:54:43,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:43,852 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-16 10:54:43,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:54:43,852 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-16 10:54:43,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:43,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:43,852 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:44,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-16 10:54:44,053 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:44,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:44,054 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-16 10:54:44,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:44,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106292730] [2020-10-16 10:54:44,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:44,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106292730] [2020-10-16 10:54:44,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730335007] [2020-10-16 10:54:44,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:44,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:44,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:44,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:44,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:54:44,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138745580] [2020-10-16 10:54:44,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:44,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:44,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:44,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:44,432 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-16 10:54:45,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:45,295 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-16 10:54:45,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 10:54:45,295 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:54:45,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:45,296 INFO L225 Difference]: With dead ends: 135 [2020-10-16 10:54:45,296 INFO L226 Difference]: Without dead ends: 129 [2020-10-16 10:54:45,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-16 10:54:45,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-16 10:54:45,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-16 10:54:45,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-16 10:54:45,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-16 10:54:45,298 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-16 10:54:45,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:45,298 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-16 10:54:45,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-16 10:54:45,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:45,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:45,299 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:45,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:45,500 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:45,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:45,500 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-16 10:54:45,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:45,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454389006] [2020-10-16 10:54:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:45,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454389006] [2020-10-16 10:54:45,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532129131] [2020-10-16 10:54:45,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:45,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:54:45,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:45,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:45,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:45,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:45,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:45,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:45,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695091639] [2020-10-16 10:54:45,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:45,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:45,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:45,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:45,892 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-16 10:54:46,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:46,897 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-16 10:54:46,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 10:54:46,897 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:54:46,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:46,898 INFO L225 Difference]: With dead ends: 132 [2020-10-16 10:54:46,898 INFO L226 Difference]: Without dead ends: 126 [2020-10-16 10:54:46,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-16 10:54:46,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-16 10:54:46,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-16 10:54:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-16 10:54:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-16 10:54:46,900 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-16 10:54:46,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:46,900 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-16 10:54:46,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:54:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-16 10:54:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:46,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:46,901 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:47,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:47,102 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:47,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:47,103 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-16 10:54:47,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:47,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936295829] [2020-10-16 10:54:47,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:47,394 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:47,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936295829] [2020-10-16 10:54:47,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154385416] [2020-10-16 10:54:47,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:47,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 10:54:47,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:47,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:47,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:47,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:47,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:54:47,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423437230] [2020-10-16 10:54:47,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:47,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:47,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:47,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:47,468 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-16 10:54:48,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:48,392 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-16 10:54:48,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 10:54:48,393 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:54:48,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:48,393 INFO L225 Difference]: With dead ends: 133 [2020-10-16 10:54:48,393 INFO L226 Difference]: Without dead ends: 127 [2020-10-16 10:54:48,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-16 10:54:48,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-16 10:54:48,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-16 10:54:48,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-16 10:54:48,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-16 10:54:48,396 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-16 10:54:48,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:48,396 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-16 10:54:48,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:48,396 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-16 10:54:48,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:48,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:48,396 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:48,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:48,597 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:48,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:48,598 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-16 10:54:48,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:48,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577106518] [2020-10-16 10:54:48,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:48,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577106518] [2020-10-16 10:54:48,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317701632] [2020-10-16 10:54:48,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:48,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:54:48,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:48,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:48,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:48,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:48,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:48,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:48,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516809003] [2020-10-16 10:54:48,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:48,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:48,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:48,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:48,986 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-16 10:54:50,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:50,078 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-16 10:54:50,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 10:54:50,079 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:54:50,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:50,079 INFO L225 Difference]: With dead ends: 130 [2020-10-16 10:54:50,079 INFO L226 Difference]: Without dead ends: 124 [2020-10-16 10:54:50,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-16 10:54:50,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-16 10:54:50,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-16 10:54:50,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 10:54:50,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-16 10:54:50,082 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-16 10:54:50,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:50,082 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-16 10:54:50,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:54:50,082 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-16 10:54:50,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:50,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:50,082 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:50,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:50,283 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:50,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:50,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-16 10:54:50,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:50,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582774360] [2020-10-16 10:54:50,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:50,576 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:50,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582774360] [2020-10-16 10:54:50,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193250607] [2020-10-16 10:54:50,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:50,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 10:54:50,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:50,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:50,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:50,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:50,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:54:50,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632268143] [2020-10-16 10:54:50,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:50,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:50,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:50,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:50,650 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-16 10:54:51,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:51,632 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-16 10:54:51,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-16 10:54:51,632 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:54:51,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:51,633 INFO L225 Difference]: With dead ends: 131 [2020-10-16 10:54:51,633 INFO L226 Difference]: Without dead ends: 125 [2020-10-16 10:54:51,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-16 10:54:51,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-16 10:54:51,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-16 10:54:51,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-16 10:54:51,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-16 10:54:51,635 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-16 10:54:51,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:51,636 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-16 10:54:51,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:51,636 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-16 10:54:51,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:51,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:51,636 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:51,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-16 10:54:51,837 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:51,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:51,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-16 10:54:51,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:51,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112293180] [2020-10-16 10:54:51,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:52,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112293180] [2020-10-16 10:54:52,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245317773] [2020-10-16 10:54:52,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:52,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 10:54:52,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:52,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:52,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:52,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:52,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:52,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:52,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785975159] [2020-10-16 10:54:52,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:52,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:52,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:52,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:52,226 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-16 10:54:53,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:53,423 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-16 10:54:53,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 10:54:53,424 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:54:53,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:53,424 INFO L225 Difference]: With dead ends: 128 [2020-10-16 10:54:53,424 INFO L226 Difference]: Without dead ends: 122 [2020-10-16 10:54:53,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-16 10:54:53,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-16 10:54:53,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-16 10:54:53,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-16 10:54:53,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-16 10:54:53,426 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-16 10:54:53,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:53,427 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-16 10:54:53,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:54:53,427 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-16 10:54:53,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:53,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:53,427 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:53,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-16 10:54:53,628 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:53,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:53,629 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-16 10:54:53,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:53,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186076339] [2020-10-16 10:54:53,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:53,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186076339] [2020-10-16 10:54:53,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761898962] [2020-10-16 10:54:53,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:53,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:53,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:53,977 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:53,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:53,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:54:53,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21948425] [2020-10-16 10:54:53,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:53,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:53,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:53,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:53,979 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-16 10:54:55,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:55,027 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-16 10:54:55,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 10:54:55,028 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:54:55,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:55,028 INFO L225 Difference]: With dead ends: 129 [2020-10-16 10:54:55,028 INFO L226 Difference]: Without dead ends: 123 [2020-10-16 10:54:55,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 10:54:55,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-16 10:54:55,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-16 10:54:55,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-16 10:54:55,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-16 10:54:55,031 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-16 10:54:55,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:55,031 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-16 10:54:55,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:55,031 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-16 10:54:55,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:55,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:55,031 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:55,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-16 10:54:55,232 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:55,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:55,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-16 10:54:55,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:55,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837708928] [2020-10-16 10:54:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:55,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837708928] [2020-10-16 10:54:55,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235252195] [2020-10-16 10:54:55,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:55,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 10:54:55,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:55,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:55,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:55,583 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:55,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:55,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:55,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492268335] [2020-10-16 10:54:55,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:55,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:55,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:55,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:55,602 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-16 10:54:56,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:56,952 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-16 10:54:56,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-16 10:54:56,953 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:54:56,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:56,953 INFO L225 Difference]: With dead ends: 126 [2020-10-16 10:54:56,953 INFO L226 Difference]: Without dead ends: 120 [2020-10-16 10:54:56,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-16 10:54:56,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-16 10:54:56,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-16 10:54:56,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-16 10:54:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-16 10:54:56,956 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-16 10:54:56,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:56,956 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-16 10:54:56,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:54:56,957 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-16 10:54:56,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:56,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:56,957 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:57,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-16 10:54:57,158 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:57,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:57,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-16 10:54:57,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:57,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481147822] [2020-10-16 10:54:57,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:57,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481147822] [2020-10-16 10:54:57,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026619494] [2020-10-16 10:54:57,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:57,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-16 10:54:57,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:57,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:57,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:57,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:57,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:54:57,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966939002] [2020-10-16 10:54:57,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:54:57,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:57,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:54:57,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:54:57,535 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-16 10:54:58,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:54:58,672 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-16 10:54:58,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-16 10:54:58,673 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:54:58,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:54:58,673 INFO L225 Difference]: With dead ends: 127 [2020-10-16 10:54:58,673 INFO L226 Difference]: Without dead ends: 121 [2020-10-16 10:54:58,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-16 10:54:58,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-16 10:54:58,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-16 10:54:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-16 10:54:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-16 10:54:58,675 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-16 10:54:58,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:54:58,676 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-16 10:54:58,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:54:58,676 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-16 10:54:58,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:54:58,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:54:58,676 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:54:58,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:54:58,877 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:54:58,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:54:58,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-16 10:54:58,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:54:58,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675867235] [2020-10-16 10:54:58,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:54:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:54:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:59,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675867235] [2020-10-16 10:54:59,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524167789] [2020-10-16 10:54:59,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:54:59,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 10:54:59,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:54:59,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:54:59,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:54:59,236 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:54:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:54:59,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:54:59,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:54:59,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963624423] [2020-10-16 10:54:59,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:54:59,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:54:59,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:54:59,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:54:59,255 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-16 10:55:00,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:00,651 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-16 10:55:00,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-16 10:55:00,651 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:55:00,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:00,652 INFO L225 Difference]: With dead ends: 124 [2020-10-16 10:55:00,652 INFO L226 Difference]: Without dead ends: 118 [2020-10-16 10:55:00,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-16 10:55:00,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-16 10:55:00,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-16 10:55:00,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-16 10:55:00,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-16 10:55:00,654 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-16 10:55:00,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:00,655 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-16 10:55:00,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:00,655 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-16 10:55:00,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:55:00,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:00,655 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:00,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-16 10:55:00,856 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:00,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:00,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-16 10:55:00,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:00,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819866377] [2020-10-16 10:55:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:01,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819866377] [2020-10-16 10:55:01,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521177322] [2020-10-16 10:55:01,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:55:01,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-16 10:55:01,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:01,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:55:01,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:01,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:01,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-16 10:55:01,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639693492] [2020-10-16 10:55:01,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 10:55:01,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:01,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 10:55:01,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-16 10:55:01,215 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-16 10:55:02,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:02,416 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-16 10:55:02,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-16 10:55:02,417 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-16 10:55:02,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:02,417 INFO L225 Difference]: With dead ends: 144 [2020-10-16 10:55:02,417 INFO L226 Difference]: Without dead ends: 138 [2020-10-16 10:55:02,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-16 10:55:02,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-16 10:55:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-16 10:55:02,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-16 10:55:02,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-16 10:55:02,420 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-16 10:55:02,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:02,421 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-16 10:55:02,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 10:55:02,421 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-16 10:55:02,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 10:55:02,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:02,421 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:02,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 10:55:02,622 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:02,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:02,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-16 10:55:02,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:02,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389630495] [2020-10-16 10:55:02,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 10:55:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:02,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389630495] [2020-10-16 10:55:02,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134205281] [2020-10-16 10:55:02,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 10:55:02,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-16 10:55:02,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 10:55:02,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-16 10:55:02,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 10:55:02,990 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 10:55:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 10:55:03,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 10:55:03,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-16 10:55:03,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715160057] [2020-10-16 10:55:03,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-16 10:55:03,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 10:55:03,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-16 10:55:03,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-16 10:55:03,010 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-16 10:55:04,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 10:55:04,457 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-16 10:55:04,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-16 10:55:04,458 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-16 10:55:04,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 10:55:04,459 INFO L225 Difference]: With dead ends: 125 [2020-10-16 10:55:04,459 INFO L226 Difference]: Without dead ends: 117 [2020-10-16 10:55:04,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-16 10:55:04,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-16 10:55:04,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-16 10:55:04,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-16 10:55:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-16 10:55:04,461 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-16 10:55:04,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 10:55:04,461 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-16 10:55:04,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-16 10:55:04,462 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-16 10:55:04,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-16 10:55:04,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 10:55:04,462 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 10:55:04,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-16 10:55:04,663 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 10:55:04,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 10:55:04,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-16 10:55:04,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 10:55:04,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251599218] [2020-10-16 10:55:04,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 10:55:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 10:55:04,671 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 10:55:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 10:55:04,685 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 10:55:04,738 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 10:55:04,738 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 10:55:04,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2020-10-16 10:55:04,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 10:55:04 BasicIcfg [2020-10-16 10:55:04,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 10:55:04,805 INFO L168 Benchmark]: Toolchain (without parser) took 223550.35 ms. Allocated memory was 139.5 MB in the beginning and 218.6 MB in the end (delta: 79.2 MB). Free memory was 100.8 MB in the beginning and 64.1 MB in the end (delta: 36.7 MB). Peak memory consumption was 115.8 MB. Max. memory is 7.1 GB. [2020-10-16 10:55:04,806 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-16 10:55:04,806 INFO L168 Benchmark]: CACSL2BoogieTranslator took 721.58 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 100.6 MB in the beginning and 163.5 MB in the end (delta: -62.9 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-10-16 10:55:04,807 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.30 ms. Allocated memory is still 203.9 MB. Free memory was 163.5 MB in the beginning and 161.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-16 10:55:04,807 INFO L168 Benchmark]: Boogie Preprocessor took 26.55 ms. Allocated memory is still 203.9 MB. Free memory was 161.5 MB in the beginning and 160.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-16 10:55:04,807 INFO L168 Benchmark]: RCFGBuilder took 350.04 ms. Allocated memory is still 203.9 MB. Free memory was 160.1 MB in the beginning and 139.4 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-10-16 10:55:04,808 INFO L168 Benchmark]: TraceAbstraction took 222405.23 ms. Allocated memory was 203.9 MB in the beginning and 218.6 MB in the end (delta: 14.7 MB). Free memory was 138.8 MB in the beginning and 64.1 MB in the end (delta: 74.7 MB). Peak memory consumption was 89.3 MB. Max. memory is 7.1 GB. [2020-10-16 10:55:04,810 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 721.58 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 100.6 MB in the beginning and 163.5 MB in the end (delta: -62.9 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.30 ms. Allocated memory is still 203.9 MB. Free memory was 163.5 MB in the beginning and 161.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.55 ms. Allocated memory is still 203.9 MB. Free memory was 161.5 MB in the beginning and 160.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 350.04 ms. Allocated memory is still 203.9 MB. Free memory was 160.1 MB in the beginning and 139.4 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 222405.23 ms. Allocated memory was 203.9 MB in the beginning and 218.6 MB in the end (delta: 14.7 MB). Free memory was 138.8 MB in the beginning and 64.1 MB in the end (delta: 74.7 MB). Peak memory consumption was 89.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 618 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; [L693] 0 pthread_t id1, id2; [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L697] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, k=6] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L700] 0 int condJ = j >= (2*10 +6); [L702] COND TRUE 0 condI || condJ [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 222.2s, OverallIterations: 219, TraceHistogramMax: 10, AutomataDifference: 122.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 3496 SDtfs, 12305 SDslu, 22147 SDs, 0 SdLazy, 24060 SolverSat, 13833 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11878 GetRequests, 3914 SyntacticMatches, 213 SemanticMatches, 7751 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75950 ImplicationChecksByTransitivity, 125.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 218 MinimizatonAttempts, 5507 StatesRemovedByMinimization, 217 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.5s SsaConstructionTime, 4.6s SatisfiabilityAnalysisTime, 41.3s InterpolantComputationTime, 8982 NumberOfCodeBlocks, 8982 NumberOfCodeBlocksAsserted, 1118 NumberOfCheckSat, 8523 ConstructedInterpolants, 0 QuantifiedInterpolants, 805507 SizeOfPredicates, 2751 NumberOfNonLiveVariables, 27387 ConjunctsInSsa, 3605 ConjunctsInUnsatCore, 431 InterpolantComputations, 5 PerfectInterpolantSequences, 0/17250 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 proved your program to be incorrect! Received shutdown request...