/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/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-1d1d2b5 [2020-10-21 21:29:25,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-21 21:29:25,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-21 21:29:25,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-21 21:29:25,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-21 21:29:25,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-21 21:29:25,065 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-21 21:29:25,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-21 21:29:25,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-21 21:29:25,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-21 21:29:25,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-21 21:29:25,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-21 21:29:25,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-21 21:29:25,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-21 21:29:25,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-21 21:29:25,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-21 21:29:25,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-21 21:29:25,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-21 21:29:25,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-21 21:29:25,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-21 21:29:25,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-21 21:29:25,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-21 21:29:25,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-21 21:29:25,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-21 21:29:25,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-21 21:29:25,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-21 21:29:25,109 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-21 21:29:25,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-21 21:29:25,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-21 21:29:25,114 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-21 21:29:25,114 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-21 21:29:25,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-21 21:29:25,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-21 21:29:25,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-21 21:29:25,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-21 21:29:25,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-21 21:29:25,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-21 21:29:25,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-21 21:29:25,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-21 21:29:25,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-21 21:29:25,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-21 21:29:25,124 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-21 21:29:25,168 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-21 21:29:25,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-21 21:29:25,170 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-21 21:29:25,170 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-21 21:29:25,170 INFO L138 SettingsManager]: * Use SBE=true [2020-10-21 21:29:25,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-21 21:29:25,171 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-21 21:29:25,172 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-21 21:29:25,172 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-21 21:29:25,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-21 21:29:25,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-21 21:29:25,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-21 21:29:25,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-21 21:29:25,174 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-21 21:29:25,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-21 21:29:25,174 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-21 21:29:25,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-21 21:29:25,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-21 21:29:25,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-21 21:29:25,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-21 21:29:25,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-21 21:29:25,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 21:29:25,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-21 21:29:25,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-21 21:29:25,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-21 21:29:25,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-21 21:29:25,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-21 21:29:25,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-21 21:29:25,177 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-21 21:29:25,177 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-21 21:29:25,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-21 21:29:25,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-21 21:29:25,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-21 21:29:25,547 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-21 21:29:25,547 INFO L275 PluginConnector]: CDTParser initialized [2020-10-21 21:29:25,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-10-21 21:29:25,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e572fe11d/b2a053b0b44f453492049122a92c3192/FLAGd1929a2a9 [2020-10-21 21:29:26,148 INFO L306 CDTParser]: Found 1 translation units. [2020-10-21 21:29:26,148 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-10-21 21:29:26,166 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e572fe11d/b2a053b0b44f453492049122a92c3192/FLAGd1929a2a9 [2020-10-21 21:29:26,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e572fe11d/b2a053b0b44f453492049122a92c3192 [2020-10-21 21:29:26,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-21 21:29:26,456 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-21 21:29:26,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-21 21:29:26,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-21 21:29:26,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-21 21:29:26,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 09:29:26" (1/1) ... [2020-10-21 21:29:26,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@416d8997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:26, skipping insertion in model container [2020-10-21 21:29:26,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 09:29:26" (1/1) ... [2020-10-21 21:29:26,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-21 21:29:26,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-21 21:29:27,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 21:29:27,022 INFO L203 MainTranslator]: Completed pre-run [2020-10-21 21:29:27,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 21:29:27,183 INFO L208 MainTranslator]: Completed translation [2020-10-21 21:29:27,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27 WrapperNode [2020-10-21 21:29:27,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-21 21:29:27,186 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-21 21:29:27,186 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-21 21:29:27,186 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-21 21:29:27,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (1/1) ... [2020-10-21 21:29:27,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (1/1) ... [2020-10-21 21:29:27,233 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-21 21:29:27,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-21 21:29:27,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-21 21:29:27,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-21 21:29:27,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (1/1) ... [2020-10-21 21:29:27,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (1/1) ... [2020-10-21 21:29:27,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (1/1) ... [2020-10-21 21:29:27,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (1/1) ... [2020-10-21 21:29:27,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (1/1) ... [2020-10-21 21:29:27,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (1/1) ... [2020-10-21 21:29:27,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (1/1) ... [2020-10-21 21:29:27,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-21 21:29:27,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-21 21:29:27,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-21 21:29:27,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-21 21:29:27,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 21:29:27,343 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-21 21:29:27,343 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-21 21:29:27,343 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-21 21:29:27,343 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-21 21:29:27,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-21 21:29:27,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-21 21:29:27,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-21 21:29:27,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-21 21:29:27,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-21 21:29:27,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-21 21:29:27,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-21 21:29:27,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-21 21:29:27,347 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-21 21:29:27,708 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-21 21:29:27,709 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-21 21:29:27,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 09:29:27 BoogieIcfgContainer [2020-10-21 21:29:27,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-21 21:29:27,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-21 21:29:27,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-21 21:29:27,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-21 21:29:27,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 09:29:26" (1/3) ... [2020-10-21 21:29:27,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d9a6d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 09:29:27, skipping insertion in model container [2020-10-21 21:29:27,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 09:29:27" (2/3) ... [2020-10-21 21:29:27,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d9a6d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 09:29:27, skipping insertion in model container [2020-10-21 21:29:27,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 09:29:27" (3/3) ... [2020-10-21 21:29:27,722 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2020-10-21 21:29:27,741 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-21 21:29:27,741 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-21 21:29:27,749 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-21 21:29:27,750 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-21 21:29:27,780 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,780 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,781 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,781 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,781 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,782 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,782 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,782 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,783 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,783 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,783 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,783 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,784 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,784 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,784 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,785 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,785 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,785 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,785 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,786 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,786 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,786 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,787 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,787 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,787 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,788 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,788 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,788 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,788 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,789 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,792 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,793 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,793 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,793 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,794 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,794 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,807 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,808 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,808 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,808 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,808 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,809 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 21:29:27,815 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-21 21:29:27,830 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-21 21:29:27,856 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-21 21:29:27,856 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-21 21:29:27,856 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-21 21:29:27,856 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-21 21:29:27,857 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-21 21:29:27,857 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-21 21:29:27,857 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-21 21:29:27,857 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-21 21:29:27,871 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-21 21:29:27,874 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 66 transitions, 142 flow [2020-10-21 21:29:27,877 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 66 transitions, 142 flow [2020-10-21 21:29:27,880 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 67 places, 66 transitions, 142 flow [2020-10-21 21:29:27,924 INFO L129 PetriNetUnfolder]: 6/64 cut-off events. [2020-10-21 21:29:27,924 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-21 21:29:27,930 INFO L80 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 109 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2020-10-21 21:29:27,933 INFO L116 LiptonReduction]: Number of co-enabled transitions 1272 [2020-10-21 21:29:29,680 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-21 21:29:29,801 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-21 21:29:29,815 INFO L131 LiptonReduction]: Checked pairs total: 1215 [2020-10-21 21:29:29,816 INFO L133 LiptonReduction]: Total number of compositions: 63 [2020-10-21 21:29:29,823 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-21 21:29:29,835 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-21 21:29:29,837 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-21 21:29:29,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-21 21:29:29,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:29,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-21 21:29:29,846 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:29,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:29,852 INFO L82 PathProgramCache]: Analyzing trace with hash -485169148, now seen corresponding path program 1 times [2020-10-21 21:29:29,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:29,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746343923] [2020-10-21 21:29:29,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:30,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746343923] [2020-10-21 21:29:30,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:29:30,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-21 21:29:30,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074714814] [2020-10-21 21:29:30,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-21 21:29:30,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:30,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-21 21:29:30,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-21 21:29:30,103 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-21 21:29:30,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:30,193 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-21 21:29:30,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-21 21:29:30,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-21 21:29:30,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:30,219 INFO L225 Difference]: With dead ends: 83 [2020-10-21 21:29:30,219 INFO L226 Difference]: Without dead ends: 54 [2020-10-21 21:29:30,221 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 [2020-10-21 21:29:30,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-21 21:29:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-21 21:29:30,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-21 21:29:30,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-21 21:29:30,286 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-21 21:29:30,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:30,286 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-21 21:29:30,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-21 21:29:30,287 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-21 21:29:30,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 21:29:30,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:30,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:30,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-21 21:29:30,289 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:30,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:30,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1939234589, now seen corresponding path program 1 times [2020-10-21 21:29:30,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:30,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789095883] [2020-10-21 21:29:30,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:30,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789095883] [2020-10-21 21:29:30,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:29:30,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 21:29:30,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587179308] [2020-10-21 21:29:30,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-21 21:29:30,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:30,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-21 21:29:30,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-21 21:29:30,379 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-21 21:29:30,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:30,431 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-21 21:29:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 21:29:30,432 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-21 21:29:30,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:30,434 INFO L225 Difference]: With dead ends: 80 [2020-10-21 21:29:30,434 INFO L226 Difference]: Without dead ends: 75 [2020-10-21 21:29:30,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-21 21:29:30,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-21 21:29:30,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-21 21:29:30,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-21 21:29:30,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-21 21:29:30,446 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-21 21:29:30,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:30,447 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-21 21:29:30,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-21 21:29:30,447 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-21 21:29:30,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 21:29:30,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:30,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:30,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-21 21:29:30,449 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:30,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:30,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1904484586, now seen corresponding path program 1 times [2020-10-21 21:29:30,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:30,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580106479] [2020-10-21 21:29:30,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:30,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580106479] [2020-10-21 21:29:30,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:29:30,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 21:29:30,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366898957] [2020-10-21 21:29:30,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-21 21:29:30,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:30,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-21 21:29:30,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-21 21:29:30,549 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-21 21:29:30,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:30,618 INFO L93 Difference]: Finished difference Result 83 states and 196 transitions. [2020-10-21 21:29:30,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 21:29:30,620 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-21 21:29:30,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:30,621 INFO L225 Difference]: With dead ends: 83 [2020-10-21 21:29:30,622 INFO L226 Difference]: Without dead ends: 77 [2020-10-21 21:29:30,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-21 21:29:30,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-21 21:29:30,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-10-21 21:29:30,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-21 21:29:30,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-21 21:29:30,632 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-21 21:29:30,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:30,633 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-21 21:29:30,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-21 21:29:30,633 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-21 21:29:30,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-21 21:29:30,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:30,634 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:30,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-21 21:29:30,635 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:30,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:30,635 INFO L82 PathProgramCache]: Analyzing trace with hash 13298082, now seen corresponding path program 2 times [2020-10-21 21:29:30,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:30,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130649537] [2020-10-21 21:29:30,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:30,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130649537] [2020-10-21 21:29:30,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308585730] [2020-10-21 21:29:30,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:30,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:29:30,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:30,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 21:29:30,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:30,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:30,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:30,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-21 21:29:30,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080566307] [2020-10-21 21:29:30,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 21:29:30,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:30,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 21:29:30,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-21 21:29:30,923 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-21 21:29:31,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:31,019 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-21 21:29:31,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 21:29:31,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-21 21:29:31,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:31,022 INFO L225 Difference]: With dead ends: 101 [2020-10-21 21:29:31,022 INFO L226 Difference]: Without dead ends: 96 [2020-10-21 21:29:31,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:29:31,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-21 21:29:31,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-21 21:29:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-21 21:29:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-21 21:29:31,033 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-21 21:29:31,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:31,034 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-21 21:29:31,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 21:29:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-21 21:29:31,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-21 21:29:31,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:31,035 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:31,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:31,250 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:31,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:31,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1090495625, now seen corresponding path program 2 times [2020-10-21 21:29:31,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:31,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555589136] [2020-10-21 21:29:31,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:31,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555589136] [2020-10-21 21:29:31,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765766749] [2020-10-21 21:29:31,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:29:31,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:29:31,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:31,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 21:29:31,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:31,475 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:29:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:31,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:31,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-21 21:29:31,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703135521] [2020-10-21 21:29:31,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 21:29:31,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:31,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 21:29:31,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:29:31,489 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-21 21:29:31,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:31,578 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-21 21:29:31,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 21:29:31,579 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-21 21:29:31,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:31,580 INFO L225 Difference]: With dead ends: 96 [2020-10-21 21:29:31,580 INFO L226 Difference]: Without dead ends: 90 [2020-10-21 21:29:31,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-21 21:29:31,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-21 21:29:31,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-10-21 21:29:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-21 21:29:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-21 21:29:31,590 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-21 21:29:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:31,591 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-21 21:29:31,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 21:29:31,591 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-21 21:29:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:29:31,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:31,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:31,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:31,806 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:31,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:31,807 INFO L82 PathProgramCache]: Analyzing trace with hash 402914365, now seen corresponding path program 1 times [2020-10-21 21:29:31,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:31,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719888686] [2020-10-21 21:29:31,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:31,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719888686] [2020-10-21 21:29:31,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:29:31,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 21:29:31,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618472306] [2020-10-21 21:29:31,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 21:29:31,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:31,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 21:29:31,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-21 21:29:31,863 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-21 21:29:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:31,928 INFO L93 Difference]: Finished difference Result 103 states and 242 transitions. [2020-10-21 21:29:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 21:29:31,928 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 21:29:31,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:31,929 INFO L225 Difference]: With dead ends: 103 [2020-10-21 21:29:31,929 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 21:29:31,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:29:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 21:29:31,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-10-21 21:29:31,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-21 21:29:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-10-21 21:29:31,938 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 10 [2020-10-21 21:29:31,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:31,938 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-10-21 21:29:31,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 21:29:31,938 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-10-21 21:29:31,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:29:31,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:31,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:31,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-21 21:29:31,940 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:31,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:31,940 INFO L82 PathProgramCache]: Analyzing trace with hash 403029685, now seen corresponding path program 2 times [2020-10-21 21:29:31,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:31,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467966205] [2020-10-21 21:29:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:32,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467966205] [2020-10-21 21:29:32,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 21:29:32,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 21:29:32,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488682405] [2020-10-21 21:29:32,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 21:29:32,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:32,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 21:29:32,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-21 21:29:32,017 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 6 states. [2020-10-21 21:29:32,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:32,099 INFO L93 Difference]: Finished difference Result 103 states and 242 transitions. [2020-10-21 21:29:32,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 21:29:32,099 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 21:29:32,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:32,100 INFO L225 Difference]: With dead ends: 103 [2020-10-21 21:29:32,101 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 21:29:32,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-21 21:29:32,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 21:29:32,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-10-21 21:29:32,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-21 21:29:32,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-21 21:29:32,110 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-21 21:29:32,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:32,110 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-21 21:29:32,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 21:29:32,111 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-21 21:29:32,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:29:32,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:32,112 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:32,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-21 21:29:32,112 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:32,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:32,113 INFO L82 PathProgramCache]: Analyzing trace with hash 412268739, now seen corresponding path program 3 times [2020-10-21 21:29:32,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:32,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087908146] [2020-10-21 21:29:32,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:32,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087908146] [2020-10-21 21:29:32,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929347579] [2020-10-21 21:29:32,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:29:32,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 21:29:32,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:32,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:32,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:32,304 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:32,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:32,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:32,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-21 21:29:32,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020192689] [2020-10-21 21:29:32,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 21:29:32,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:32,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 21:29:32,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-21 21:29:32,327 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-21 21:29:32,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:32,424 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-21 21:29:32,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:29:32,425 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-21 21:29:32,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:32,426 INFO L225 Difference]: With dead ends: 122 [2020-10-21 21:29:32,426 INFO L226 Difference]: Without dead ends: 117 [2020-10-21 21:29:32,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-21 21:29:32,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-21 21:29:32,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-21 21:29:32,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-21 21:29:32,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-21 21:29:32,435 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-21 21:29:32,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:32,435 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-21 21:29:32,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 21:29:32,435 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-21 21:29:32,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 21:29:32,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:32,437 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:32,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:32,651 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:32,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:32,652 INFO L82 PathProgramCache]: Analyzing trace with hash 554398346, now seen corresponding path program 3 times [2020-10-21 21:29:32,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:32,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470553631] [2020-10-21 21:29:32,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:32,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:32,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470553631] [2020-10-21 21:29:32,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613530806] [2020-10-21 21:29:32,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:29:32,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 21:29:32,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:32,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:32,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:32,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:29:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:32,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:32,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 21:29:32,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15091681] [2020-10-21 21:29:32,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:29:32,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:32,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:29:32,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:29:32,867 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-21 21:29:32,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:32,993 INFO L93 Difference]: Finished difference Result 121 states and 288 transitions. [2020-10-21 21:29:32,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:29:32,994 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-21 21:29:32,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:32,996 INFO L225 Difference]: With dead ends: 121 [2020-10-21 21:29:32,996 INFO L226 Difference]: Without dead ends: 115 [2020-10-21 21:29:32,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:29:32,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-21 21:29:33,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 94. [2020-10-21 21:29:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-21 21:29:33,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-21 21:29:33,004 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-21 21:29:33,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:33,004 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-21 21:29:33,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:29:33,004 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-21 21:29:33,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:33,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:33,006 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:33,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:33,221 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:33,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:33,222 INFO L82 PathProgramCache]: Analyzing trace with hash -394647540, now seen corresponding path program 3 times [2020-10-21 21:29:33,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:33,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642154825] [2020-10-21 21:29:33,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:33,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:33,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642154825] [2020-10-21 21:29:33,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282457273] [2020-10-21 21:29:33,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:33,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 21:29:33,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:33,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:33,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:33,468 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:33,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:33,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 21:29:33,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706877182] [2020-10-21 21:29:33,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:29:33,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:33,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:29:33,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:29:33,482 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-21 21:29:33,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:33,671 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2020-10-21 21:29:33,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:29:33,672 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 21:29:33,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:33,674 INFO L225 Difference]: With dead ends: 121 [2020-10-21 21:29:33,674 INFO L226 Difference]: Without dead ends: 116 [2020-10-21 21:29:33,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:29:33,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-21 21:29:33,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 94. [2020-10-21 21:29:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-21 21:29:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-21 21:29:33,681 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 11 [2020-10-21 21:29:33,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:33,681 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-21 21:29:33,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:29:33,681 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-21 21:29:33,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:33,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:33,682 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:33,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-21 21:29:33,897 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:33,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:33,898 INFO L82 PathProgramCache]: Analyzing trace with hash -394532220, now seen corresponding path program 4 times [2020-10-21 21:29:33,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:33,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889610478] [2020-10-21 21:29:33,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:33,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889610478] [2020-10-21 21:29:33,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810234093] [2020-10-21 21:29:33,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:29:34,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:29:34,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:34,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:34,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:34,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:29:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:34,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:34,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 21:29:34,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509861000] [2020-10-21 21:29:34,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:29:34,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:34,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:29:34,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:29:34,092 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-21 21:29:34,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:34,313 INFO L93 Difference]: Finished difference Result 131 states and 313 transitions. [2020-10-21 21:29:34,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:29:34,314 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 21:29:34,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:34,315 INFO L225 Difference]: With dead ends: 131 [2020-10-21 21:29:34,315 INFO L226 Difference]: Without dead ends: 126 [2020-10-21 21:29:34,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-21 21:29:34,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-21 21:29:34,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 95. [2020-10-21 21:29:34,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 21:29:34,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 237 transitions. [2020-10-21 21:29:34,321 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 237 transitions. Word has length 11 [2020-10-21 21:29:34,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:34,322 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 237 transitions. [2020-10-21 21:29:34,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:29:34,322 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 237 transitions. [2020-10-21 21:29:34,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:34,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:34,323 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:34,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:34,533 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:34,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:34,534 INFO L82 PathProgramCache]: Analyzing trace with hash -394528376, now seen corresponding path program 5 times [2020-10-21 21:29:34,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:34,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248019515] [2020-10-21 21:29:34,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:34,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248019515] [2020-10-21 21:29:34,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516292645] [2020-10-21 21:29:34,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:29:34,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:29:34,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:34,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:34,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:34,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:34,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:34,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 21:29:34,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350186260] [2020-10-21 21:29:34,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:29:34,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:34,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:29:34,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:29:34,716 INFO L87 Difference]: Start difference. First operand 95 states and 237 transitions. Second operand 11 states. [2020-10-21 21:29:34,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:34,843 INFO L93 Difference]: Finished difference Result 126 states and 297 transitions. [2020-10-21 21:29:34,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:29:34,844 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 21:29:34,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:34,845 INFO L225 Difference]: With dead ends: 126 [2020-10-21 21:29:34,845 INFO L226 Difference]: Without dead ends: 121 [2020-10-21 21:29:34,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:29:34,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-21 21:29:34,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2020-10-21 21:29:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 21:29:34,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 233 transitions. [2020-10-21 21:29:34,851 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 233 transitions. Word has length 11 [2020-10-21 21:29:34,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:34,851 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 233 transitions. [2020-10-21 21:29:34,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:29:34,851 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 233 transitions. [2020-10-21 21:29:34,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:34,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:34,852 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:35,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:35,066 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:35,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:35,079 INFO L82 PathProgramCache]: Analyzing trace with hash -390957300, now seen corresponding path program 6 times [2020-10-21 21:29:35,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:35,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338709440] [2020-10-21 21:29:35,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:35,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338709440] [2020-10-21 21:29:35,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762343865] [2020-10-21 21:29:35,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:29:35,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 21:29:35,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:35,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:35,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:35,271 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:29:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:35,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:35,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 21:29:35,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578682899] [2020-10-21 21:29:35,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:29:35,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:35,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:29:35,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:29:35,283 INFO L87 Difference]: Start difference. First operand 95 states and 233 transitions. Second operand 11 states. [2020-10-21 21:29:35,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:35,426 INFO L93 Difference]: Finished difference Result 127 states and 304 transitions. [2020-10-21 21:29:35,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:29:35,427 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 21:29:35,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:35,428 INFO L225 Difference]: With dead ends: 127 [2020-10-21 21:29:35,428 INFO L226 Difference]: Without dead ends: 122 [2020-10-21 21:29:35,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:29:35,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-21 21:29:35,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2020-10-21 21:29:35,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-21 21:29:35,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 241 transitions. [2020-10-21 21:29:35,432 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 241 transitions. Word has length 11 [2020-10-21 21:29:35,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:35,433 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 241 transitions. [2020-10-21 21:29:35,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:29:35,433 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 241 transitions. [2020-10-21 21:29:35,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:35,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:35,434 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:35,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-21 21:29:35,646 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:35,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:35,647 INFO L82 PathProgramCache]: Analyzing trace with hash -390953456, now seen corresponding path program 7 times [2020-10-21 21:29:35,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:35,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474493232] [2020-10-21 21:29:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:35,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474493232] [2020-10-21 21:29:35,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366843714] [2020-10-21 21:29:35,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:29:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:35,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:35,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:35,815 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:35,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:35,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:35,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 21:29:35,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098428686] [2020-10-21 21:29:35,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:29:35,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:35,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:29:35,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:29:35,825 INFO L87 Difference]: Start difference. First operand 97 states and 241 transitions. Second operand 11 states. [2020-10-21 21:29:36,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:36,028 INFO L93 Difference]: Finished difference Result 141 states and 331 transitions. [2020-10-21 21:29:36,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:29:36,029 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 21:29:36,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:36,031 INFO L225 Difference]: With dead ends: 141 [2020-10-21 21:29:36,031 INFO L226 Difference]: Without dead ends: 136 [2020-10-21 21:29:36,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-21 21:29:36,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-21 21:29:36,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2020-10-21 21:29:36,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-21 21:29:36,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 236 transitions. [2020-10-21 21:29:36,036 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 236 transitions. Word has length 11 [2020-10-21 21:29:36,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:36,037 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 236 transitions. [2020-10-21 21:29:36,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:29:36,037 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 236 transitions. [2020-10-21 21:29:36,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:36,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:36,038 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:36,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:29:36,250 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:36,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:36,251 INFO L82 PathProgramCache]: Analyzing trace with hash -390838136, now seen corresponding path program 8 times [2020-10-21 21:29:36,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:36,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731629595] [2020-10-21 21:29:36,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:36,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731629595] [2020-10-21 21:29:36,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555651301] [2020-10-21 21:29:36,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:29:36,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:29:36,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:36,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 21:29:36,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:36,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:29:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:36,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:36,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 21:29:36,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924482986] [2020-10-21 21:29:36,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 21:29:36,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:36,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 21:29:36,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 21:29:36,525 INFO L87 Difference]: Start difference. First operand 96 states and 236 transitions. Second operand 11 states. [2020-10-21 21:29:36,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:36,759 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-21 21:29:36,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 21:29:36,759 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-21 21:29:36,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:36,761 INFO L225 Difference]: With dead ends: 131 [2020-10-21 21:29:36,761 INFO L226 Difference]: Without dead ends: 126 [2020-10-21 21:29:36,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-21 21:29:36,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-21 21:29:36,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2020-10-21 21:29:36,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-21 21:29:36,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-21 21:29:36,766 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-21 21:29:36,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:36,767 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-21 21:29:36,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 21:29:36,767 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-21 21:29:36,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:36,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:36,768 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:36,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-21 21:29:36,982 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:36,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:36,983 INFO L82 PathProgramCache]: Analyzing trace with hash -104542782, now seen corresponding path program 4 times [2020-10-21 21:29:36,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:36,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578018539] [2020-10-21 21:29:36,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:37,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578018539] [2020-10-21 21:29:37,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064570272] [2020-10-21 21:29:37,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:29:37,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:29:37,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:37,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:29:37,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:37,189 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:37,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:37,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-21 21:29:37,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988985290] [2020-10-21 21:29:37,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 21:29:37,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:37,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 21:29:37,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-21 21:29:37,211 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-21 21:29:37,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:37,322 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-21 21:29:37,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:29:37,323 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-21 21:29:37,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:37,325 INFO L225 Difference]: With dead ends: 143 [2020-10-21 21:29:37,325 INFO L226 Difference]: Without dead ends: 138 [2020-10-21 21:29:37,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-21 21:29:37,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-21 21:29:37,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-21 21:29:37,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-21 21:29:37,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-21 21:29:37,330 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-21 21:29:37,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:37,330 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-21 21:29:37,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 21:29:37,331 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-21 21:29:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 21:29:37,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:37,331 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:37,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-21 21:29:37,546 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:37,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:37,546 INFO L82 PathProgramCache]: Analyzing trace with hash 6503895, now seen corresponding path program 4 times [2020-10-21 21:29:37,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:37,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469991877] [2020-10-21 21:29:37,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:37,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469991877] [2020-10-21 21:29:37,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017297103] [2020-10-21 21:29:37,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:29:37,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:29:37,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:37,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:29:37,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:37,741 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:29:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:37,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:37,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:29:37,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672216398] [2020-10-21 21:29:37,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:29:37,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:37,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:29:37,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:29:37,753 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-21 21:29:37,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:37,904 INFO L93 Difference]: Finished difference Result 147 states and 350 transitions. [2020-10-21 21:29:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:29:37,904 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-21 21:29:37,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:37,905 INFO L225 Difference]: With dead ends: 147 [2020-10-21 21:29:37,905 INFO L226 Difference]: Without dead ends: 141 [2020-10-21 21:29:37,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-21 21:29:37,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-21 21:29:37,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2020-10-21 21:29:37,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-21 21:29:37,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-21 21:29:37,911 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-21 21:29:37,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:37,911 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-21 21:29:37,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:29:37,911 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-21 21:29:37,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:29:37,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:37,912 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:38,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-21 21:29:38,113 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:38,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:38,113 INFO L82 PathProgramCache]: Analyzing trace with hash 650737181, now seen corresponding path program 9 times [2020-10-21 21:29:38,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:38,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699609810] [2020-10-21 21:29:38,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:38,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699609810] [2020-10-21 21:29:38,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307333788] [2020-10-21 21:29:38,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:29:38,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 21:29:38,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:38,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:29:38,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:38,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:29:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:38,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:38,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:29:38,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691720253] [2020-10-21 21:29:38,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:29:38,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:38,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:29:38,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:29:38,344 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-21 21:29:38,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:29:38,590 INFO L93 Difference]: Finished difference Result 152 states and 363 transitions. [2020-10-21 21:29:38,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:29:38,591 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:29:38,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:29:38,592 INFO L225 Difference]: With dead ends: 152 [2020-10-21 21:29:38,592 INFO L226 Difference]: Without dead ends: 147 [2020-10-21 21:29:38,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:29:38,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-21 21:29:38,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2020-10-21 21:29:38,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 21:29:38,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 277 transitions. [2020-10-21 21:29:38,597 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 277 transitions. Word has length 12 [2020-10-21 21:29:38,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:29:38,598 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 277 transitions. [2020-10-21 21:29:38,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:29:38,598 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 277 transitions. [2020-10-21 21:29:38,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:29:38,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:29:38,599 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:29:38,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-21 21:29:38,799 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:29:38,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:29:38,800 INFO L82 PathProgramCache]: Analyzing trace with hash 650852501, now seen corresponding path program 10 times [2020-10-21 21:29:38,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:29:38,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008633372] [2020-10-21 21:29:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:29:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:29:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:38,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008633372] [2020-10-21 21:29:38,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320436596] [2020-10-21 21:29:38,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:29:38,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:29:38,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:29:38,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:29:38,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:29:39,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:29:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:29:40,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:29:40,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-21 21:29:40,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944897923] [2020-10-21 21:29:40,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 21:29:40,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:29:40,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 21:29:40,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=125, Unknown=1, NotChecked=0, Total=182 [2020-10-21 21:29:40,108 INFO L87 Difference]: Start difference. First operand 112 states and 277 transitions. Second operand 14 states. [2020-10-21 21:29:44,821 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-10-21 21:29:56,433 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-10-21 21:30:06,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:06,976 INFO L93 Difference]: Finished difference Result 171 states and 404 transitions. [2020-10-21 21:30:06,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 21:30:06,979 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-10-21 21:30:06,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:06,980 INFO L225 Difference]: With dead ends: 171 [2020-10-21 21:30:06,981 INFO L226 Difference]: Without dead ends: 166 [2020-10-21 21:30:06,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=206, Invalid=440, Unknown=4, NotChecked=0, Total=650 [2020-10-21 21:30:06,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-21 21:30:06,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 112. [2020-10-21 21:30:06,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 21:30:06,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 279 transitions. [2020-10-21 21:30:06,986 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 279 transitions. Word has length 12 [2020-10-21 21:30:06,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:06,986 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 279 transitions. [2020-10-21 21:30:06,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 21:30:06,986 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 279 transitions. [2020-10-21 21:30:06,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:06,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:06,987 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:07,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:07,188 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:07,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:07,189 INFO L82 PathProgramCache]: Analyzing trace with hash 650856345, now seen corresponding path program 11 times [2020-10-21 21:30:07,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:07,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028243687] [2020-10-21 21:30:07,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:07,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028243687] [2020-10-21 21:30:07,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130786565] [2020-10-21 21:30:07,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:30:07,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:30:07,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:07,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:07,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:07,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:07,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:07,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:07,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780672775] [2020-10-21 21:30:07,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:07,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:07,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:07,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:07,397 INFO L87 Difference]: Start difference. First operand 112 states and 279 transitions. Second operand 13 states. [2020-10-21 21:30:07,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:07,658 INFO L93 Difference]: Finished difference Result 148 states and 355 transitions. [2020-10-21 21:30:07,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:30:07,659 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:07,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:07,660 INFO L225 Difference]: With dead ends: 148 [2020-10-21 21:30:07,661 INFO L226 Difference]: Without dead ends: 143 [2020-10-21 21:30:07,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:30:07,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-21 21:30:07,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2020-10-21 21:30:07,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-21 21:30:07,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 274 transitions. [2020-10-21 21:30:07,667 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 274 transitions. Word has length 12 [2020-10-21 21:30:07,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:07,667 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 274 transitions. [2020-10-21 21:30:07,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:07,668 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 274 transitions. [2020-10-21 21:30:07,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:07,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:07,669 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:07,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:07,870 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:07,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:07,870 INFO L82 PathProgramCache]: Analyzing trace with hash 654427421, now seen corresponding path program 12 times [2020-10-21 21:30:07,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:07,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583560537] [2020-10-21 21:30:07,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:07,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583560537] [2020-10-21 21:30:07,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542300328] [2020-10-21 21:30:07,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:30:08,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 21:30:08,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:08,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:08,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:08,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:08,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:08,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:08,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961455219] [2020-10-21 21:30:08,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:08,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:08,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:08,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:08,132 INFO L87 Difference]: Start difference. First operand 111 states and 274 transitions. Second operand 13 states. [2020-10-21 21:30:08,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:08,485 INFO L93 Difference]: Finished difference Result 167 states and 399 transitions. [2020-10-21 21:30:08,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 21:30:08,485 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:08,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:08,487 INFO L225 Difference]: With dead ends: 167 [2020-10-21 21:30:08,487 INFO L226 Difference]: Without dead ends: 162 [2020-10-21 21:30:08,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-21 21:30:08,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-21 21:30:08,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2020-10-21 21:30:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 21:30:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 287 transitions. [2020-10-21 21:30:08,493 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 287 transitions. Word has length 12 [2020-10-21 21:30:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:08,493 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 287 transitions. [2020-10-21 21:30:08,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 287 transitions. [2020-10-21 21:30:08,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:08,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:08,494 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:08,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:08,707 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:08,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:08,707 INFO L82 PathProgramCache]: Analyzing trace with hash 654431265, now seen corresponding path program 13 times [2020-10-21 21:30:08,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:08,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647583251] [2020-10-21 21:30:08,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:08,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647583251] [2020-10-21 21:30:08,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740469172] [2020-10-21 21:30:08,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:30:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:08,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:08,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:08,900 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:08,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:08,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:08,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30680192] [2020-10-21 21:30:08,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:08,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:08,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:08,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:08,910 INFO L87 Difference]: Start difference. First operand 114 states and 287 transitions. Second operand 13 states. [2020-10-21 21:30:09,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:09,239 INFO L93 Difference]: Finished difference Result 177 states and 423 transitions. [2020-10-21 21:30:09,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 21:30:09,243 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:09,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:09,244 INFO L225 Difference]: With dead ends: 177 [2020-10-21 21:30:09,244 INFO L226 Difference]: Without dead ends: 169 [2020-10-21 21:30:09,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-21 21:30:09,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-21 21:30:09,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 114. [2020-10-21 21:30:09,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 21:30:09,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 283 transitions. [2020-10-21 21:30:09,248 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 283 transitions. Word has length 12 [2020-10-21 21:30:09,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:09,248 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 283 transitions. [2020-10-21 21:30:09,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:09,249 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 283 transitions. [2020-10-21 21:30:09,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:09,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:09,249 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:09,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-21 21:30:09,460 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:09,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:09,460 INFO L82 PathProgramCache]: Analyzing trace with hash 654546585, now seen corresponding path program 14 times [2020-10-21 21:30:09,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:09,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307896651] [2020-10-21 21:30:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:09,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307896651] [2020-10-21 21:30:09,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523962065] [2020-10-21 21:30:09,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:30:09,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:30:09,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:09,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:09,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:09,746 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:09,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:09,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:09,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:09,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738561989] [2020-10-21 21:30:09,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:09,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:09,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:09,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:09,779 INFO L87 Difference]: Start difference. First operand 114 states and 283 transitions. Second operand 13 states. [2020-10-21 21:30:10,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:10,081 INFO L93 Difference]: Finished difference Result 165 states and 395 transitions. [2020-10-21 21:30:10,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 21:30:10,082 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:10,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:10,083 INFO L225 Difference]: With dead ends: 165 [2020-10-21 21:30:10,084 INFO L226 Difference]: Without dead ends: 160 [2020-10-21 21:30:10,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:30:10,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-21 21:30:10,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2020-10-21 21:30:10,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 21:30:10,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-21 21:30:10,089 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 12 [2020-10-21 21:30:10,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:10,089 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-21 21:30:10,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:10,089 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-21 21:30:10,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:10,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:10,090 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:10,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-21 21:30:10,303 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:10,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:10,303 INFO L82 PathProgramCache]: Analyzing trace with hash 765249941, now seen corresponding path program 15 times [2020-10-21 21:30:10,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:10,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139710668] [2020-10-21 21:30:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:10,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139710668] [2020-10-21 21:30:10,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064534185] [2020-10-21 21:30:10,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:30:10,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 21:30:10,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:10,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:10,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:10,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:10,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:10,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:10,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511602902] [2020-10-21 21:30:10,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:10,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:10,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:10,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:10,507 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-21 21:30:10,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:10,728 INFO L93 Difference]: Finished difference Result 158 states and 378 transitions. [2020-10-21 21:30:10,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 21:30:10,729 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:10,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:10,731 INFO L225 Difference]: With dead ends: 158 [2020-10-21 21:30:10,731 INFO L226 Difference]: Without dead ends: 153 [2020-10-21 21:30:10,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:30:10,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-21 21:30:10,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2020-10-21 21:30:10,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-21 21:30:10,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 291 transitions. [2020-10-21 21:30:10,736 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 291 transitions. Word has length 12 [2020-10-21 21:30:10,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:10,736 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 291 transitions. [2020-10-21 21:30:10,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:10,736 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 291 transitions. [2020-10-21 21:30:10,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:10,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:10,737 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:10,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-21 21:30:10,949 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:10,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:10,949 INFO L82 PathProgramCache]: Analyzing trace with hash 765253785, now seen corresponding path program 16 times [2020-10-21 21:30:10,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:10,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243074823] [2020-10-21 21:30:10,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:11,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:11,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243074823] [2020-10-21 21:30:11,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277494605] [2020-10-21 21:30:11,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:30:11,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:30:11,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:11,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:11,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:11,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:11,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:11,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:11,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105229436] [2020-10-21 21:30:11,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:11,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:11,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:11,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:11,212 INFO L87 Difference]: Start difference. First operand 116 states and 291 transitions. Second operand 13 states. [2020-10-21 21:30:11,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:11,674 INFO L93 Difference]: Finished difference Result 185 states and 436 transitions. [2020-10-21 21:30:11,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 21:30:11,675 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:11,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:11,677 INFO L225 Difference]: With dead ends: 185 [2020-10-21 21:30:11,677 INFO L226 Difference]: Without dead ends: 177 [2020-10-21 21:30:11,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:30:11,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-21 21:30:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 115. [2020-10-21 21:30:11,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-21 21:30:11,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 286 transitions. [2020-10-21 21:30:11,684 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 286 transitions. Word has length 12 [2020-10-21 21:30:11,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:11,685 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 286 transitions. [2020-10-21 21:30:11,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:11,685 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 286 transitions. [2020-10-21 21:30:11,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:11,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:11,686 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:11,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-21 21:30:11,900 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:11,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:11,901 INFO L82 PathProgramCache]: Analyzing trace with hash 765369105, now seen corresponding path program 17 times [2020-10-21 21:30:11,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:11,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037035705] [2020-10-21 21:30:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:12,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037035705] [2020-10-21 21:30:12,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659264510] [2020-10-21 21:30:12,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:30:12,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:30:12,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:12,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:12,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:12,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:12,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:12,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:12,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625458650] [2020-10-21 21:30:12,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:12,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:12,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:12,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:12,184 INFO L87 Difference]: Start difference. First operand 115 states and 286 transitions. Second operand 13 states. [2020-10-21 21:30:12,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:12,554 INFO L93 Difference]: Finished difference Result 194 states and 459 transitions. [2020-10-21 21:30:12,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 21:30:12,554 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:12,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:12,556 INFO L225 Difference]: With dead ends: 194 [2020-10-21 21:30:12,557 INFO L226 Difference]: Without dead ends: 186 [2020-10-21 21:30:12,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-21 21:30:12,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-21 21:30:12,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 117. [2020-10-21 21:30:12,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-21 21:30:12,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 283 transitions. [2020-10-21 21:30:12,561 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 283 transitions. Word has length 12 [2020-10-21 21:30:12,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:12,562 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 283 transitions. [2020-10-21 21:30:12,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:12,562 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 283 transitions. [2020-10-21 21:30:12,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:12,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:12,563 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:12,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-21 21:30:12,774 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:12,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:12,774 INFO L82 PathProgramCache]: Analyzing trace with hash 765372949, now seen corresponding path program 18 times [2020-10-21 21:30:12,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:12,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271468187] [2020-10-21 21:30:12,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:12,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271468187] [2020-10-21 21:30:12,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960738097] [2020-10-21 21:30:12,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:30:12,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 21:30:12,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:12,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 21:30:12,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:12,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:12,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:12,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 21:30:12,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022109668] [2020-10-21 21:30:12,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 21:30:12,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:12,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 21:30:12,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 21:30:12,984 INFO L87 Difference]: Start difference. First operand 117 states and 283 transitions. Second operand 13 states. [2020-10-21 21:30:13,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:13,293 INFO L93 Difference]: Finished difference Result 172 states and 404 transitions. [2020-10-21 21:30:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 21:30:13,294 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-21 21:30:13,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:13,296 INFO L225 Difference]: With dead ends: 172 [2020-10-21 21:30:13,296 INFO L226 Difference]: Without dead ends: 167 [2020-10-21 21:30:13,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-21 21:30:13,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-21 21:30:13,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 114. [2020-10-21 21:30:13,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 21:30:13,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-21 21:30:13,304 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-21 21:30:13,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:13,304 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-21 21:30:13,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 21:30:13,304 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-21 21:30:13,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:13,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:13,305 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:13,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:13,517 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:13,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:13,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1054169251, now seen corresponding path program 5 times [2020-10-21 21:30:13,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:13,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956029385] [2020-10-21 21:30:13,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:13,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956029385] [2020-10-21 21:30:13,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099093108] [2020-10-21 21:30:13,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:30:13,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 21:30:13,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:13,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:13,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:13,783 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:13,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:13,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 21:30:13,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652322212] [2020-10-21 21:30:13,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 21:30:13,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:13,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 21:30:13,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-21 21:30:13,818 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-21 21:30:14,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:14,049 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-21 21:30:14,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:30:14,049 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-21 21:30:14,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:14,051 INFO L225 Difference]: With dead ends: 164 [2020-10-21 21:30:14,051 INFO L226 Difference]: Without dead ends: 159 [2020-10-21 21:30:14,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-21 21:30:14,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-21 21:30:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-21 21:30:14,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-21 21:30:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-21 21:30:14,056 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-21 21:30:14,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:14,056 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-21 21:30:14,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 21:30:14,056 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-21 21:30:14,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 21:30:14,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:14,057 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:14,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-21 21:30:14,268 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:14,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:14,269 INFO L82 PathProgramCache]: Analyzing trace with hash 201645098, now seen corresponding path program 5 times [2020-10-21 21:30:14,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:14,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401520847] [2020-10-21 21:30:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:14,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401520847] [2020-10-21 21:30:14,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120375046] [2020-10-21 21:30:14,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:30:14,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 21:30:14,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:14,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:14,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:14,525 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:14,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:14,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:30:14,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489629950] [2020-10-21 21:30:14,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:30:14,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:14,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:30:14,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:30:14,537 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-21 21:30:14,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:14,715 INFO L93 Difference]: Finished difference Result 173 states and 412 transitions. [2020-10-21 21:30:14,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:30:14,716 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-21 21:30:14,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:14,717 INFO L225 Difference]: With dead ends: 173 [2020-10-21 21:30:14,717 INFO L226 Difference]: Without dead ends: 167 [2020-10-21 21:30:14,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-21 21:30:14,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-21 21:30:14,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 132. [2020-10-21 21:30:14,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 21:30:14,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 21:30:14,724 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-21 21:30:14,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:14,724 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 21:30:14,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:30:14,724 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 21:30:14,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:30:14,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:14,725 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:14,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-21 21:30:14,936 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:14,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:14,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1302074836, now seen corresponding path program 19 times [2020-10-21 21:30:14,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:14,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787450780] [2020-10-21 21:30:14,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:15,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787450780] [2020-10-21 21:30:15,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819770064] [2020-10-21 21:30:15,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:30:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:15,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:15,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:15,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:15,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:15,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:30:15,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3319762] [2020-10-21 21:30:15,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:30:15,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:15,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:30:15,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:30:15,189 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-21 21:30:15,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:15,514 INFO L93 Difference]: Finished difference Result 183 states and 437 transitions. [2020-10-21 21:30:15,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:30:15,514 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:30:15,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:15,516 INFO L225 Difference]: With dead ends: 183 [2020-10-21 21:30:15,516 INFO L226 Difference]: Without dead ends: 178 [2020-10-21 21:30:15,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:30:15,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-21 21:30:15,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 131. [2020-10-21 21:30:15,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 21:30:15,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 327 transitions. [2020-10-21 21:30:15,522 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 327 transitions. Word has length 13 [2020-10-21 21:30:15,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:15,522 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 327 transitions. [2020-10-21 21:30:15,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:30:15,523 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 327 transitions. [2020-10-21 21:30:15,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:30:15,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:15,523 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:15,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:15,735 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:15,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:15,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1301959516, now seen corresponding path program 20 times [2020-10-21 21:30:15,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:15,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685652313] [2020-10-21 21:30:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:15,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685652313] [2020-10-21 21:30:15,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644293528] [2020-10-21 21:30:15,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:30:15,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:30:15,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:15,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:15,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:16,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:18,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:18,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 21:30:18,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260501981] [2020-10-21 21:30:18,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 21:30:18,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:18,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 21:30:18,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=166, Unknown=1, NotChecked=0, Total=240 [2020-10-21 21:30:18,098 INFO L87 Difference]: Start difference. First operand 131 states and 327 transitions. Second operand 16 states. [2020-10-21 21:30:31,518 WARN L193 SmtUtils]: Spent 13.30 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-21 21:30:37,983 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-10-21 21:30:50,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:50,517 INFO L93 Difference]: Finished difference Result 204 states and 484 transitions. [2020-10-21 21:30:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-21 21:30:50,552 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-21 21:30:50,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:50,553 INFO L225 Difference]: With dead ends: 204 [2020-10-21 21:30:50,553 INFO L226 Difference]: Without dead ends: 199 [2020-10-21 21:30:50,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=260, Invalid=550, Unknown=2, NotChecked=0, Total=812 [2020-10-21 21:30:50,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-21 21:30:50,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 131. [2020-10-21 21:30:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 21:30:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 329 transitions. [2020-10-21 21:30:50,558 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 329 transitions. Word has length 13 [2020-10-21 21:30:50,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:50,559 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 329 transitions. [2020-10-21 21:30:50,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 21:30:50,559 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 329 transitions. [2020-10-21 21:30:50,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:30:50,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:50,560 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:50,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:50,771 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:50,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:50,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1301955672, now seen corresponding path program 21 times [2020-10-21 21:30:50,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:50,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495926579] [2020-10-21 21:30:50,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:50,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495926579] [2020-10-21 21:30:50,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103200868] [2020-10-21 21:30:50,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:30:50,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 21:30:50,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:50,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:50,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:51,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:30:51,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:51,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:51,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:30:51,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124422936] [2020-10-21 21:30:51,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:30:51,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:51,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:30:51,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:30:51,044 INFO L87 Difference]: Start difference. First operand 131 states and 329 transitions. Second operand 15 states. [2020-10-21 21:30:51,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:51,362 INFO L93 Difference]: Finished difference Result 184 states and 441 transitions. [2020-10-21 21:30:51,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:30:51,363 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:30:51,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:51,364 INFO L225 Difference]: With dead ends: 184 [2020-10-21 21:30:51,364 INFO L226 Difference]: Without dead ends: 179 [2020-10-21 21:30:51,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:30:51,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-21 21:30:51,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 129. [2020-10-21 21:30:51,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-21 21:30:51,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 319 transitions. [2020-10-21 21:30:51,370 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 319 transitions. Word has length 13 [2020-10-21 21:30:51,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:51,370 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 319 transitions. [2020-10-21 21:30:51,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:30:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 319 transitions. [2020-10-21 21:30:51,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:30:51,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:51,371 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:51,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-21 21:30:51,583 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:51,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:51,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1298384596, now seen corresponding path program 22 times [2020-10-21 21:30:51,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:51,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771874162] [2020-10-21 21:30:51,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:51,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771874162] [2020-10-21 21:30:51,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843753785] [2020-10-21 21:30:51,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:30:51,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:30:51,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:51,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:51,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:51,897 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:51,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:51,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:30:51,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511175775] [2020-10-21 21:30:51,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:30:51,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:51,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:30:51,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:30:51,942 INFO L87 Difference]: Start difference. First operand 129 states and 319 transitions. Second operand 15 states. [2020-10-21 21:30:52,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:30:52,522 INFO L93 Difference]: Finished difference Result 207 states and 492 transitions. [2020-10-21 21:30:52,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 21:30:52,522 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:30:52,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:30:52,524 INFO L225 Difference]: With dead ends: 207 [2020-10-21 21:30:52,524 INFO L226 Difference]: Without dead ends: 202 [2020-10-21 21:30:52,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-21 21:30:52,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-21 21:30:52,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 132. [2020-10-21 21:30:52,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 21:30:52,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 21:30:52,529 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-10-21 21:30:52,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:30:52,530 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 21:30:52,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:30:52,530 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 21:30:52,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:30:52,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:30:52,531 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:30:52,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:30:52,733 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:30:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:30:52,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1298380752, now seen corresponding path program 23 times [2020-10-21 21:30:52,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:30:52,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083930836] [2020-10-21 21:30:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:30:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:30:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:52,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083930836] [2020-10-21 21:30:52,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338575031] [2020-10-21 21:30:52,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:30:52,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:30:52,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:30:52,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:30:52,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:30:55,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:30:55,104 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-21 21:30:59,242 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 20 [2020-10-21 21:30:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:30:59,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:30:59,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 21:30:59,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399664893] [2020-10-21 21:30:59,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 21:30:59,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:30:59,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 21:30:59,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=168, Unknown=2, NotChecked=0, Total=240 [2020-10-21 21:30:59,244 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 16 states. [2020-10-21 21:31:03,373 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-10-21 21:31:07,589 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-21 21:31:20,344 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-10-21 21:31:46,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:31:46,322 INFO L93 Difference]: Finished difference Result 228 states and 551 transitions. [2020-10-21 21:31:46,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-21 21:31:46,357 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-21 21:31:46,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:31:46,358 INFO L225 Difference]: With dead ends: 228 [2020-10-21 21:31:46,359 INFO L226 Difference]: Without dead ends: 224 [2020-10-21 21:31:46,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=335, Invalid=780, Unknown=7, NotChecked=0, Total=1122 [2020-10-21 21:31:46,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-21 21:31:46,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 146. [2020-10-21 21:31:46,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-21 21:31:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 372 transitions. [2020-10-21 21:31:46,363 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 372 transitions. Word has length 13 [2020-10-21 21:31:46,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:31:46,364 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 372 transitions. [2020-10-21 21:31:46,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 21:31:46,364 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 372 transitions. [2020-10-21 21:31:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:31:46,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:31:46,365 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:31:46,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-21 21:31:46,575 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:31:46,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:31:46,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1298265432, now seen corresponding path program 24 times [2020-10-21 21:31:46,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:31:46,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595987747] [2020-10-21 21:31:46,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:31:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:31:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:46,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595987747] [2020-10-21 21:31:46,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650227054] [2020-10-21 21:31:46,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:31:46,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 21:31:46,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:31:46,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:31:46,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:31:46,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:31:46,853 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:31:46,890 INFO L721 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-10-21 21:31:53,050 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 73 DAG size of output: 33 [2020-10-21 21:31:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:31:53,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:31:53,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 21:31:53,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776271422] [2020-10-21 21:31:53,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 21:31:53,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:31:53,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 21:31:53,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=169, Unknown=1, NotChecked=0, Total=240 [2020-10-21 21:31:53,054 INFO L87 Difference]: Start difference. First operand 146 states and 372 transitions. Second operand 16 states. [2020-10-21 21:32:01,539 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 40 [2020-10-21 21:32:03,739 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 50 [2020-10-21 21:32:14,027 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-21 21:32:48,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:32:48,411 INFO L93 Difference]: Finished difference Result 239 states and 576 transitions. [2020-10-21 21:32:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-21 21:32:48,412 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-21 21:32:48,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:32:48,413 INFO L225 Difference]: With dead ends: 239 [2020-10-21 21:32:48,414 INFO L226 Difference]: Without dead ends: 236 [2020-10-21 21:32:48,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=298, Invalid=687, Unknown=7, NotChecked=0, Total=992 [2020-10-21 21:32:48,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-21 21:32:48,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 151. [2020-10-21 21:32:48,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-21 21:32:48,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 387 transitions. [2020-10-21 21:32:48,420 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 387 transitions. Word has length 13 [2020-10-21 21:32:48,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:32:48,420 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 387 transitions. [2020-10-21 21:32:48,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 21:32:48,421 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 387 transitions. [2020-10-21 21:32:48,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:32:48,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:32:48,422 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:32:48,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:32:48,629 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:32:48,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:32:48,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1187562076, now seen corresponding path program 25 times [2020-10-21 21:32:48,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:32:48,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555809821] [2020-10-21 21:32:48,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:32:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:32:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:32:48,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555809821] [2020-10-21 21:32:48,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778803228] [2020-10-21 21:32:48,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:32:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:32:48,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:32:48,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:32:48,900 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:32:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:32:48,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:32:48,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:32:48,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401170918] [2020-10-21 21:32:48,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:32:48,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:32:48,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:32:48,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:32:48,914 INFO L87 Difference]: Start difference. First operand 151 states and 387 transitions. Second operand 15 states. [2020-10-21 21:32:49,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:32:49,485 INFO L93 Difference]: Finished difference Result 224 states and 552 transitions. [2020-10-21 21:32:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 21:32:49,486 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:32:49,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:32:49,488 INFO L225 Difference]: With dead ends: 224 [2020-10-21 21:32:49,488 INFO L226 Difference]: Without dead ends: 219 [2020-10-21 21:32:49,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-21 21:32:49,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-21 21:32:49,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 156. [2020-10-21 21:32:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-21 21:32:49,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 408 transitions. [2020-10-21 21:32:49,494 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 408 transitions. Word has length 13 [2020-10-21 21:32:49,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:32:49,494 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 408 transitions. [2020-10-21 21:32:49,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:32:49,494 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 408 transitions. [2020-10-21 21:32:49,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:32:49,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:32:49,495 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:32:49,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-21 21:32:49,704 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:32:49,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:32:49,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1187558232, now seen corresponding path program 26 times [2020-10-21 21:32:49,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:32:49,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228391257] [2020-10-21 21:32:49,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:32:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:32:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:32:49,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228391257] [2020-10-21 21:32:49,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350184316] [2020-10-21 21:32:49,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:32:49,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:32:49,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:32:49,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:32:49,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:32:49,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:32:49,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:32:49,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:32:49,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:32:49,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789452154] [2020-10-21 21:32:49,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:32:49,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:32:49,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:32:49,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:32:49,978 INFO L87 Difference]: Start difference. First operand 156 states and 408 transitions. Second operand 15 states. [2020-10-21 21:32:50,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:32:50,830 INFO L93 Difference]: Finished difference Result 221 states and 549 transitions. [2020-10-21 21:32:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 21:32:50,831 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:32:50,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:32:50,833 INFO L225 Difference]: With dead ends: 221 [2020-10-21 21:32:50,833 INFO L226 Difference]: Without dead ends: 216 [2020-10-21 21:32:50,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 21:32:50,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-21 21:32:50,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 155. [2020-10-21 21:32:50,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-21 21:32:50,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 403 transitions. [2020-10-21 21:32:50,839 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 403 transitions. Word has length 13 [2020-10-21 21:32:50,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:32:50,840 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 403 transitions. [2020-10-21 21:32:50,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:32:50,840 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 403 transitions. [2020-10-21 21:32:50,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:32:50,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:32:50,841 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:32:51,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-21 21:32:51,055 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:32:51,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:32:51,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1187442912, now seen corresponding path program 27 times [2020-10-21 21:32:51,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:32:51,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362927244] [2020-10-21 21:32:51,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:32:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:32:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:32:51,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362927244] [2020-10-21 21:32:51,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043185375] [2020-10-21 21:32:51,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:32:51,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 21:32:51,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:32:51,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:32:51,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:32:51,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:32:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:32:51,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:32:51,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:32:51,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305309522] [2020-10-21 21:32:51,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:32:51,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:32:51,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:32:51,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:32:51,324 INFO L87 Difference]: Start difference. First operand 155 states and 403 transitions. Second operand 15 states. [2020-10-21 21:32:52,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:32:52,010 INFO L93 Difference]: Finished difference Result 242 states and 600 transitions. [2020-10-21 21:32:52,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 21:32:52,010 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:32:52,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:32:52,012 INFO L225 Difference]: With dead ends: 242 [2020-10-21 21:32:52,012 INFO L226 Difference]: Without dead ends: 232 [2020-10-21 21:32:52,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 21:32:52,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-21 21:32:52,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-21 21:32:52,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-21 21:32:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 386 transitions. [2020-10-21 21:32:52,018 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 386 transitions. Word has length 13 [2020-10-21 21:32:52,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:32:52,018 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 386 transitions. [2020-10-21 21:32:52,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:32:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 386 transitions. [2020-10-21 21:32:52,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:32:52,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:32:52,019 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:32:52,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-21 21:32:52,232 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:32:52,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:32:52,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1187439068, now seen corresponding path program 28 times [2020-10-21 21:32:52,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:32:52,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375341199] [2020-10-21 21:32:52,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:32:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:32:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:32:52,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375341199] [2020-10-21 21:32:52,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070040347] [2020-10-21 21:32:52,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:32:52,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 21:32:52,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:32:52,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:32:52,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:32:52,474 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:32:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:32:52,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:32:52,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:32:52,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459695445] [2020-10-21 21:32:52,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:32:52,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:32:52,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:32:52,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:32:52,487 INFO L87 Difference]: Start difference. First operand 148 states and 386 transitions. Second operand 15 states. [2020-10-21 21:32:53,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:32:53,077 INFO L93 Difference]: Finished difference Result 225 states and 552 transitions. [2020-10-21 21:32:53,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 21:32:53,078 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:32:53,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:32:53,080 INFO L225 Difference]: With dead ends: 225 [2020-10-21 21:32:53,080 INFO L226 Difference]: Without dead ends: 215 [2020-10-21 21:32:53,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 21:32:53,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-21 21:32:53,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 141. [2020-10-21 21:32:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-21 21:32:53,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 361 transitions. [2020-10-21 21:32:53,084 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 361 transitions. Word has length 13 [2020-10-21 21:32:53,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:32:53,085 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 361 transitions. [2020-10-21 21:32:53,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:32:53,085 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 361 transitions. [2020-10-21 21:32:53,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:32:53,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:32:53,086 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:32:53,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-21 21:32:53,296 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:32:53,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:32:53,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1183864148, now seen corresponding path program 29 times [2020-10-21 21:32:53,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:32:53,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495861067] [2020-10-21 21:32:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:32:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:32:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:32:53,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495861067] [2020-10-21 21:32:53,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466942894] [2020-10-21 21:32:53,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:32:53,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 21:32:53,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:32:53,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:32:53,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:32:53,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:32:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:32:53,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:32:53,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:32:53,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645203040] [2020-10-21 21:32:53,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:32:53,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:32:53,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:32:53,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:32:53,684 INFO L87 Difference]: Start difference. First operand 141 states and 361 transitions. Second operand 15 states. [2020-10-21 21:32:54,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:32:54,797 INFO L93 Difference]: Finished difference Result 216 states and 520 transitions. [2020-10-21 21:32:54,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 21:32:54,797 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:32:54,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:32:54,799 INFO L225 Difference]: With dead ends: 216 [2020-10-21 21:32:54,799 INFO L226 Difference]: Without dead ends: 209 [2020-10-21 21:32:54,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 21:32:54,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-21 21:32:54,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 129. [2020-10-21 21:32:54,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-21 21:32:54,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 317 transitions. [2020-10-21 21:32:54,804 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 317 transitions. Word has length 13 [2020-10-21 21:32:54,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:32:54,804 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 317 transitions. [2020-10-21 21:32:54,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:32:54,804 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 317 transitions. [2020-10-21 21:32:54,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:32:54,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:32:54,805 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:32:55,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-21 21:32:55,015 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:32:55,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:32:55,015 INFO L82 PathProgramCache]: Analyzing trace with hash -2047031252, now seen corresponding path program 30 times [2020-10-21 21:32:55,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:32:55,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088150221] [2020-10-21 21:32:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:32:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:32:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:32:55,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088150221] [2020-10-21 21:32:55,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990160524] [2020-10-21 21:32:55,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:32:55,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 21:32:55,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:32:55,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:32:55,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:32:55,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:32:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:32:55,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:32:55,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:32:55,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93508354] [2020-10-21 21:32:55,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:32:55,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:32:55,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:32:55,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:32:55,292 INFO L87 Difference]: Start difference. First operand 129 states and 317 transitions. Second operand 15 states. [2020-10-21 21:32:55,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:32:55,642 INFO L93 Difference]: Finished difference Result 189 states and 452 transitions. [2020-10-21 21:32:55,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 21:32:55,643 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:32:55,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:32:55,644 INFO L225 Difference]: With dead ends: 189 [2020-10-21 21:32:55,644 INFO L226 Difference]: Without dead ends: 184 [2020-10-21 21:32:55,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-21 21:32:55,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-21 21:32:55,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 135. [2020-10-21 21:32:55,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-21 21:32:55,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 341 transitions. [2020-10-21 21:32:55,649 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 341 transitions. Word has length 13 [2020-10-21 21:32:55,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:32:55,649 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 341 transitions. [2020-10-21 21:32:55,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:32:55,649 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 341 transitions. [2020-10-21 21:32:55,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:32:55,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:32:55,650 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:32:55,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-21 21:32:55,860 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:32:55,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:32:55,860 INFO L82 PathProgramCache]: Analyzing trace with hash -2047027408, now seen corresponding path program 31 times [2020-10-21 21:32:55,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:32:55,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656400759] [2020-10-21 21:32:55,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:32:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:32:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:32:55,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656400759] [2020-10-21 21:32:55,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082544725] [2020-10-21 21:32:55,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:32:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:32:55,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:32:55,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:32:56,098 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 21:32:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:32:56,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:32:56,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 21:32:56,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027087070] [2020-10-21 21:32:56,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 21:32:56,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:32:56,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 21:32:56,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-21 21:32:56,117 INFO L87 Difference]: Start difference. First operand 135 states and 341 transitions. Second operand 15 states. [2020-10-21 21:32:56,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 21:32:56,725 INFO L93 Difference]: Finished difference Result 218 states and 521 transitions. [2020-10-21 21:32:56,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 21:32:56,726 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-21 21:32:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 21:32:56,727 INFO L225 Difference]: With dead ends: 218 [2020-10-21 21:32:56,727 INFO L226 Difference]: Without dead ends: 213 [2020-10-21 21:32:56,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-21 21:32:56,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-21 21:32:56,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 134. [2020-10-21 21:32:56,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-21 21:32:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 336 transitions. [2020-10-21 21:32:56,732 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 336 transitions. Word has length 13 [2020-10-21 21:32:56,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 21:32:56,732 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 336 transitions. [2020-10-21 21:32:56,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 21:32:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 336 transitions. [2020-10-21 21:32:56,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 21:32:56,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 21:32:56,733 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 21:32:56,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-21 21:32:56,945 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 21:32:56,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 21:32:56,945 INFO L82 PathProgramCache]: Analyzing trace with hash -2046912088, now seen corresponding path program 32 times [2020-10-21 21:32:56,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 21:32:56,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444675635] [2020-10-21 21:32:56,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 21:32:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 21:32:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:32:57,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444675635] [2020-10-21 21:32:57,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987953130] [2020-10-21 21:32:57,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 21:32:57,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 21:32:57,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 21:32:57,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 21:32:57,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 21:32:57,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 21:33:01,373 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-21 21:33:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 21:33:01,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 21:33:01,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 21:33:01,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610980294] [2020-10-21 21:33:01,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 21:33:01,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 21:33:01,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 21:33:01,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-21 21:33:01,376 INFO L87 Difference]: Start difference. First operand 134 states and 336 transitions. Second operand 16 states. [2020-10-21 21:33:01,847 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 22 [2020-10-21 21:33:03,966 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 26 [2020-10-21 21:33:34,717 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-21 21:33:43,029 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 40 DAG size of output: 25 Received shutdown request... [2020-10-21 21:34:07,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-21 21:34:07,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 21:34:07,682 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-21 21:34:07,688 WARN L235 ceAbstractionStarter]: Timeout [2020-10-21 21:34:07,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 09:34:07 BasicIcfg [2020-10-21 21:34:07,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-21 21:34:07,690 INFO L168 Benchmark]: Toolchain (without parser) took 281239.76 ms. Allocated memory was 140.0 MB in the beginning and 366.5 MB in the end (delta: 226.5 MB). Free memory was 101.1 MB in the beginning and 159.9 MB in the end (delta: -58.9 MB). Peak memory consumption was 167.6 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:07,690 INFO L168 Benchmark]: CDTParser took 2.84 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-10-21 21:34:07,690 INFO L168 Benchmark]: CACSL2BoogieTranslator took 728.87 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 100.0 MB in the beginning and 160.2 MB in the end (delta: -60.2 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:07,691 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.46 ms. Allocated memory is still 203.4 MB. Free memory was 160.2 MB in the beginning and 158.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:07,691 INFO L168 Benchmark]: Boogie Preprocessor took 29.19 ms. Allocated memory is still 203.4 MB. Free memory was 158.2 MB in the beginning and 156.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:07,691 INFO L168 Benchmark]: RCFGBuilder took 449.02 ms. Allocated memory is still 203.4 MB. Free memory was 156.2 MB in the beginning and 134.0 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:07,692 INFO L168 Benchmark]: TraceAbstraction took 279974.79 ms. Allocated memory was 203.4 MB in the beginning and 366.5 MB in the end (delta: 163.1 MB). Free memory was 134.0 MB in the beginning and 159.9 MB in the end (delta: -25.9 MB). Peak memory consumption was 137.1 MB. Max. memory is 7.1 GB. [2020-10-21 21:34:07,694 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.84 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 728.87 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 100.0 MB in the beginning and 160.2 MB in the end (delta: -60.2 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 47.46 ms. Allocated memory is still 203.4 MB. Free memory was 160.2 MB in the beginning and 158.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.19 ms. Allocated memory is still 203.4 MB. Free memory was 158.2 MB in the beginning and 156.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 449.02 ms. Allocated memory is still 203.4 MB. Free memory was 156.2 MB in the beginning and 134.0 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 279974.79 ms. Allocated memory was 203.4 MB in the beginning and 366.5 MB in the end (delta: 163.1 MB). Free memory was 134.0 MB in the beginning and 159.9 MB in the end (delta: -25.9 MB). Peak memory consumption was 137.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 869 VarBasedMoverChecksPositive, 20 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 20 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 17 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.9s, 67 PlacesBefore, 20 PlacesAfterwards, 66 TransitionsBefore, 16 TransitionsAfterwards, 1272 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 13 ConcurrentYvCompositions, 3 ChoiceCompositions, 63 TotalNumberOfCompositions, 1215 MoverChecksTotal - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 12). Cancelled while BasicCegarLoop was constructing difference of abstraction (134states) and FLOYD_HOARE automaton (currently 30 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (160 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 279.8s, OverallIterations: 43, TraceHistogramMax: 5, AutomataDifference: 239.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 560 SDtfs, 4526 SDslu, 3636 SDs, 0 SdLazy, 2633 SolverSat, 786 SolverUnsat, 59 SolverUnknown, 0 SolverNotchecked, 116.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1090 GetRequests, 182 SyntacticMatches, 33 SemanticMatches, 875 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4629 ImplicationChecksByTransitivity, 146.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=156occurred in iteration=36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 42 MinimizatonAttempts, 1845 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 27.0s InterpolantComputationTime, 946 NumberOfCodeBlocks, 946 NumberOfCodeBlocksAsserted, 120 NumberOfCheckSat, 865 ConstructedInterpolants, 7 QuantifiedInterpolants, 79485 SizeOfPredicates, 38 NumberOfNonLiveVariables, 3696 ConjunctsInSsa, 346 ConjunctsInUnsatCore, 81 InterpolantComputations, 5 PerfectInterpolantSequences, 0/274 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown