/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 16:13:21,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 16:13:21,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 16:13:21,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 16:13:21,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 16:13:21,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 16:13:21,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 16:13:21,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 16:13:21,065 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 16:13:21,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 16:13:21,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 16:13:21,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 16:13:21,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 16:13:21,074 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 16:13:21,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 16:13:21,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 16:13:21,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 16:13:21,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 16:13:21,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 16:13:21,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 16:13:21,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 16:13:21,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 16:13:21,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 16:13:21,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 16:13:21,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 16:13:21,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 16:13:21,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 16:13:21,100 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 16:13:21,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 16:13:21,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 16:13:21,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 16:13:21,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 16:13:21,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 16:13:21,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 16:13:21,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 16:13:21,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 16:13:21,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 16:13:21,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 16:13:21,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 16:13:21,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 16:13:21,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 16:13:21,111 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-15 16:13:21,155 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 16:13:21,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 16:13:21,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 16:13:21,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 16:13:21,158 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 16:13:21,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 16:13:21,158 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 16:13:21,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 16:13:21,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 16:13:21,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 16:13:21,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 16:13:21,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 16:13:21,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 16:13:21,161 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 16:13:21,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 16:13:21,161 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 16:13:21,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 16:13:21,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 16:13:21,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 16:13:21,162 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 16:13:21,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 16:13:21,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 16:13:21,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 16:13:21,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 16:13:21,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 16:13:21,163 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 16:13:21,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 16:13:21,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 16:13:21,164 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 16:13:21,164 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 16:13:21,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 16:13:21,485 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 16:13:21,490 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 16:13:21,493 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 16:13:21,494 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 16:13:21,495 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-10-15 16:13:21,569 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4384a9278/aca82250fe6b4d28a765c2d1ac27b2ce/FLAG814219b52 [2020-10-15 16:13:22,078 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 16:13:22,079 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-10-15 16:13:22,092 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4384a9278/aca82250fe6b4d28a765c2d1ac27b2ce/FLAG814219b52 [2020-10-15 16:13:22,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4384a9278/aca82250fe6b4d28a765c2d1ac27b2ce [2020-10-15 16:13:22,390 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 16:13:22,393 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 16:13:22,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 16:13:22,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 16:13:22,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 16:13:22,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:22,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@727c3d86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22, skipping insertion in model container [2020-10-15 16:13:22,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:22,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 16:13:22,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 16:13:22,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 16:13:22,881 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 16:13:22,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 16:13:22,993 INFO L208 MainTranslator]: Completed translation [2020-10-15 16:13:22,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22 WrapperNode [2020-10-15 16:13:22,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 16:13:22,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 16:13:22,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 16:13:22,995 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 16:13:23,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:23,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:23,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 16:13:23,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 16:13:23,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 16:13:23,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 16:13:23,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:23,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:23,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:23,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:23,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:23,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:23,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... [2020-10-15 16:13:23,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 16:13:23,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 16:13:23,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 16:13:23,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 16:13:23,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 16:13:23,144 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-15 16:13:23,144 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-15 16:13:23,144 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-15 16:13:23,144 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-15 16:13:23,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 16:13:23,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-15 16:13:23,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 16:13:23,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 16:13:23,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-15 16:13:23,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 16:13:23,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 16:13:23,147 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 16:13:23,440 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 16:13:23,440 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 16:13:23,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:13:23 BoogieIcfgContainer [2020-10-15 16:13:23,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 16:13:23,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 16:13:23,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 16:13:23,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 16:13:23,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 04:13:22" (1/3) ... [2020-10-15 16:13:23,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45b41822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:13:23, skipping insertion in model container [2020-10-15 16:13:23,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:13:22" (2/3) ... [2020-10-15 16:13:23,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45b41822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 04:13:23, skipping insertion in model container [2020-10-15 16:13:23,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:13:23" (3/3) ... [2020-10-15 16:13:23,452 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2020-10-15 16:13:23,466 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 16:13:23,466 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 16:13:23,475 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 16:13:23,476 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 16:13:23,532 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,533 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,533 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,533 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,534 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,534 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,534 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,535 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,535 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,535 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,536 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,536 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,536 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,537 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,537 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,537 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,538 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,538 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,538 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,538 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,539 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,539 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,539 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,550 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,551 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,551 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,551 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,551 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,552 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,552 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,558 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,558 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,558 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,558 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,559 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,559 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,565 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,566 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,566 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,566 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,566 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,567 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 16:13:23,585 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 16:13:23,606 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 16:13:23,607 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 16:13:23,607 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 16:13:23,607 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 16:13:23,607 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 16:13:23,607 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 16:13:23,607 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 16:13:23,608 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 16:13:23,621 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 16:13:23,623 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-15 16:13:23,626 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-15 16:13:23,628 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-15 16:13:23,675 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-15 16:13:23,675 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 16:13:23,681 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-15 16:13:23,683 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-15 16:13:24,740 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-15 16:13:24,837 INFO L132 LiptonReduction]: Checked pairs total: 943 [2020-10-15 16:13:24,837 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-15 16:13:24,844 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-15 16:13:24,878 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-15 16:13:24,881 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-15 16:13:24,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-15 16:13:24,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:24,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-15 16:13:24,892 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:24,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:24,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-10-15 16:13:24,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:24,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716416079] [2020-10-15 16:13:24,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:25,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716416079] [2020-10-15 16:13:25,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:25,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 16:13:25,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810275090] [2020-10-15 16:13:25,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 16:13:25,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:25,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 16:13:25,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 16:13:25,185 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-15 16:13:25,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:25,259 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-15 16:13:25,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 16:13:25,261 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-15 16:13:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:25,274 INFO L225 Difference]: With dead ends: 83 [2020-10-15 16:13:25,274 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 16:13:25,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:25,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 16:13:25,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-15 16:13:25,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 16:13:25,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-15 16:13:25,320 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-15 16:13:25,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:25,320 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-15 16:13:25,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 16:13:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-15 16:13:25,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 16:13:25,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:25,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:25,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 16:13:25,322 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:25,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:25,323 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-10-15 16:13:25,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:25,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502865147] [2020-10-15 16:13:25,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:25,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502865147] [2020-10-15 16:13:25,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:25,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 16:13:25,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028485760] [2020-10-15 16:13:25,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 16:13:25,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:25,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 16:13:25,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:25,419 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-15 16:13:25,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:25,480 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-15 16:13:25,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:25,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 16:13:25,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:25,482 INFO L225 Difference]: With dead ends: 80 [2020-10-15 16:13:25,483 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 16:13:25,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 16:13:25,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 16:13:25,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-15 16:13:25,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 16:13:25,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-15 16:13:25,493 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-15 16:13:25,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:25,495 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-15 16:13:25,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 16:13:25,495 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-15 16:13:25,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 16:13:25,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:25,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:25,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 16:13:25,496 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:25,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:25,497 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-10-15 16:13:25,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:25,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362059342] [2020-10-15 16:13:25,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:25,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362059342] [2020-10-15 16:13:25,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:25,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 16:13:25,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826701906] [2020-10-15 16:13:25,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 16:13:25,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:25,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 16:13:25,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:25,568 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-15 16:13:25,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:25,595 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-15 16:13:25,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 16:13:25,595 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 16:13:25,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:25,597 INFO L225 Difference]: With dead ends: 73 [2020-10-15 16:13:25,597 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 16:13:25,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:25,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 16:13:25,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-15 16:13:25,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 16:13:25,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-15 16:13:25,607 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-15 16:13:25,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:25,607 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-15 16:13:25,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 16:13:25,608 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-15 16:13:25,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 16:13:25,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:25,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:25,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 16:13:25,609 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:25,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:25,610 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-10-15 16:13:25,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:25,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697970335] [2020-10-15 16:13:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:25,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697970335] [2020-10-15 16:13:25,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:25,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 16:13:25,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524326394] [2020-10-15 16:13:25,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 16:13:25,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:25,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 16:13:25,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 16:13:25,696 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-15 16:13:25,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:25,757 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-15 16:13:25,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:25,758 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 16:13:25,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:25,759 INFO L225 Difference]: With dead ends: 86 [2020-10-15 16:13:25,759 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 16:13:25,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 16:13:25,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 16:13:25,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-15 16:13:25,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 16:13:25,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-15 16:13:25,770 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-15 16:13:25,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:25,770 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-15 16:13:25,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 16:13:25,771 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-15 16:13:25,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 16:13:25,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:25,772 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:25,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 16:13:25,772 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:25,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:25,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-10-15 16:13:25,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:25,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778788549] [2020-10-15 16:13:25,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:25,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778788549] [2020-10-15 16:13:25,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16963195] [2020-10-15 16:13:25,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:25,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:25,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:25,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:13:25,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:26,022 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:26,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:26,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-15 16:13:26,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339386178] [2020-10-15 16:13:26,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 16:13:26,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:26,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 16:13:26,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:13:26,047 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-15 16:13:26,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:26,120 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-15 16:13:26,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:26,121 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-15 16:13:26,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:26,122 INFO L225 Difference]: With dead ends: 101 [2020-10-15 16:13:26,122 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 16:13:26,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:26,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 16:13:26,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-15 16:13:26,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 16:13:26,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-15 16:13:26,131 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-15 16:13:26,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:26,132 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-15 16:13:26,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 16:13:26,132 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-15 16:13:26,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 16:13:26,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:26,133 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:26,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:26,349 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:26,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:26,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-10-15 16:13:26,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:26,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385007303] [2020-10-15 16:13:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:26,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385007303] [2020-10-15 16:13:26,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524666607] [2020-10-15 16:13:26,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:26,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:26,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:26,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:13:26,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:26,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:26,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 16:13:26,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839927004] [2020-10-15 16:13:26,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:13:26,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:26,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:13:26,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:26,617 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-15 16:13:26,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:26,653 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-15 16:13:26,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 16:13:26,654 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 16:13:26,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:26,655 INFO L225 Difference]: With dead ends: 84 [2020-10-15 16:13:26,655 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 16:13:26,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:26,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 16:13:26,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-15 16:13:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 16:13:26,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-15 16:13:26,673 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-15 16:13:26,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:26,673 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-15 16:13:26,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:13:26,673 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-15 16:13:26,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 16:13:26,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:26,674 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:26,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:26,889 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:26,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:26,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-10-15 16:13:26,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:26,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636219346] [2020-10-15 16:13:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:26,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636219346] [2020-10-15 16:13:26,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012649936] [2020-10-15 16:13:26,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:27,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:27,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:27,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:13:27,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:27,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:27,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 16:13:27,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835654607] [2020-10-15 16:13:27,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:13:27,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:27,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:13:27,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:27,077 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-15 16:13:27,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:27,130 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-15 16:13:27,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:27,131 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 16:13:27,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:27,132 INFO L225 Difference]: With dead ends: 90 [2020-10-15 16:13:27,132 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 16:13:27,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-15 16:13:27,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 16:13:27,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-15 16:13:27,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 16:13:27,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-15 16:13:27,140 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-15 16:13:27,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:27,140 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-15 16:13:27,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:13:27,141 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-15 16:13:27,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 16:13:27,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:27,142 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:27,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:27,357 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:27,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:27,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-10-15 16:13:27,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:27,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450915142] [2020-10-15 16:13:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:27,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450915142] [2020-10-15 16:13:27,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598855141] [2020-10-15 16:13:27,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:27,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:27,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:27,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 16:13:27,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:27,548 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:27,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:27,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 16:13:27,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737592783] [2020-10-15 16:13:27,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:13:27,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:27,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:13:27,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:27,563 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-15 16:13:27,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:27,656 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-15 16:13:27,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:27,657 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 16:13:27,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:27,658 INFO L225 Difference]: With dead ends: 99 [2020-10-15 16:13:27,658 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 16:13:27,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:13:27,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 16:13:27,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-15 16:13:27,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 16:13:27,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-15 16:13:27,665 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-15 16:13:27,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:27,665 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-15 16:13:27,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:13:27,666 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-15 16:13:27,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:27,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:27,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:27,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:27,875 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:27,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:27,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-10-15 16:13:27,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:27,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277460800] [2020-10-15 16:13:27,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:27,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277460800] [2020-10-15 16:13:27,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:27,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:13:27,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641387364] [2020-10-15 16:13:27,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:13:27,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:27,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:13:27,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:27,946 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-15 16:13:27,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:27,979 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-15 16:13:27,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 16:13:27,980 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:13:27,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:27,981 INFO L225 Difference]: With dead ends: 92 [2020-10-15 16:13:27,981 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 16:13:27,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:27,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 16:13:27,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-15 16:13:27,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 16:13:27,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-15 16:13:27,988 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-15 16:13:27,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:27,988 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-15 16:13:27,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:13:27,988 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-15 16:13:27,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:27,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:27,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:27,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 16:13:27,990 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:27,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:27,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-10-15 16:13:27,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:27,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504290596] [2020-10-15 16:13:27,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:28,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504290596] [2020-10-15 16:13:28,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:28,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:13:28,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740128162] [2020-10-15 16:13:28,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:13:28,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:28,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:13:28,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:28,072 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-15 16:13:28,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:28,136 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-15 16:13:28,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:28,137 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:13:28,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:28,138 INFO L225 Difference]: With dead ends: 100 [2020-10-15 16:13:28,138 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 16:13:28,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 16:13:28,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 16:13:28,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-15 16:13:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 16:13:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-15 16:13:28,150 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-15 16:13:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:28,156 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-15 16:13:28,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:13:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-15 16:13:28,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:28,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:28,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:28,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 16:13:28,158 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:28,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:28,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-10-15 16:13:28,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:28,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065792955] [2020-10-15 16:13:28,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:28,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065792955] [2020-10-15 16:13:28,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:28,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:13:28,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743123333] [2020-10-15 16:13:28,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:13:28,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:28,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:13:28,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:28,239 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-15 16:13:28,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:28,306 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-15 16:13:28,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:28,307 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:13:28,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:28,308 INFO L225 Difference]: With dead ends: 105 [2020-10-15 16:13:28,308 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:13:28,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:28,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:13:28,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-15 16:13:28,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:13:28,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-15 16:13:28,318 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-15 16:13:28,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:28,319 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-15 16:13:28,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:13:28,319 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-15 16:13:28,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:28,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:28,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:28,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 16:13:28,321 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:28,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:28,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-10-15 16:13:28,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:28,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804086] [2020-10-15 16:13:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:28,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804086] [2020-10-15 16:13:28,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 16:13:28,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 16:13:28,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596006253] [2020-10-15 16:13:28,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 16:13:28,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:28,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 16:13:28,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 16:13:28,392 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-15 16:13:28,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:28,473 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-15 16:13:28,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:28,473 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 16:13:28,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:28,474 INFO L225 Difference]: With dead ends: 105 [2020-10-15 16:13:28,475 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 16:13:28,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-15 16:13:28,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 16:13:28,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-15 16:13:28,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 16:13:28,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-15 16:13:28,482 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-15 16:13:28,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:28,482 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-15 16:13:28,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 16:13:28,482 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-15 16:13:28,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:28,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:28,483 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:28,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 16:13:28,483 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:28,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-10-15 16:13:28,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:28,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361936071] [2020-10-15 16:13:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:28,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361936071] [2020-10-15 16:13:28,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635061408] [2020-10-15 16:13:28,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:28,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:28,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:28,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:28,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:28,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:28,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:28,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-15 16:13:28,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881439102] [2020-10-15 16:13:28,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 16:13:28,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:28,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 16:13:28,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:13:28,700 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-15 16:13:28,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:28,802 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-15 16:13:28,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:28,803 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-15 16:13:28,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:28,804 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:13:28,804 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:13:28,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:13:28,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:13:28,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-15 16:13:28,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 16:13:28,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-15 16:13:28,809 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-15 16:13:28,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:28,810 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-15 16:13:28,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 16:13:28,810 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-15 16:13:28,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:28,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:28,811 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:29,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 16:13:29,011 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:29,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:29,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-10-15 16:13:29,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:29,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81299168] [2020-10-15 16:13:29,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:29,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81299168] [2020-10-15 16:13:29,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658060037] [2020-10-15 16:13:29,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:29,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:29,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:29,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:29,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:29,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:29,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:29,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070731093] [2020-10-15 16:13:29,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:29,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:29,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:29,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:29,274 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-15 16:13:29,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:29,316 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-15 16:13:29,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:29,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 16:13:29,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:29,319 INFO L225 Difference]: With dead ends: 108 [2020-10-15 16:13:29,319 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 16:13:29,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:29,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 16:13:29,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-15 16:13:29,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 16:13:29,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-15 16:13:29,327 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-15 16:13:29,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:29,328 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-15 16:13:29,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:29,328 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-15 16:13:29,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:29,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:29,329 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:29,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:29,542 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:29,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:29,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-10-15 16:13:29,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:29,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786055996] [2020-10-15 16:13:29,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:29,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786055996] [2020-10-15 16:13:29,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488611420] [2020-10-15 16:13:29,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:29,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:29,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:29,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:29,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:29,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:29,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348099287] [2020-10-15 16:13:29,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:29,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:29,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:29,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:29,774 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-15 16:13:29,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:29,839 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-15 16:13:29,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:29,839 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 16:13:29,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:29,844 INFO L225 Difference]: With dead ends: 116 [2020-10-15 16:13:29,844 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 16:13:29,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:13:29,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 16:13:29,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-15 16:13:29,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 16:13:29,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-15 16:13:29,851 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-15 16:13:29,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:29,852 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-15 16:13:29,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:29,852 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-15 16:13:29,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:29,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:29,853 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:30,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 16:13:30,065 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:30,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:30,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-10-15 16:13:30,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:30,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771736082] [2020-10-15 16:13:30,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:30,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771736082] [2020-10-15 16:13:30,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266346166] [2020-10-15 16:13:30,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:30,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:30,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:30,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:30,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:30,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:30,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:30,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143216926] [2020-10-15 16:13:30,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:30,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:30,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:30,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:30,287 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-15 16:13:30,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:30,364 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-15 16:13:30,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:30,364 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 16:13:30,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:30,365 INFO L225 Difference]: With dead ends: 115 [2020-10-15 16:13:30,365 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 16:13:30,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:30,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 16:13:30,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-15 16:13:30,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:13:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-15 16:13:30,371 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-15 16:13:30,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:30,371 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-15 16:13:30,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:30,372 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-15 16:13:30,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 16:13:30,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:30,372 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:30,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 16:13:30,580 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:30,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:30,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-10-15 16:13:30,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:30,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935152870] [2020-10-15 16:13:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:30,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935152870] [2020-10-15 16:13:30,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117067601] [2020-10-15 16:13:30,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:30,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:30,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:30,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:30,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:30,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:30,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:30,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:30,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478440443] [2020-10-15 16:13:30,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:30,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:30,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:30,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:30,778 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-15 16:13:30,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:30,900 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-15 16:13:30,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:30,901 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 16:13:30,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:30,902 INFO L225 Difference]: With dead ends: 124 [2020-10-15 16:13:30,902 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 16:13:30,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:13:30,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 16:13:30,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-15 16:13:30,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 16:13:30,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-15 16:13:30,908 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-15 16:13:30,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:30,908 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-15 16:13:30,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:30,908 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-15 16:13:30,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:30,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:30,909 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:31,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 16:13:31,110 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:31,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:31,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-10-15 16:13:31,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:31,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055098778] [2020-10-15 16:13:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:31,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055098778] [2020-10-15 16:13:31,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476779313] [2020-10-15 16:13:31,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:31,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:31,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:31,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:31,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:31,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:31,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:31,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395825911] [2020-10-15 16:13:31,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:31,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:31,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:31,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:31,333 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-15 16:13:31,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:31,375 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-15 16:13:31,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 16:13:31,376 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:31,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:31,377 INFO L225 Difference]: With dead ends: 113 [2020-10-15 16:13:31,377 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 16:13:31,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:31,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 16:13:31,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-15 16:13:31,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 16:13:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-15 16:13:31,381 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-15 16:13:31,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:31,382 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-15 16:13:31,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:31,382 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-15 16:13:31,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:31,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:31,383 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:31,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 16:13:31,584 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:31,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:31,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-10-15 16:13:31,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:31,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124414385] [2020-10-15 16:13:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:31,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124414385] [2020-10-15 16:13:31,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672945579] [2020-10-15 16:13:31,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:31,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:31,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:31,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:31,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:31,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:31,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:31,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:31,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293053148] [2020-10-15 16:13:31,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:31,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:31,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:31,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:31,783 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-15 16:13:31,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:31,852 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-15 16:13:31,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:31,852 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:31,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:31,853 INFO L225 Difference]: With dead ends: 118 [2020-10-15 16:13:31,853 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 16:13:31,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:31,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 16:13:31,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-15 16:13:31,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 16:13:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-15 16:13:31,858 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-15 16:13:31,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:31,858 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-15 16:13:31,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:31,858 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-15 16:13:31,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:31,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:31,859 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:32,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:32,060 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:32,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:32,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-10-15 16:13:32,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:32,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036033130] [2020-10-15 16:13:32,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:32,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036033130] [2020-10-15 16:13:32,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411852209] [2020-10-15 16:13:32,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:32,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:32,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:32,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:32,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:32,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9288224] [2020-10-15 16:13:32,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:32,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:32,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:32,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:32,271 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-15 16:13:32,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:32,375 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-15 16:13:32,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:32,376 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:32,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:32,376 INFO L225 Difference]: With dead ends: 119 [2020-10-15 16:13:32,376 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 16:13:32,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:32,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 16:13:32,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-15 16:13:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:13:32,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-15 16:13:32,381 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-15 16:13:32,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:32,382 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-15 16:13:32,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:32,382 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-15 16:13:32,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:32,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:32,383 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:32,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:32,594 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:32,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:32,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-10-15 16:13:32,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:32,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983920504] [2020-10-15 16:13:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:32,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983920504] [2020-10-15 16:13:32,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430944013] [2020-10-15 16:13:32,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:32,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:32,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:32,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:32,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:32,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:32,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:32,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6777038] [2020-10-15 16:13:32,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:32,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:32,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:32,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:32,797 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-15 16:13:32,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:32,854 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-15 16:13:32,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:32,855 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:32,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:32,856 INFO L225 Difference]: With dead ends: 122 [2020-10-15 16:13:32,856 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 16:13:32,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-15 16:13:32,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 16:13:32,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-15 16:13:32,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 16:13:32,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-15 16:13:32,860 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-15 16:13:32,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:32,860 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-15 16:13:32,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:32,861 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-15 16:13:32,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:32,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:32,861 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:33,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-15 16:13:33,071 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:33,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:33,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-10-15 16:13:33,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:33,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135026793] [2020-10-15 16:13:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:33,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135026793] [2020-10-15 16:13:33,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204004947] [2020-10-15 16:13:33,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:33,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:33,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:33,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:33,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:33,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:33,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:33,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875031793] [2020-10-15 16:13:33,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:33,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:33,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:33,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:33,244 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-15 16:13:33,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:33,347 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-15 16:13:33,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:33,348 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:33,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:33,349 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:13:33,349 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:13:33,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:13:33,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-15 16:13:33,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:13:33,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-15 16:13:33,353 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-15 16:13:33,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:33,354 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-15 16:13:33,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:33,354 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-15 16:13:33,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:33,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:33,355 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:33,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:33,564 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:33,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:33,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-10-15 16:13:33,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:33,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799275719] [2020-10-15 16:13:33,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:33,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799275719] [2020-10-15 16:13:33,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000620286] [2020-10-15 16:13:33,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:33,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:33,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:33,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:33,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:33,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:33,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:33,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230618676] [2020-10-15 16:13:33,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:33,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:33,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:33,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:33,768 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-15 16:13:33,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:33,837 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-15 16:13:33,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:33,838 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:33,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:33,839 INFO L225 Difference]: With dead ends: 123 [2020-10-15 16:13:33,840 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 16:13:33,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:33,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 16:13:33,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-15 16:13:33,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 16:13:33,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-15 16:13:33,845 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-15 16:13:33,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:33,845 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-15 16:13:33,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:33,846 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-15 16:13:33,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:33,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:33,846 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:34,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-15 16:13:34,058 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:34,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:34,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-10-15 16:13:34,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:34,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783325444] [2020-10-15 16:13:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:34,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783325444] [2020-10-15 16:13:34,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973220401] [2020-10-15 16:13:34,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:34,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:34,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:34,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:34,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:34,224 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:34,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:34,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:34,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370036967] [2020-10-15 16:13:34,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:34,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:34,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:34,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:34,266 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-15 16:13:34,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:34,447 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-15 16:13:34,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:34,451 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:34,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:34,452 INFO L225 Difference]: With dead ends: 133 [2020-10-15 16:13:34,452 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:13:34,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:34,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:13:34,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-15 16:13:34,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-15 16:13:34,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-15 16:13:34,456 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-15 16:13:34,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:34,456 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-15 16:13:34,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:34,457 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-15 16:13:34,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:34,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:34,457 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:34,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:34,668 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:34,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:34,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-10-15 16:13:34,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:34,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899844494] [2020-10-15 16:13:34,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:34,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899844494] [2020-10-15 16:13:34,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548120552] [2020-10-15 16:13:34,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:34,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:34,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:34,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:34,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:34,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:34,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:34,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683240084] [2020-10-15 16:13:34,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:34,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:34,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:34,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:34,859 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-15 16:13:34,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:34,985 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-15 16:13:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:34,986 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:34,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:34,987 INFO L225 Difference]: With dead ends: 127 [2020-10-15 16:13:34,988 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 16:13:34,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:13:34,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 16:13:34,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-15 16:13:34,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:13:34,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-15 16:13:34,992 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-15 16:13:34,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:34,992 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-15 16:13:34,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:34,993 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-15 16:13:34,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:34,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:34,993 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:35,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-15 16:13:35,205 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:35,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:35,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-10-15 16:13:35,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:35,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52677036] [2020-10-15 16:13:35,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:35,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52677036] [2020-10-15 16:13:35,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356545766] [2020-10-15 16:13:35,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:35,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:35,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:35,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:35,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:35,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:35,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:35,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769731630] [2020-10-15 16:13:35,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:35,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:35,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:35,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:35,362 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-15 16:13:35,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:35,574 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-15 16:13:35,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:13:35,575 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:35,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:35,576 INFO L225 Difference]: With dead ends: 141 [2020-10-15 16:13:35,576 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 16:13:35,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:13:35,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 16:13:35,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-15 16:13:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 16:13:35,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-15 16:13:35,582 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-15 16:13:35,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:35,583 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-15 16:13:35,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-15 16:13:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:35,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:35,583 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:35,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 16:13:35,786 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:35,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:35,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-10-15 16:13:35,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:35,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813131390] [2020-10-15 16:13:35,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:35,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813131390] [2020-10-15 16:13:35,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085613565] [2020-10-15 16:13:35,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:35,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:35,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:35,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:35,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:35,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:35,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:35,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:35,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000489032] [2020-10-15 16:13:35,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:35,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:35,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:35,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:35,958 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-15 16:13:36,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:36,109 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-15 16:13:36,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:36,109 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:36,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:36,111 INFO L225 Difference]: With dead ends: 136 [2020-10-15 16:13:36,111 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 16:13:36,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:36,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 16:13:36,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-15 16:13:36,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 16:13:36,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-15 16:13:36,116 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-15 16:13:36,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:36,116 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-15 16:13:36,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:36,116 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-15 16:13:36,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:36,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:36,117 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:36,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-15 16:13:36,327 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:36,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:36,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-10-15 16:13:36,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:36,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902159492] [2020-10-15 16:13:36,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:36,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902159492] [2020-10-15 16:13:36,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441036492] [2020-10-15 16:13:36,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:36,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:36,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:36,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:36,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:36,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:36,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:36,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708608279] [2020-10-15 16:13:36,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:36,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:36,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:36,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:36,517 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-15 16:13:36,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:36,601 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-15 16:13:36,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:36,601 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:36,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:36,602 INFO L225 Difference]: With dead ends: 130 [2020-10-15 16:13:36,603 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 16:13:36,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:36,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 16:13:36,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-15 16:13:36,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:13:36,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-15 16:13:36,607 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-15 16:13:36,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:36,607 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-15 16:13:36,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:36,607 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-15 16:13:36,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:36,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:36,608 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:36,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 16:13:36,819 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:36,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:36,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-10-15 16:13:36,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:36,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168121764] [2020-10-15 16:13:36,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:36,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168121764] [2020-10-15 16:13:36,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435877603] [2020-10-15 16:13:36,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:36,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:36,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:36,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:36,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:37,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:37,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:37,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294632819] [2020-10-15 16:13:37,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:37,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:37,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:37,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:37,003 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-15 16:13:37,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:37,131 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-15 16:13:37,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:37,131 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:37,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:37,132 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:13:37,132 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 16:13:37,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:13:37,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 16:13:37,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-15 16:13:37,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 16:13:37,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-15 16:13:37,136 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-15 16:13:37,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:37,136 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-15 16:13:37,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:37,137 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-15 16:13:37,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:37,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:37,137 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:37,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-15 16:13:37,345 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:37,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:37,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-10-15 16:13:37,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:37,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407151584] [2020-10-15 16:13:37,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:37,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407151584] [2020-10-15 16:13:37,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638873476] [2020-10-15 16:13:37,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:37,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:37,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:37,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:37,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:37,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:37,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:37,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:37,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:37,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958563944] [2020-10-15 16:13:37,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:37,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:37,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:37,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:37,520 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-15 16:13:37,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:37,640 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-15 16:13:37,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:37,640 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:37,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:37,642 INFO L225 Difference]: With dead ends: 131 [2020-10-15 16:13:37,642 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 16:13:37,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:37,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 16:13:37,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-15 16:13:37,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 16:13:37,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-15 16:13:37,646 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-15 16:13:37,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:37,647 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-15 16:13:37,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:37,647 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-15 16:13:37,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:37,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:37,647 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:37,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:37,858 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:37,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:37,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-10-15 16:13:37,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:37,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72740177] [2020-10-15 16:13:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:37,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72740177] [2020-10-15 16:13:37,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145965500] [2020-10-15 16:13:37,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:37,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:37,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:37,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:37,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:38,001 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:38,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:38,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:38,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326212639] [2020-10-15 16:13:38,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:38,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:38,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:38,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:38,009 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-15 16:13:38,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:38,216 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-15 16:13:38,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:13:38,217 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:38,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:38,218 INFO L225 Difference]: With dead ends: 145 [2020-10-15 16:13:38,218 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 16:13:38,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:13:38,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 16:13:38,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-15 16:13:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 16:13:38,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-15 16:13:38,223 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-15 16:13:38,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:38,223 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-15 16:13:38,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:38,224 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-15 16:13:38,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:38,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:38,224 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:38,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-15 16:13:38,436 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:38,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:38,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-10-15 16:13:38,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:38,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710655513] [2020-10-15 16:13:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:38,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710655513] [2020-10-15 16:13:38,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823014421] [2020-10-15 16:13:38,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:38,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:13:38,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:38,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:38,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:38,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 16:13:38,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203605663] [2020-10-15 16:13:38,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:13:38,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:38,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:13:38,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:13:38,642 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-15 16:13:38,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:38,859 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-15 16:13:38,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:38,859 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 16:13:38,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:38,861 INFO L225 Difference]: With dead ends: 135 [2020-10-15 16:13:38,861 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 16:13:38,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:38,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 16:13:38,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-15 16:13:38,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 16:13:38,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-15 16:13:38,867 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-15 16:13:38,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:38,867 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-15 16:13:38,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:13:38,868 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-15 16:13:38,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:38,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:38,869 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:39,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:39,081 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:39,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:39,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-10-15 16:13:39,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:39,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830856658] [2020-10-15 16:13:39,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:39,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830856658] [2020-10-15 16:13:39,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54313009] [2020-10-15 16:13:39,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:39,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:39,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:39,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:39,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:39,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:39,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:39,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-15 16:13:39,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756231135] [2020-10-15 16:13:39,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 16:13:39,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:39,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 16:13:39,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:39,335 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-15 16:13:39,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:39,436 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-15 16:13:39,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:39,437 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-15 16:13:39,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:39,438 INFO L225 Difference]: With dead ends: 143 [2020-10-15 16:13:39,438 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:13:39,438 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 [2020-10-15 16:13:39,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:13:39,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-15 16:13:39,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 16:13:39,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-15 16:13:39,442 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-15 16:13:39,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:39,443 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-15 16:13:39,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 16:13:39,443 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-15 16:13:39,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:39,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:39,444 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:39,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-15 16:13:39,653 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:39,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:39,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-10-15 16:13:39,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:39,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419311745] [2020-10-15 16:13:39,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:39,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419311745] [2020-10-15 16:13:39,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729015531] [2020-10-15 16:13:39,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:39,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:39,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:39,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:39,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:39,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:39,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:39,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709825116] [2020-10-15 16:13:39,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:39,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:39,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:39,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:39,893 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-15 16:13:39,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:39,935 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-15 16:13:39,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:39,936 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:39,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:39,937 INFO L225 Difference]: With dead ends: 132 [2020-10-15 16:13:39,937 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 16:13:39,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:39,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 16:13:39,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-15 16:13:39,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:13:39,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-15 16:13:39,941 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-15 16:13:39,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:39,941 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-15 16:13:39,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:39,942 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-15 16:13:39,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:39,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:39,943 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:40,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-15 16:13:40,143 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:40,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:40,144 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-10-15 16:13:40,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:40,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271366770] [2020-10-15 16:13:40,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:40,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:40,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271366770] [2020-10-15 16:13:40,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128587612] [2020-10-15 16:13:40,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:40,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:13:40,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:40,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:40,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:40,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:40,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:40,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094402886] [2020-10-15 16:13:40,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:40,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:40,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:40,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:40,425 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-15 16:13:40,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:40,475 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-15 16:13:40,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:40,475 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:40,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:40,476 INFO L225 Difference]: With dead ends: 143 [2020-10-15 16:13:40,477 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 16:13:40,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:40,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 16:13:40,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-15 16:13:40,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 16:13:40,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-15 16:13:40,480 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-15 16:13:40,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:40,481 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-15 16:13:40,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:40,481 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-15 16:13:40,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:40,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:40,483 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:40,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-15 16:13:40,691 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:40,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:40,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-10-15 16:13:40,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:40,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511252747] [2020-10-15 16:13:40,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:40,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511252747] [2020-10-15 16:13:40,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037555861] [2020-10-15 16:13:40,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:40,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:13:40,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:40,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:40,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:40,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:40,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:40,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431739720] [2020-10-15 16:13:40,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:40,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:40,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:40,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:40,892 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-15 16:13:40,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:40,956 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-15 16:13:40,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:40,957 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:40,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:40,958 INFO L225 Difference]: With dead ends: 142 [2020-10-15 16:13:40,958 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 16:13:40,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:13:40,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 16:13:40,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-15 16:13:40,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-15 16:13:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-15 16:13:40,962 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-15 16:13:40,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:40,962 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-15 16:13:40,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:40,962 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-15 16:13:40,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:40,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:40,963 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:41,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-15 16:13:41,173 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:41,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:41,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-10-15 16:13:41,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:41,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790344726] [2020-10-15 16:13:41,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:41,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790344726] [2020-10-15 16:13:41,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678230764] [2020-10-15 16:13:41,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:41,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:41,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:41,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:41,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:41,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031757477] [2020-10-15 16:13:41,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:41,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:41,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:41,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:41,360 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-15 16:13:41,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:41,469 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-15 16:13:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:41,469 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:41,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:41,471 INFO L225 Difference]: With dead ends: 141 [2020-10-15 16:13:41,471 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 16:13:41,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:13:41,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 16:13:41,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-15 16:13:41,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 16:13:41,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-15 16:13:41,475 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-15 16:13:41,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:41,475 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-15 16:13:41,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:41,475 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-15 16:13:41,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 16:13:41,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:41,476 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:41,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-15 16:13:41,677 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:41,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:41,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-10-15 16:13:41,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:41,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556041021] [2020-10-15 16:13:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:41,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556041021] [2020-10-15 16:13:41,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862896350] [2020-10-15 16:13:41,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:41,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:41,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:41,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:41,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:41,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:41,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:41,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:41,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272272824] [2020-10-15 16:13:41,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:41,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:41,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:41,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:41,877 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-15 16:13:42,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:42,015 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-15 16:13:42,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:42,016 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 16:13:42,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:42,017 INFO L225 Difference]: With dead ends: 150 [2020-10-15 16:13:42,018 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 16:13:42,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:13:42,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 16:13:42,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-15 16:13:42,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-15 16:13:42,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-15 16:13:42,021 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-15 16:13:42,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:42,022 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-15 16:13:42,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:42,022 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-15 16:13:42,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:42,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:42,023 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:42,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:42,232 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:42,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:42,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-10-15 16:13:42,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:42,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813815953] [2020-10-15 16:13:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:42,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813815953] [2020-10-15 16:13:42,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898804604] [2020-10-15 16:13:42,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:42,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:42,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:42,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:42,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:42,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:42,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:42,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465805741] [2020-10-15 16:13:42,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:42,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:42,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:42,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:42,430 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-15 16:13:42,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:42,483 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-15 16:13:42,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 16:13:42,483 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:42,484 INFO L225 Difference]: With dead ends: 138 [2020-10-15 16:13:42,485 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 16:13:42,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:42,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 16:13:42,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-15 16:13:42,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-15 16:13:42,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-15 16:13:42,488 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-15 16:13:42,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:42,489 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-15 16:13:42,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:42,489 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-15 16:13:42,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:42,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:42,489 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:42,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 16:13:42,701 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:42,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:42,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-10-15 16:13:42,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:42,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760665336] [2020-10-15 16:13:42,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:42,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760665336] [2020-10-15 16:13:42,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385974219] [2020-10-15 16:13:42,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:42,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:42,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:42,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:42,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:42,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:42,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:42,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639332722] [2020-10-15 16:13:42,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:42,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:42,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:42,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:42,940 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-15 16:13:43,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:43,075 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-15 16:13:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:43,075 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:43,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:43,077 INFO L225 Difference]: With dead ends: 145 [2020-10-15 16:13:43,077 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 16:13:43,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:13:43,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 16:13:43,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-15 16:13:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-15 16:13:43,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-15 16:13:43,081 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-15 16:13:43,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:43,081 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-15 16:13:43,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:43,081 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-15 16:13:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:43,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:43,082 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:43,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 16:13:43,293 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:43,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:43,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-10-15 16:13:43,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:43,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33798530] [2020-10-15 16:13:43,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:43,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33798530] [2020-10-15 16:13:43,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67874357] [2020-10-15 16:13:43,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:43,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:43,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:43,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:43,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:43,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:43,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:43,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562241584] [2020-10-15 16:13:43,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:43,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:43,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:43,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:43,477 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-15 16:13:43,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:43,608 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-15 16:13:43,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:43,609 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:43,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:43,610 INFO L225 Difference]: With dead ends: 150 [2020-10-15 16:13:43,610 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 16:13:43,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:43,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 16:13:43,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-15 16:13:43,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-15 16:13:43,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-15 16:13:43,615 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-15 16:13:43,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:43,615 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-15 16:13:43,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:43,615 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-15 16:13:43,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:43,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:43,616 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:43,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:43,826 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:43,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:43,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-10-15 16:13:43,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:43,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392222667] [2020-10-15 16:13:43,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:43,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392222667] [2020-10-15 16:13:43,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644881372] [2020-10-15 16:13:43,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:43,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:13:43,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:43,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:43,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:44,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:44,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:44,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846256028] [2020-10-15 16:13:44,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:44,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:44,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:44,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:44,040 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-15 16:13:44,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:44,147 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-15 16:13:44,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:44,147 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:44,148 INFO L225 Difference]: With dead ends: 148 [2020-10-15 16:13:44,148 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 16:13:44,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:44,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 16:13:44,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-15 16:13:44,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-15 16:13:44,152 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-15 16:13:44,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:44,152 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-15 16:13:44,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:44,152 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-15 16:13:44,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:44,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:44,153 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:44,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-15 16:13:44,361 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:44,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:44,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-10-15 16:13:44,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:44,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83240136] [2020-10-15 16:13:44,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:44,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83240136] [2020-10-15 16:13:44,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163241654] [2020-10-15 16:13:44,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:44,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:44,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:44,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:44,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:44,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:44,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:44,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938229755] [2020-10-15 16:13:44,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:44,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:44,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:44,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:44,585 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-15 16:13:44,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:44,703 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-15 16:13:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:44,704 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:44,705 INFO L225 Difference]: With dead ends: 149 [2020-10-15 16:13:44,705 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 16:13:44,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 16:13:44,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-15 16:13:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:13:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-15 16:13:44,709 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-15 16:13:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:44,710 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-15 16:13:44,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-15 16:13:44,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:44,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:44,711 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:44,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:44,921 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:44,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:44,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-10-15 16:13:44,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:44,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913758338] [2020-10-15 16:13:44,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:45,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913758338] [2020-10-15 16:13:45,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382795461] [2020-10-15 16:13:45,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:45,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:45,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:45,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:45,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:45,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422255129] [2020-10-15 16:13:45,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:45,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:45,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:45,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:45,143 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-15 16:13:45,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:45,197 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-15 16:13:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:13:45,197 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:45,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:45,199 INFO L225 Difference]: With dead ends: 152 [2020-10-15 16:13:45,199 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 16:13:45,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-15 16:13:45,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 16:13:45,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-15 16:13:45,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 16:13:45,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-15 16:13:45,203 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-15 16:13:45,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:45,203 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-15 16:13:45,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:45,204 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-15 16:13:45,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:45,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:45,205 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:45,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-15 16:13:45,415 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:45,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:45,415 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-10-15 16:13:45,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:45,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116371418] [2020-10-15 16:13:45,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:45,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116371418] [2020-10-15 16:13:45,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170405971] [2020-10-15 16:13:45,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:45,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:45,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:45,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:45,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:45,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:45,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:45,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539667642] [2020-10-15 16:13:45,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:45,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:45,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:45,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:45,659 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-15 16:13:45,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:45,806 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-15 16:13:45,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:45,807 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:45,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:45,808 INFO L225 Difference]: With dead ends: 153 [2020-10-15 16:13:45,809 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 16:13:45,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:13:45,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 16:13:45,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-15 16:13:45,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-15 16:13:45,814 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-15 16:13:45,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:45,814 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-15 16:13:45,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:45,814 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-15 16:13:45,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:45,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:45,815 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:46,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-15 16:13:46,026 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:46,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:46,026 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-10-15 16:13:46,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:46,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368577002] [2020-10-15 16:13:46,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:46,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368577002] [2020-10-15 16:13:46,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960758087] [2020-10-15 16:13:46,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:46,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:46,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:46,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:46,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:46,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:46,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:46,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661304305] [2020-10-15 16:13:46,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:46,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:46,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:46,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:46,211 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-15 16:13:46,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:46,347 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 16:13:46,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:46,348 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:46,349 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:13:46,349 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 16:13:46,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:13:46,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 16:13:46,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-15 16:13:46,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 16:13:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-15 16:13:46,354 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-15 16:13:46,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:46,354 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-15 16:13:46,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:46,354 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-15 16:13:46,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:46,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:46,355 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:46,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-15 16:13:46,565 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:46,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:46,565 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-10-15 16:13:46,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:46,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596533611] [2020-10-15 16:13:46,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:46,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596533611] [2020-10-15 16:13:46,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189114703] [2020-10-15 16:13:46,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:46,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:46,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:46,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:46,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:46,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:46,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:46,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581363995] [2020-10-15 16:13:46,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:46,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:46,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:46,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:46,769 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-15 16:13:46,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:46,849 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-15 16:13:46,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:13:46,850 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:46,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:46,851 INFO L225 Difference]: With dead ends: 148 [2020-10-15 16:13:46,851 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 16:13:46,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:13:46,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 16:13:46,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-15 16:13:46,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:13:46,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-15 16:13:46,855 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-15 16:13:46,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:46,856 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-15 16:13:46,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:46,856 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-15 16:13:46,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:46,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:46,857 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:47,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-15 16:13:47,066 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:47,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:47,066 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-10-15 16:13:47,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:47,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900994055] [2020-10-15 16:13:47,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:47,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900994055] [2020-10-15 16:13:47,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084845374] [2020-10-15 16:13:47,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:47,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:47,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:47,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:47,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:47,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:47,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:47,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:47,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871793750] [2020-10-15 16:13:47,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:47,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:47,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:47,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:47,269 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-15 16:13:47,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:47,428 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-15 16:13:47,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:47,428 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:47,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:47,430 INFO L225 Difference]: With dead ends: 157 [2020-10-15 16:13:47,430 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 16:13:47,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:13:47,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 16:13:47,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-15 16:13:47,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:47,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-15 16:13:47,434 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-15 16:13:47,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:47,434 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-15 16:13:47,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:47,434 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-15 16:13:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:47,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:47,435 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:47,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:47,643 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:47,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:47,643 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-10-15 16:13:47,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:47,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575544936] [2020-10-15 16:13:47,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:47,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575544936] [2020-10-15 16:13:47,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698362846] [2020-10-15 16:13:47,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:47,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:47,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:47,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:47,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:47,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:47,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:47,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701025297] [2020-10-15 16:13:47,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:47,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:47,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:47,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:47,842 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-10-15 16:13:47,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:47,943 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-15 16:13:47,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:13:47,944 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:47,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:47,946 INFO L225 Difference]: With dead ends: 149 [2020-10-15 16:13:47,946 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 16:13:47,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:13:47,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 16:13:47,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-15 16:13:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 16:13:47,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 16:13:47,950 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 16:13:47,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:47,951 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 16:13:47,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:47,951 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 16:13:47,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:47,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:47,951 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:48,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-15 16:13:48,163 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:48,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:48,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-10-15 16:13:48,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:48,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688979195] [2020-10-15 16:13:48,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:48,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688979195] [2020-10-15 16:13:48,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088651067] [2020-10-15 16:13:48,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:48,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:48,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:48,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:48,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:48,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:48,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455250771] [2020-10-15 16:13:48,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:48,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:48,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:48,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:48,419 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 16:13:48,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:48,658 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-15 16:13:48,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:48,659 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:48,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:48,660 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:13:48,661 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 16:13:48,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:13:48,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 16:13:48,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-15 16:13:48,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 16:13:48,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-15 16:13:48,664 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-15 16:13:48,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:48,664 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-15 16:13:48,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:48,665 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-15 16:13:48,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:48,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:48,665 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:48,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-15 16:13:48,872 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:48,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:48,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-10-15 16:13:48,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:48,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613113407] [2020-10-15 16:13:48,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:48,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613113407] [2020-10-15 16:13:48,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380536921] [2020-10-15 16:13:48,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:48,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:48,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:48,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:48,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:49,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:49,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:49,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399585281] [2020-10-15 16:13:49,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:49,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:49,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:49,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:49,156 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-15 16:13:49,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:49,379 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 16:13:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:49,380 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:49,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:49,381 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:13:49,381 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 16:13:49,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:13:49,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 16:13:49,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-15 16:13:49,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 16:13:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 16:13:49,385 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 16:13:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:49,385 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 16:13:49,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 16:13:49,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:49,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:49,386 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:49,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:49,587 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:49,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:49,587 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-10-15 16:13:49,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:49,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725956936] [2020-10-15 16:13:49,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:49,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725956936] [2020-10-15 16:13:49,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822594794] [2020-10-15 16:13:49,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:49,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:49,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:49,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:49,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:49,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:49,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:49,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:49,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765732583] [2020-10-15 16:13:49,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:49,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:49,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:49,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:49,878 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 16:13:50,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:50,212 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-15 16:13:50,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:13:50,212 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:50,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:50,214 INFO L225 Difference]: With dead ends: 176 [2020-10-15 16:13:50,214 INFO L226 Difference]: Without dead ends: 171 [2020-10-15 16:13:50,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:13:50,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-15 16:13:50,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-15 16:13:50,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 16:13:50,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 16:13:50,218 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 16:13:50,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:50,218 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 16:13:50,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:50,218 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 16:13:50,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:50,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:50,219 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:50,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-15 16:13:50,429 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:50,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:50,430 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-10-15 16:13:50,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:50,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99993296] [2020-10-15 16:13:50,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:50,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99993296] [2020-10-15 16:13:50,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201977221] [2020-10-15 16:13:50,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:50,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:50,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:50,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:50,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:50,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:50,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:50,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:50,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276347024] [2020-10-15 16:13:50,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:50,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:50,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:50,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:50,668 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 16:13:50,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:50,905 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-15 16:13:50,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:50,906 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:50,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:50,908 INFO L225 Difference]: With dead ends: 166 [2020-10-15 16:13:50,908 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 16:13:50,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:13:50,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 16:13:50,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-15 16:13:50,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:13:50,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-15 16:13:50,912 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-15 16:13:50,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:50,912 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-15 16:13:50,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:50,912 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-15 16:13:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:50,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:50,913 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:51,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:51,123 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:51,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:51,124 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-10-15 16:13:51,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:51,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282284069] [2020-10-15 16:13:51,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:51,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282284069] [2020-10-15 16:13:51,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637983868] [2020-10-15 16:13:51,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:51,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:51,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:51,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:51,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:51,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:51,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:51,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852035540] [2020-10-15 16:13:51,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:51,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:51,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:51,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:51,318 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-15 16:13:51,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:51,484 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-15 16:13:51,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:51,485 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:51,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:51,486 INFO L225 Difference]: With dead ends: 163 [2020-10-15 16:13:51,486 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 16:13:51,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:13:51,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 16:13:51,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-15 16:13:51,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-15 16:13:51,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-15 16:13:51,490 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-15 16:13:51,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:51,490 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-15 16:13:51,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:51,490 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-15 16:13:51,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:51,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:51,491 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:51,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-15 16:13:51,692 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:51,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:51,693 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-10-15 16:13:51,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:51,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579876281] [2020-10-15 16:13:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:51,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579876281] [2020-10-15 16:13:51,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458078958] [2020-10-15 16:13:51,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:51,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:51,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:51,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:51,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:51,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:51,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:51,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:51,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005978967] [2020-10-15 16:13:51,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:51,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:51,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:51,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:51,878 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-15 16:13:52,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:52,119 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-15 16:13:52,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:13:52,120 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:52,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:52,121 INFO L225 Difference]: With dead ends: 170 [2020-10-15 16:13:52,121 INFO L226 Difference]: Without dead ends: 168 [2020-10-15 16:13:52,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:13:52,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-15 16:13:52,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-15 16:13:52,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-15 16:13:52,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-15 16:13:52,125 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-15 16:13:52,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:52,126 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-15 16:13:52,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:52,126 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-15 16:13:52,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:52,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:52,127 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:52,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:52,336 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:52,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:52,337 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-10-15 16:13:52,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:52,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896862646] [2020-10-15 16:13:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:52,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896862646] [2020-10-15 16:13:52,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515619150] [2020-10-15 16:13:52,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:52,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:52,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:52,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:52,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:52,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:52,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:52,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262442186] [2020-10-15 16:13:52,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:52,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:52,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:52,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:52,525 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-15 16:13:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:52,819 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-15 16:13:52,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:13:52,820 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:52,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:52,821 INFO L225 Difference]: With dead ends: 177 [2020-10-15 16:13:52,821 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 16:13:52,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:13:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 16:13:52,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-15 16:13:52,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-15 16:13:52,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-15 16:13:52,825 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-15 16:13:52,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:52,825 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-15 16:13:52,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:52,825 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-15 16:13:52,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:52,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:52,826 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:53,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-15 16:13:53,035 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:53,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:53,036 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-10-15 16:13:53,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:53,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547214228] [2020-10-15 16:13:53,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:53,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547214228] [2020-10-15 16:13:53,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572330082] [2020-10-15 16:13:53,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:53,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:53,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:53,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:53,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:53,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:53,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:53,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:53,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825378760] [2020-10-15 16:13:53,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:53,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:53,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:53,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:53,227 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-15 16:13:53,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:53,585 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-15 16:13:53,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:13:53,585 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:53,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:53,587 INFO L225 Difference]: With dead ends: 190 [2020-10-15 16:13:53,587 INFO L226 Difference]: Without dead ends: 182 [2020-10-15 16:13:53,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:13:53,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-15 16:13:53,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-15 16:13:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:13:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-15 16:13:53,591 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-15 16:13:53,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:53,592 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-15 16:13:53,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:53,592 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-15 16:13:53,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:53,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:53,592 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:53,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-15 16:13:53,798 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:53,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:53,798 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-10-15 16:13:53,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:53,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409385778] [2020-10-15 16:13:53,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:53,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409385778] [2020-10-15 16:13:53,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433573259] [2020-10-15 16:13:53,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:53,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:13:53,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:53,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:53,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:53,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:53,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:53,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:53,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462322964] [2020-10-15 16:13:53,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:53,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:53,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:53,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:53,990 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-10-15 16:13:54,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:54,332 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-10-15 16:13:54,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:13:54,333 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:54,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:54,334 INFO L225 Difference]: With dead ends: 180 [2020-10-15 16:13:54,335 INFO L226 Difference]: Without dead ends: 175 [2020-10-15 16:13:54,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:13:54,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-15 16:13:54,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-10-15 16:13:54,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-15 16:13:54,338 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-15 16:13:54,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:54,338 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-15 16:13:54,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:54,338 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-15 16:13:54,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:54,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:54,339 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:54,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-15 16:13:54,539 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:54,540 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-10-15 16:13:54,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:54,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885996852] [2020-10-15 16:13:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:54,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885996852] [2020-10-15 16:13:54,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800939507] [2020-10-15 16:13:54,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:54,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:54,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:54,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:54,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:54,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:54,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:54,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499036460] [2020-10-15 16:13:54,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:54,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:54,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:54,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:54,720 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-15 16:13:54,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:54,848 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-15 16:13:54,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:54,849 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:54,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:54,850 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:13:54,850 INFO L226 Difference]: Without dead ends: 162 [2020-10-15 16:13:54,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:13:54,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-15 16:13:54,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-15 16:13:54,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:13:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-15 16:13:54,853 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-15 16:13:54,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:54,854 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-15 16:13:54,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:54,854 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-15 16:13:54,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:54,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:54,854 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:55,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-15 16:13:55,056 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:55,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:55,056 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-10-15 16:13:55,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:55,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533414164] [2020-10-15 16:13:55,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:55,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533414164] [2020-10-15 16:13:55,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993492909] [2020-10-15 16:13:55,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:55,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:55,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:55,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:55,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:55,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:55,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:55,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:55,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20223353] [2020-10-15 16:13:55,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:55,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:55,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:55,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:55,256 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-15 16:13:55,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:55,400 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-15 16:13:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:13:55,401 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:55,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:55,402 INFO L225 Difference]: With dead ends: 161 [2020-10-15 16:13:55,402 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 16:13:55,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:13:55,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 16:13:55,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-15 16:13:55,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:13:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-15 16:13:55,406 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-15 16:13:55,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:55,407 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-15 16:13:55,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:55,407 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-15 16:13:55,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:55,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:55,407 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:55,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-15 16:13:55,616 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:55,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:55,616 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-10-15 16:13:55,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:55,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055172260] [2020-10-15 16:13:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:55,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055172260] [2020-10-15 16:13:55,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104133740] [2020-10-15 16:13:55,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:55,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:13:55,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:55,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:55,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:55,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:55,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:55,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544502049] [2020-10-15 16:13:55,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:55,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:55,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:55,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:55,819 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-15 16:13:56,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:56,004 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-15 16:13:56,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:13:56,004 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:56,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:56,006 INFO L225 Difference]: With dead ends: 165 [2020-10-15 16:13:56,006 INFO L226 Difference]: Without dead ends: 163 [2020-10-15 16:13:56,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:13:56,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-15 16:13:56,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-15 16:13:56,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:13:56,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-15 16:13:56,010 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-15 16:13:56,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:56,011 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-15 16:13:56,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:56,011 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-15 16:13:56,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:56,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:56,012 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:56,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-15 16:13:56,223 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:56,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:56,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-10-15 16:13:56,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:56,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102090223] [2020-10-15 16:13:56,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:56,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102090223] [2020-10-15 16:13:56,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546287712] [2020-10-15 16:13:56,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:56,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:56,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:56,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:56,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:56,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036141459] [2020-10-15 16:13:56,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:56,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:56,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:56,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:56,416 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-15 16:13:56,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:56,624 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-15 16:13:56,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:13:56,624 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:56,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:56,626 INFO L225 Difference]: With dead ends: 167 [2020-10-15 16:13:56,626 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 16:13:56,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:13:56,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 16:13:56,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-15 16:13:56,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:13:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-15 16:13:56,629 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-15 16:13:56,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:56,630 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-15 16:13:56,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:56,630 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-15 16:13:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:56,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:56,630 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:56,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:56,831 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:56,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:56,832 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-10-15 16:13:56,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:56,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336115647] [2020-10-15 16:13:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:56,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336115647] [2020-10-15 16:13:56,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902855844] [2020-10-15 16:13:56,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:56,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:56,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:56,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:56,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:57,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:57,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:57,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597311687] [2020-10-15 16:13:57,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:57,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:57,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:57,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:57,025 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-15 16:13:57,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:57,281 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-15 16:13:57,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:13:57,282 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:57,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:57,283 INFO L225 Difference]: With dead ends: 168 [2020-10-15 16:13:57,283 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 16:13:57,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:13:57,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 16:13:57,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-15 16:13:57,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:57,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-15 16:13:57,287 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-15 16:13:57,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:57,287 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-15 16:13:57,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:57,287 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-15 16:13:57,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:57,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:57,288 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:57,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:57,490 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:57,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:57,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-10-15 16:13:57,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:57,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707250853] [2020-10-15 16:13:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:57,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707250853] [2020-10-15 16:13:57,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247448933] [2020-10-15 16:13:57,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:57,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:13:57,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:57,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:57,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:57,645 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:57,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:57,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:57,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663270397] [2020-10-15 16:13:57,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:57,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:57,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:57,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:57,656 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-15 16:13:57,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:57,832 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-15 16:13:57,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:13:57,833 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:57,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:57,834 INFO L225 Difference]: With dead ends: 160 [2020-10-15 16:13:57,834 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 16:13:57,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:13:57,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 16:13:57,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-15 16:13:57,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 16:13:57,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-15 16:13:57,838 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-15 16:13:57,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:57,838 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-15 16:13:57,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:57,838 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-15 16:13:57,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:57,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:57,839 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:58,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:58,050 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:58,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:58,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-10-15 16:13:58,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:58,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610738039] [2020-10-15 16:13:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:58,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610738039] [2020-10-15 16:13:58,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649525497] [2020-10-15 16:13:58,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:58,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:13:58,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:58,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:58,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:58,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:13:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:58,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:58,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:58,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586427240] [2020-10-15 16:13:58,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:58,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:58,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:58,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:58,253 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-15 16:13:58,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:58,586 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-15 16:13:58,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:13:58,587 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:58,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:58,588 INFO L225 Difference]: With dead ends: 189 [2020-10-15 16:13:58,589 INFO L226 Difference]: Without dead ends: 181 [2020-10-15 16:13:58,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:13:58,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-15 16:13:58,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-15 16:13:58,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 16:13:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-15 16:13:58,593 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-15 16:13:58,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:58,593 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-15 16:13:58,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:58,593 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-15 16:13:58,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:58,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:58,594 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:58,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:58,804 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:58,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:58,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-10-15 16:13:58,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:58,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162888388] [2020-10-15 16:13:58,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:58,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162888388] [2020-10-15 16:13:58,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769875912] [2020-10-15 16:13:58,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:58,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:13:58,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:58,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:58,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:58,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:58,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:58,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946429423] [2020-10-15 16:13:58,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:58,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:58,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:58,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:58,985 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-15 16:13:59,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:59,219 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-15 16:13:59,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:13:59,220 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:59,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:59,221 INFO L225 Difference]: With dead ends: 169 [2020-10-15 16:13:59,221 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 16:13:59,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:13:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 16:13:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-15 16:13:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 16:13:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-15 16:13:59,225 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-15 16:13:59,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:59,225 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-15 16:13:59,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-15 16:13:59,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:59,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:59,226 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:13:59,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-15 16:13:59,438 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:13:59,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:13:59,438 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-10-15 16:13:59,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:13:59,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926283396] [2020-10-15 16:13:59,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:13:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:13:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:59,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926283396] [2020-10-15 16:13:59,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977394115] [2020-10-15 16:13:59,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:13:59,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:13:59,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:13:59,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:13:59,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:13:59,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:13:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:13:59,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:13:59,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:13:59,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884543383] [2020-10-15 16:13:59,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:13:59,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:13:59,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:13:59,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:13:59,628 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-15 16:13:59,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:13:59,966 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-15 16:13:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:13:59,966 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:13:59,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:13:59,968 INFO L225 Difference]: With dead ends: 192 [2020-10-15 16:13:59,968 INFO L226 Difference]: Without dead ends: 184 [2020-10-15 16:13:59,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:13:59,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-15 16:13:59,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-15 16:13:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 16:13:59,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-15 16:13:59,971 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-15 16:13:59,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:13:59,972 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-15 16:13:59,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:13:59,972 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-15 16:13:59,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:13:59,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:13:59,972 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:00,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:00,173 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:00,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:00,174 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-10-15 16:14:00,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:00,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186582110] [2020-10-15 16:14:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:00,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:00,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186582110] [2020-10-15 16:14:00,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148398657] [2020-10-15 16:14:00,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:00,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 16:14:00,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:00,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:00,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:00,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 16:14:00,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874285283] [2020-10-15 16:14:00,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 16:14:00,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:00,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 16:14:00,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 16:14:00,341 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-15 16:14:00,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:00,674 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-15 16:14:00,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:14:00,674 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 16:14:00,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:00,676 INFO L225 Difference]: With dead ends: 180 [2020-10-15 16:14:00,676 INFO L226 Difference]: Without dead ends: 175 [2020-10-15 16:14:00,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:14:00,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-15 16:14:00,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-15 16:14:00,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 16:14:00,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-15 16:14:00,679 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-15 16:14:00,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:00,680 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-15 16:14:00,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 16:14:00,680 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-15 16:14:00,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:00,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:00,681 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:00,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-15 16:14:00,881 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:00,882 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-10-15 16:14:00,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:00,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236370168] [2020-10-15 16:14:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:00,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236370168] [2020-10-15 16:14:00,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558932803] [2020-10-15 16:14:00,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:00,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:00,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:00,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:00,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:01,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:01,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:01,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 16:14:01,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127851638] [2020-10-15 16:14:01,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:14:01,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:01,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:14:01,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:14:01,119 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-15 16:14:01,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:01,261 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-15 16:14:01,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:01,262 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-15 16:14:01,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:01,263 INFO L225 Difference]: With dead ends: 164 [2020-10-15 16:14:01,263 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 16:14:01,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:14:01,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 16:14:01,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-15 16:14:01,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 16:14:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-15 16:14:01,267 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-15 16:14:01,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:01,267 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-15 16:14:01,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:14:01,267 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-15 16:14:01,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:01,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:01,268 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:01,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:01,469 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:01,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:01,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-10-15 16:14:01,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:01,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909531426] [2020-10-15 16:14:01,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:01,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909531426] [2020-10-15 16:14:01,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697848937] [2020-10-15 16:14:01,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:01,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:14:01,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:01,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:01,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:01,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:01,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:01,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:01,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269197986] [2020-10-15 16:14:01,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:01,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:01,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:01,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:01,740 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-15 16:14:01,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:01,786 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 16:14:01,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:14:01,787 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:01,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:01,788 INFO L225 Difference]: With dead ends: 156 [2020-10-15 16:14:01,788 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 16:14:01,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:01,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 16:14:01,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-15 16:14:01,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 16:14:01,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-15 16:14:01,794 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-15 16:14:01,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:01,794 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-15 16:14:01,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:01,794 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-15 16:14:01,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:01,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:01,795 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:02,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-15 16:14:02,006 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:02,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:02,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-10-15 16:14:02,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:02,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446527922] [2020-10-15 16:14:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:02,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446527922] [2020-10-15 16:14:02,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468487543] [2020-10-15 16:14:02,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:02,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:02,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:02,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:02,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:02,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:02,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:02,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405932491] [2020-10-15 16:14:02,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:02,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:02,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:02,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:02,272 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-15 16:14:02,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:02,363 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-15 16:14:02,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:14:02,363 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:02,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:02,364 INFO L225 Difference]: With dead ends: 170 [2020-10-15 16:14:02,364 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 16:14:02,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:14:02,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 16:14:02,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-15 16:14:02,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 16:14:02,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-15 16:14:02,368 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-15 16:14:02,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:02,368 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-15 16:14:02,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:02,368 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-15 16:14:02,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:02,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:02,369 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:02,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:02,577 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:02,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:02,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-10-15 16:14:02,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:02,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360937658] [2020-10-15 16:14:02,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:02,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360937658] [2020-10-15 16:14:02,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817403794] [2020-10-15 16:14:02,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:02,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:02,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:02,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:02,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:02,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:02,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:02,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846651851] [2020-10-15 16:14:02,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:02,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:02,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:02,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:02,825 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-15 16:14:02,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:02,911 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-15 16:14:02,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:14:02,912 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:02,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:02,913 INFO L225 Difference]: With dead ends: 169 [2020-10-15 16:14:02,913 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 16:14:02,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:14:02,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 16:14:02,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-15 16:14:02,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-15 16:14:02,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-15 16:14:02,917 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-15 16:14:02,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:02,917 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-15 16:14:02,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:02,917 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-15 16:14:02,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:02,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:02,918 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:03,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:03,119 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:03,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:03,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-10-15 16:14:03,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:03,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748945478] [2020-10-15 16:14:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:03,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:03,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748945478] [2020-10-15 16:14:03,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37329871] [2020-10-15 16:14:03,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:03,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:14:03,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:03,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:03,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:03,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:03,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:03,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653387658] [2020-10-15 16:14:03,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:03,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:03,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:03,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:03,343 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-15 16:14:03,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:03,448 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-15 16:14:03,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:14:03,449 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:03,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:03,450 INFO L225 Difference]: With dead ends: 168 [2020-10-15 16:14:03,450 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 16:14:03,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:14:03,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 16:14:03,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-15 16:14:03,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-15 16:14:03,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-15 16:14:03,454 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-15 16:14:03,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:03,454 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-15 16:14:03,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:03,454 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-15 16:14:03,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:03,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:03,455 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:03,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-15 16:14:03,656 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:03,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:03,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-10-15 16:14:03,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:03,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131164747] [2020-10-15 16:14:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:03,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131164747] [2020-10-15 16:14:03,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152647890] [2020-10-15 16:14:03,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:03,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:03,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:03,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:03,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:03,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698645830] [2020-10-15 16:14:03,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:03,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:03,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:03,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:03,871 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-15 16:14:04,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:04,004 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-15 16:14:04,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:04,004 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:04,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:04,006 INFO L225 Difference]: With dead ends: 167 [2020-10-15 16:14:04,006 INFO L226 Difference]: Without dead ends: 164 [2020-10-15 16:14:04,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:14:04,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-15 16:14:04,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-15 16:14:04,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-15 16:14:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-15 16:14:04,009 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-15 16:14:04,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:04,009 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-15 16:14:04,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:04,009 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-15 16:14:04,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 16:14:04,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:04,010 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:04,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:04,211 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:04,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:04,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-10-15 16:14:04,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:04,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654809442] [2020-10-15 16:14:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:04,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654809442] [2020-10-15 16:14:04,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48682784] [2020-10-15 16:14:04,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:04,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:04,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:04,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:04,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:04,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:04,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:04,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:04,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2154875] [2020-10-15 16:14:04,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:04,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:04,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:04,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:04,438 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-15 16:14:04,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:04,639 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-15 16:14:04,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:04,640 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 16:14:04,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:04,642 INFO L225 Difference]: With dead ends: 176 [2020-10-15 16:14:04,642 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 16:14:04,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:04,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 16:14:04,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-15 16:14:04,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-15 16:14:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-15 16:14:04,647 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-15 16:14:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:04,648 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-15 16:14:04,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-15 16:14:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:04,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:04,649 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:04,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:04,861 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:04,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:04,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-10-15 16:14:04,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:04,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081319426] [2020-10-15 16:14:04,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:04,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:04,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081319426] [2020-10-15 16:14:04,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310014498] [2020-10-15 16:14:04,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:05,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:05,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:05,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:05,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:05,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:05,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:05,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732903789] [2020-10-15 16:14:05,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:05,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:05,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:05,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:05,211 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-15 16:14:05,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:05,275 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-15 16:14:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:14:05,276 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:05,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:05,277 INFO L225 Difference]: With dead ends: 163 [2020-10-15 16:14:05,277 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 16:14:05,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:05,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 16:14:05,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-15 16:14:05,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-15 16:14:05,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-15 16:14:05,283 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-15 16:14:05,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:05,283 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-15 16:14:05,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:05,284 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-15 16:14:05,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:05,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:05,285 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:05,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-15 16:14:05,496 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:05,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:05,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-10-15 16:14:05,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:05,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083557614] [2020-10-15 16:14:05,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:05,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083557614] [2020-10-15 16:14:05,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672998553] [2020-10-15 16:14:05,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:05,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:05,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:05,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:05,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:05,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:05,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:05,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076082737] [2020-10-15 16:14:05,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:05,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:05,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:05,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:05,744 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-15 16:14:05,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:05,896 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-15 16:14:05,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:14:05,897 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:05,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:05,898 INFO L225 Difference]: With dead ends: 172 [2020-10-15 16:14:05,898 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 16:14:05,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:14:05,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 16:14:05,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-15 16:14:05,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 16:14:05,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-15 16:14:05,901 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-15 16:14:05,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:05,902 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-15 16:14:05,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:05,902 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-15 16:14:05,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:05,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:05,903 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:06,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:06,111 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:06,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:06,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-10-15 16:14:06,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:06,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61675096] [2020-10-15 16:14:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:06,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61675096] [2020-10-15 16:14:06,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581925511] [2020-10-15 16:14:06,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:06,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:06,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:06,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:06,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:06,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:06,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:06,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745224691] [2020-10-15 16:14:06,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:06,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:06,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:06,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:06,429 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-15 16:14:06,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:06,606 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-15 16:14:06,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:14:06,606 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:06,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:06,607 INFO L225 Difference]: With dead ends: 179 [2020-10-15 16:14:06,607 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 16:14:06,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:14:06,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 16:14:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-15 16:14:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-15 16:14:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-15 16:14:06,610 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-15 16:14:06,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:06,610 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-15 16:14:06,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-15 16:14:06,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:06,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:06,611 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:06,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-15 16:14:06,812 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:06,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:06,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-10-15 16:14:06,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:06,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47017424] [2020-10-15 16:14:06,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:06,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47017424] [2020-10-15 16:14:06,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414900958] [2020-10-15 16:14:06,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:06,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:06,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:06,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:06,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:07,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:07,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:07,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478743706] [2020-10-15 16:14:07,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:07,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:07,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:07,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:07,049 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-15 16:14:07,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:07,237 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-15 16:14:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:14:07,238 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:07,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:07,240 INFO L225 Difference]: With dead ends: 179 [2020-10-15 16:14:07,240 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 16:14:07,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:07,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 16:14:07,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-15 16:14:07,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 16:14:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-15 16:14:07,242 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-15 16:14:07,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:07,243 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-15 16:14:07,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:07,243 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-15 16:14:07,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:07,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:07,243 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:07,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-15 16:14:07,444 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:07,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:07,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-10-15 16:14:07,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:07,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497301299] [2020-10-15 16:14:07,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:07,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497301299] [2020-10-15 16:14:07,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276965196] [2020-10-15 16:14:07,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:07,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:07,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:07,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:07,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:07,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:07,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:07,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149886535] [2020-10-15 16:14:07,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:07,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:07,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:07,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:07,660 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-15 16:14:07,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:07,846 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-15 16:14:07,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:07,847 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:07,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:07,848 INFO L225 Difference]: With dead ends: 184 [2020-10-15 16:14:07,848 INFO L226 Difference]: Without dead ends: 182 [2020-10-15 16:14:07,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:07,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-15 16:14:07,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-15 16:14:07,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 16:14:07,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-15 16:14:07,852 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-15 16:14:07,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:07,853 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-15 16:14:07,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:07,853 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-15 16:14:07,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:07,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:07,853 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:08,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-15 16:14:08,057 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:08,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:08,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-10-15 16:14:08,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:08,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255973518] [2020-10-15 16:14:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:08,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255973518] [2020-10-15 16:14:08,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65690847] [2020-10-15 16:14:08,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:08,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:08,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:08,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:08,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:08,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767788766] [2020-10-15 16:14:08,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:08,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:08,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:08,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:08,303 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-15 16:14:08,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:08,499 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-15 16:14:08,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:08,499 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:08,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:08,501 INFO L225 Difference]: With dead ends: 179 [2020-10-15 16:14:08,501 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 16:14:08,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:08,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 16:14:08,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-15 16:14:08,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-15 16:14:08,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-15 16:14:08,505 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-15 16:14:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:08,505 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-15 16:14:08,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:08,505 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-15 16:14:08,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:08,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:08,506 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:08,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:08,716 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:08,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:08,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-10-15 16:14:08,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:08,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072726144] [2020-10-15 16:14:08,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:08,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072726144] [2020-10-15 16:14:08,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245629653] [2020-10-15 16:14:08,806 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:08,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:08,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:08,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:08,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:08,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:08,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:08,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897512653] [2020-10-15 16:14:08,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:08,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:08,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:08,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:08,966 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-15 16:14:09,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:09,118 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-15 16:14:09,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:14:09,118 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:09,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:09,120 INFO L225 Difference]: With dead ends: 176 [2020-10-15 16:14:09,120 INFO L226 Difference]: Without dead ends: 174 [2020-10-15 16:14:09,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:14:09,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-15 16:14:09,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-15 16:14:09,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:14:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-15 16:14:09,124 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-15 16:14:09,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:09,124 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-15 16:14:09,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:09,125 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-15 16:14:09,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:09,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:09,125 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:09,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:09,336 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:09,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:09,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-10-15 16:14:09,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:09,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047836130] [2020-10-15 16:14:09,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:09,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047836130] [2020-10-15 16:14:09,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48951745] [2020-10-15 16:14:09,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:09,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:14:09,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:09,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:09,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:09,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:09,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:09,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613568980] [2020-10-15 16:14:09,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:09,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:09,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:09,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:09,583 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-15 16:14:09,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:09,838 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-15 16:14:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:09,839 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:09,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:09,841 INFO L225 Difference]: With dead ends: 185 [2020-10-15 16:14:09,841 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 16:14:09,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 16:14:09,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-15 16:14:09,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:14:09,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-15 16:14:09,845 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-15 16:14:09,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:09,845 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-15 16:14:09,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:09,845 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-15 16:14:09,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:09,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:09,846 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:10,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:10,047 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:10,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:10,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-10-15 16:14:10,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:10,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671640410] [2020-10-15 16:14:10,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:10,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671640410] [2020-10-15 16:14:10,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204542062] [2020-10-15 16:14:10,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:10,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:10,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:10,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:10,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:10,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:10,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:10,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183783100] [2020-10-15 16:14:10,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:10,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:10,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:10,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:10,313 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-15 16:14:10,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:10,500 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-15 16:14:10,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:10,501 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:10,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:10,503 INFO L225 Difference]: With dead ends: 185 [2020-10-15 16:14:10,503 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 16:14:10,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:10,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 16:14:10,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-15 16:14:10,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-15 16:14:10,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-15 16:14:10,506 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-15 16:14:10,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:10,506 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-15 16:14:10,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:10,507 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-15 16:14:10,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:10,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:10,507 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:10,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:10,708 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:10,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:10,709 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-10-15 16:14:10,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:10,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875416987] [2020-10-15 16:14:10,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:10,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875416987] [2020-10-15 16:14:10,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46007629] [2020-10-15 16:14:10,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:10,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:10,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:10,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:10,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:11,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:11,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:11,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085803393] [2020-10-15 16:14:11,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:11,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:11,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:11,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:11,022 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-15 16:14:11,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:11,087 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-15 16:14:11,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:14:11,087 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:11,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:11,089 INFO L225 Difference]: With dead ends: 182 [2020-10-15 16:14:11,089 INFO L226 Difference]: Without dead ends: 180 [2020-10-15 16:14:11,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:14:11,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-15 16:14:11,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-15 16:14:11,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:14:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-15 16:14:11,093 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-15 16:14:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:11,093 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-15 16:14:11,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:11,093 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-15 16:14:11,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:11,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:11,095 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:11,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-15 16:14:11,305 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:11,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:11,305 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-10-15 16:14:11,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:11,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117678941] [2020-10-15 16:14:11,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:11,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117678941] [2020-10-15 16:14:11,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605648552] [2020-10-15 16:14:11,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:11,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:11,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:11,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:11,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:11,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:11,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:11,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308935032] [2020-10-15 16:14:11,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:11,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:11,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:11,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:11,574 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-15 16:14:11,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:11,752 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-15 16:14:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:14:11,753 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:11,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:11,755 INFO L225 Difference]: With dead ends: 185 [2020-10-15 16:14:11,755 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 16:14:11,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:14:11,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 16:14:11,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-15 16:14:11,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:11,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-15 16:14:11,758 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-15 16:14:11,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:11,759 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-15 16:14:11,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:11,759 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-15 16:14:11,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:11,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:11,760 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:11,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:11,960 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:11,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:11,961 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-10-15 16:14:11,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:11,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981331352] [2020-10-15 16:14:11,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:12,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981331352] [2020-10-15 16:14:12,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182043381] [2020-10-15 16:14:12,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:12,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:12,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:12,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:12,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:12,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293553015] [2020-10-15 16:14:12,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:12,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:12,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:12,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:12,234 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:12,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:12,453 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-15 16:14:12,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:14:12,454 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:12,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:12,455 INFO L225 Difference]: With dead ends: 191 [2020-10-15 16:14:12,455 INFO L226 Difference]: Without dead ends: 189 [2020-10-15 16:14:12,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:12,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-15 16:14:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-15 16:14:12,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:14:12,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-15 16:14:12,459 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-15 16:14:12,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:12,459 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-15 16:14:12,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-15 16:14:12,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:12,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:12,460 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:12,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:12,661 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:12,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:12,661 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-10-15 16:14:12,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:12,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999387617] [2020-10-15 16:14:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:12,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999387617] [2020-10-15 16:14:12,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987111305] [2020-10-15 16:14:12,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:12,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:12,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:12,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:12,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:12,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:12,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:12,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413597698] [2020-10-15 16:14:12,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:12,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:12,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:12,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:12,900 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-15 16:14:13,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:13,141 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-15 16:14:13,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:13,142 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:13,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:13,144 INFO L225 Difference]: With dead ends: 187 [2020-10-15 16:14:13,144 INFO L226 Difference]: Without dead ends: 185 [2020-10-15 16:14:13,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:13,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-15 16:14:13,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-15 16:14:13,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:13,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-15 16:14:13,148 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-15 16:14:13,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:13,149 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-15 16:14:13,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:13,149 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-15 16:14:13,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:13,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:13,149 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:13,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-15 16:14:13,353 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:13,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:13,353 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-10-15 16:14:13,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:13,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080860242] [2020-10-15 16:14:13,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:13,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080860242] [2020-10-15 16:14:13,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363448566] [2020-10-15 16:14:13,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:13,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:13,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:13,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:13,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:13,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:13,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:13,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443039441] [2020-10-15 16:14:13,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:13,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:13,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:13,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:13,580 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:13,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:13,822 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-15 16:14:13,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:13,823 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:13,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:13,825 INFO L225 Difference]: With dead ends: 198 [2020-10-15 16:14:13,825 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 16:14:13,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 16:14:13,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-15 16:14:13,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:13,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-15 16:14:13,828 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-15 16:14:13,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:13,828 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-15 16:14:13,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:13,829 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-15 16:14:13,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:13,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:13,829 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:14,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:14,030 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:14,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:14,030 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-10-15 16:14:14,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:14,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068901695] [2020-10-15 16:14:14,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:14,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068901695] [2020-10-15 16:14:14,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353890722] [2020-10-15 16:14:14,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:14,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:14,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:14,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:14,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:14,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:14,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:14,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016890771] [2020-10-15 16:14:14,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:14,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:14,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:14,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:14,270 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-15 16:14:14,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:14,523 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-15 16:14:14,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:14,524 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:14,526 INFO L225 Difference]: With dead ends: 189 [2020-10-15 16:14:14,526 INFO L226 Difference]: Without dead ends: 187 [2020-10-15 16:14:14,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:14,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-15 16:14:14,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-15 16:14:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:14:14,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-15 16:14:14,529 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-15 16:14:14,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:14,529 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-15 16:14:14,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:14,529 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-15 16:14:14,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:14,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:14,530 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:14,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-15 16:14:14,731 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:14,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:14,731 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-10-15 16:14:14,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:14,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840476571] [2020-10-15 16:14:14,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:14,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840476571] [2020-10-15 16:14:14,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239849866] [2020-10-15 16:14:14,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:14,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:14,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:14,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:14,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:14,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:14,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:14,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596622640] [2020-10-15 16:14:14,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:14,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:14,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:14,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:14,982 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-15 16:14:15,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:15,063 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-15 16:14:15,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:14:15,063 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:15,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:15,065 INFO L225 Difference]: With dead ends: 178 [2020-10-15 16:14:15,065 INFO L226 Difference]: Without dead ends: 176 [2020-10-15 16:14:15,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:14:15,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-15 16:14:15,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-15 16:14:15,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:15,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-15 16:14:15,069 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-15 16:14:15,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:15,069 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-15 16:14:15,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:15,069 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-15 16:14:15,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:15,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:15,069 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:15,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:15,273 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:15,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:15,274 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-10-15 16:14:15,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:15,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194722447] [2020-10-15 16:14:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:15,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194722447] [2020-10-15 16:14:15,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710275048] [2020-10-15 16:14:15,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:15,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:15,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:15,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:15,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:15,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:15,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:15,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047604704] [2020-10-15 16:14:15,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:15,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:15,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:15,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:15,523 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-15 16:14:15,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:15,711 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-15 16:14:15,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:15,712 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:15,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:15,713 INFO L225 Difference]: With dead ends: 193 [2020-10-15 16:14:15,714 INFO L226 Difference]: Without dead ends: 191 [2020-10-15 16:14:15,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:14:15,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-15 16:14:15,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-15 16:14:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-15 16:14:15,716 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-15 16:14:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:15,716 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-15 16:14:15,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:15,717 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-15 16:14:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:15,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:15,717 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:15,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-15 16:14:15,918 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:15,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:15,918 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-10-15 16:14:15,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:15,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790045335] [2020-10-15 16:14:15,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:15,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790045335] [2020-10-15 16:14:15,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143737703] [2020-10-15 16:14:15,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:16,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:16,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:16,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:16,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:16,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:16,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026933151] [2020-10-15 16:14:16,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:16,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:16,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:16,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:16,177 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-15 16:14:16,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:16,415 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-15 16:14:16,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:16,415 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:16,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:16,417 INFO L225 Difference]: With dead ends: 195 [2020-10-15 16:14:16,417 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 16:14:16,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:14:16,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 16:14:16,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-15 16:14:16,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:14:16,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-15 16:14:16,420 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-15 16:14:16,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:16,421 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-15 16:14:16,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:16,421 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-15 16:14:16,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:16,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:16,421 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:16,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:16,622 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:16,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:16,623 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-10-15 16:14:16,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:16,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600828885] [2020-10-15 16:14:16,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:16,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600828885] [2020-10-15 16:14:16,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320238594] [2020-10-15 16:14:16,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:16,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:16,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:16,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:16,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:16,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:16,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:16,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593614952] [2020-10-15 16:14:16,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:16,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:16,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:16,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:16,849 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-15 16:14:16,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:16,965 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-15 16:14:16,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:14:16,966 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:16,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:16,968 INFO L225 Difference]: With dead ends: 174 [2020-10-15 16:14:16,968 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 16:14:16,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:14:16,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 16:14:16,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-15 16:14:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:16,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-15 16:14:16,972 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-15 16:14:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:16,972 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-15 16:14:16,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:16,972 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-15 16:14:16,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:16,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:16,972 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:17,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-15 16:14:17,173 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:17,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:17,174 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-10-15 16:14:17,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:17,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946211140] [2020-10-15 16:14:17,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:17,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946211140] [2020-10-15 16:14:17,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932410910] [2020-10-15 16:14:17,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:17,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:17,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:17,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:17,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:17,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:17,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:17,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808474449] [2020-10-15 16:14:17,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:17,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:17,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:17,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:17,403 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-15 16:14:17,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:17,620 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-15 16:14:17,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:17,621 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:17,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:17,622 INFO L225 Difference]: With dead ends: 189 [2020-10-15 16:14:17,622 INFO L226 Difference]: Without dead ends: 187 [2020-10-15 16:14:17,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:14:17,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-15 16:14:17,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-15 16:14:17,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-15 16:14:17,626 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-15 16:14:17,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:17,626 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-15 16:14:17,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:17,626 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-15 16:14:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:17,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:17,626 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:17,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:17,827 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:17,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:17,828 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-10-15 16:14:17,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:17,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241228859] [2020-10-15 16:14:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:17,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241228859] [2020-10-15 16:14:17,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635859331] [2020-10-15 16:14:17,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:17,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:17,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:17,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:17,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:18,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:18,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:18,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395780187] [2020-10-15 16:14:18,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:18,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:18,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:18,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:18,061 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-15 16:14:18,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:18,197 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-15 16:14:18,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:14:18,198 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:18,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:18,200 INFO L225 Difference]: With dead ends: 175 [2020-10-15 16:14:18,200 INFO L226 Difference]: Without dead ends: 173 [2020-10-15 16:14:18,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:14:18,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-15 16:14:18,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-15 16:14:18,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 16:14:18,204 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 16:14:18,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:18,204 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 16:14:18,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:18,204 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 16:14:18,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:18,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:18,205 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:18,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:18,416 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:18,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:18,416 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-10-15 16:14:18,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:18,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100792331] [2020-10-15 16:14:18,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:18,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100792331] [2020-10-15 16:14:18,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076660407] [2020-10-15 16:14:18,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:18,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:18,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:18,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:18,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:18,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:18,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:18,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:18,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628464250] [2020-10-15 16:14:18,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:18,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:18,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:18,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:18,675 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:19,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:19,023 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-15 16:14:19,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:19,024 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:19,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:19,025 INFO L225 Difference]: With dead ends: 195 [2020-10-15 16:14:19,025 INFO L226 Difference]: Without dead ends: 190 [2020-10-15 16:14:19,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:14:19,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-15 16:14:19,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-15 16:14:19,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:19,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-15 16:14:19,029 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-15 16:14:19,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:19,030 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-15 16:14:19,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:19,030 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-15 16:14:19,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:19,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:19,030 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:19,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:19,241 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:19,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:19,242 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-10-15 16:14:19,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:19,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429150525] [2020-10-15 16:14:19,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:19,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:19,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429150525] [2020-10-15 16:14:19,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213738788] [2020-10-15 16:14:19,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:19,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:19,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:19,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:19,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:19,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:19,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:19,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560742028] [2020-10-15 16:14:19,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:19,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:19,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:19,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:19,466 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-15 16:14:19,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:19,711 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-15 16:14:19,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:14:19,712 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:19,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:19,714 INFO L225 Difference]: With dead ends: 187 [2020-10-15 16:14:19,714 INFO L226 Difference]: Without dead ends: 185 [2020-10-15 16:14:19,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:19,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-15 16:14:19,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-15 16:14:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 16:14:19,718 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 16:14:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:19,718 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 16:14:19,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 16:14:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:19,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:19,719 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:19,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:19,924 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:19,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:19,925 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-10-15 16:14:19,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:19,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192911794] [2020-10-15 16:14:19,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:19,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192911794] [2020-10-15 16:14:19,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130763791] [2020-10-15 16:14:19,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:20,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:20,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:20,142 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:20,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:20,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:20,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88103171] [2020-10-15 16:14:20,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:20,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:20,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:20,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:20,170 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:20,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:20,592 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-15 16:14:20,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:14:20,592 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:20,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:20,594 INFO L225 Difference]: With dead ends: 212 [2020-10-15 16:14:20,594 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 16:14:20,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:14:20,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 16:14:20,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-15 16:14:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 16:14:20,597 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 16:14:20,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:20,597 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 16:14:20,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:20,597 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 16:14:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:20,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:20,598 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:20,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-15 16:14:20,800 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:20,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:20,800 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-10-15 16:14:20,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:20,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208490901] [2020-10-15 16:14:20,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:20,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208490901] [2020-10-15 16:14:20,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916028616] [2020-10-15 16:14:20,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:20,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:20,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:20,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:20,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:21,011 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:21,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:21,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:21,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229246993] [2020-10-15 16:14:21,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:21,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:21,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:21,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:21,036 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:21,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:21,356 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-15 16:14:21,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:21,356 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:21,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:21,358 INFO L225 Difference]: With dead ends: 202 [2020-10-15 16:14:21,358 INFO L226 Difference]: Without dead ends: 197 [2020-10-15 16:14:21,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:14:21,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-15 16:14:21,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-15 16:14:21,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:21,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-15 16:14:21,362 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-15 16:14:21,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:21,362 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-15 16:14:21,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:21,362 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-15 16:14:21,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:21,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:21,363 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:21,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:21,564 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:21,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:21,564 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-10-15 16:14:21,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:21,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904203865] [2020-10-15 16:14:21,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:21,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904203865] [2020-10-15 16:14:21,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44303026] [2020-10-15 16:14:21,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:21,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:21,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:21,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:21,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:22,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:22,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:22,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469267946] [2020-10-15 16:14:22,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:22,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:22,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:22,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:22,320 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-15 16:14:22,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:22,613 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-15 16:14:22,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:22,614 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:22,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:22,615 INFO L225 Difference]: With dead ends: 198 [2020-10-15 16:14:22,615 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 16:14:22,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:22,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 16:14:22,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-15 16:14:22,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:22,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-15 16:14:22,619 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-15 16:14:22,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:22,620 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-15 16:14:22,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-15 16:14:22,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:22,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:22,620 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:22,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-15 16:14:22,823 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:22,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:22,823 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-10-15 16:14:22,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:22,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45798493] [2020-10-15 16:14:22,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:22,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45798493] [2020-10-15 16:14:22,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561202457] [2020-10-15 16:14:22,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:22,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:22,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:22,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:22,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:23,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:23,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:23,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411214167] [2020-10-15 16:14:23,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:23,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:23,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:23,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:23,086 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-15 16:14:23,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:23,479 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-15 16:14:23,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:14:23,480 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:23,481 INFO L225 Difference]: With dead ends: 209 [2020-10-15 16:14:23,481 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 16:14:23,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:14:23,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 16:14:23,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-15 16:14:23,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:23,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 16:14:23,485 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 16:14:23,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:23,485 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 16:14:23,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:23,485 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 16:14:23,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:23,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:23,486 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:23,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-15 16:14:23,687 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:23,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:23,687 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-10-15 16:14:23,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:23,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177428653] [2020-10-15 16:14:23,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:23,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177428653] [2020-10-15 16:14:23,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058910479] [2020-10-15 16:14:23,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:23,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:23,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:23,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:23,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:23,909 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:23,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:23,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:23,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552455041] [2020-10-15 16:14:23,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:23,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:23,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:23,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:23,946 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 16:14:24,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:24,467 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-15 16:14:24,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:14:24,467 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:24,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:24,468 INFO L225 Difference]: With dead ends: 217 [2020-10-15 16:14:24,468 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 16:14:24,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:14:24,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 16:14:24,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-15 16:14:24,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 16:14:24,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-15 16:14:24,472 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-15 16:14:24,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:24,472 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-15 16:14:24,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:24,473 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-15 16:14:24,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:24,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:24,473 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:24,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-15 16:14:24,681 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:24,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:24,681 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-10-15 16:14:24,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:24,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506806770] [2020-10-15 16:14:24,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:24,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506806770] [2020-10-15 16:14:24,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659712059] [2020-10-15 16:14:24,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:24,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:24,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:24,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:24,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:26,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:26,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:26,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:26,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878512251] [2020-10-15 16:14:26,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:26,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:26,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:26,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-15 16:14:26,998 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-15 16:14:31,292 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 16:14:35,513 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 16:14:35,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:35,986 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-15 16:14:35,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:14:35,987 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:35,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:35,988 INFO L225 Difference]: With dead ends: 236 [2020-10-15 16:14:35,988 INFO L226 Difference]: Without dead ends: 228 [2020-10-15 16:14:35,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-15 16:14:35,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-15 16:14:35,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-15 16:14:35,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:14:35,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-15 16:14:35,992 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-15 16:14:35,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:35,992 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-15 16:14:35,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:35,992 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-15 16:14:35,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:35,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:35,992 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:36,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-15 16:14:36,193 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:36,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:36,194 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-10-15 16:14:36,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:36,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57547658] [2020-10-15 16:14:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:36,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57547658] [2020-10-15 16:14:36,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361785600] [2020-10-15 16:14:36,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:36,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:36,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:36,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:36,441 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:36,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:36,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:36,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:36,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347510786] [2020-10-15 16:14:36,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:36,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:36,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:36,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:36,469 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-10-15 16:14:37,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:37,022 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-10-15 16:14:37,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:14:37,023 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:37,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:37,024 INFO L225 Difference]: With dead ends: 219 [2020-10-15 16:14:37,024 INFO L226 Difference]: Without dead ends: 214 [2020-10-15 16:14:37,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:14:37,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-15 16:14:37,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-10-15 16:14:37,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:14:37,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-15 16:14:37,027 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-15 16:14:37,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:37,027 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-15 16:14:37,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:37,027 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-15 16:14:37,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:37,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:37,028 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:37,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:37,230 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:37,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:37,230 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-10-15 16:14:37,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:37,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342603757] [2020-10-15 16:14:37,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:37,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342603757] [2020-10-15 16:14:37,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482155554] [2020-10-15 16:14:37,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:37,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:37,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:37,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:37,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:37,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:37,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:37,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501688122] [2020-10-15 16:14:37,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:37,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:37,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:37,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:37,473 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-15 16:14:37,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:37,743 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-15 16:14:37,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:37,743 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:37,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:37,744 INFO L225 Difference]: With dead ends: 197 [2020-10-15 16:14:37,744 INFO L226 Difference]: Without dead ends: 195 [2020-10-15 16:14:37,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:37,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-15 16:14:37,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-15 16:14:37,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-15 16:14:37,747 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-15 16:14:37,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:37,748 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-15 16:14:37,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:37,748 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-15 16:14:37,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:37,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:37,749 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:37,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:37,952 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:37,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:37,952 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-10-15 16:14:37,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:37,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180695716] [2020-10-15 16:14:37,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:38,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180695716] [2020-10-15 16:14:38,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217292297] [2020-10-15 16:14:38,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:38,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:38,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:38,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:38,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:38,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:38,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:38,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985610891] [2020-10-15 16:14:38,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:38,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:38,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:38,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:38,192 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-15 16:14:38,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:38,466 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-15 16:14:38,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:38,466 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:38,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:38,467 INFO L225 Difference]: With dead ends: 202 [2020-10-15 16:14:38,467 INFO L226 Difference]: Without dead ends: 200 [2020-10-15 16:14:38,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:38,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-15 16:14:38,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-15 16:14:38,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:38,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-15 16:14:38,470 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-15 16:14:38,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:38,470 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-15 16:14:38,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:38,470 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-15 16:14:38,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:38,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:38,471 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:38,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-15 16:14:38,673 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:38,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:38,673 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-10-15 16:14:38,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:38,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88466774] [2020-10-15 16:14:38,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:38,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88466774] [2020-10-15 16:14:38,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90236448] [2020-10-15 16:14:38,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:38,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:38,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:38,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:38,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:38,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:38,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:38,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845981258] [2020-10-15 16:14:38,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:38,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:38,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:38,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:38,933 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-15 16:14:39,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:39,213 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-15 16:14:39,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:14:39,214 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:39,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:39,215 INFO L225 Difference]: With dead ends: 197 [2020-10-15 16:14:39,215 INFO L226 Difference]: Without dead ends: 195 [2020-10-15 16:14:39,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:39,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-15 16:14:39,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-15 16:14:39,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:39,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-15 16:14:39,218 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-15 16:14:39,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:39,219 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-15 16:14:39,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:39,219 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-15 16:14:39,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:39,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:39,219 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:39,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-15 16:14:39,420 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:39,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:39,420 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-10-15 16:14:39,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:39,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140615726] [2020-10-15 16:14:39,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:39,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140615726] [2020-10-15 16:14:39,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409608961] [2020-10-15 16:14:39,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:39,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:39,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:39,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:39,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:39,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:39,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:39,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690635010] [2020-10-15 16:14:39,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:39,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:39,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:39,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:39,727 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-15 16:14:40,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:40,339 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-15 16:14:40,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:14:40,340 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:40,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:40,342 INFO L225 Difference]: With dead ends: 214 [2020-10-15 16:14:40,342 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 16:14:40,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:14:40,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 16:14:40,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-15 16:14:40,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:14:40,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-15 16:14:40,346 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-15 16:14:40,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:40,347 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-15 16:14:40,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:40,347 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-15 16:14:40,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:40,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:40,348 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:40,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-15 16:14:40,557 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:40,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:40,558 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-10-15 16:14:40,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:40,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762762162] [2020-10-15 16:14:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:40,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762762162] [2020-10-15 16:14:40,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750873734] [2020-10-15 16:14:40,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:40,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:40,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:40,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:40,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:40,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:40,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:40,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826751998] [2020-10-15 16:14:40,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:40,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:40,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:40,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:40,905 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-15 16:14:41,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:41,289 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-15 16:14:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:14:41,290 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:41,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:41,290 INFO L225 Difference]: With dead ends: 217 [2020-10-15 16:14:41,290 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 16:14:41,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:14:41,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 16:14:41,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-15 16:14:41,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:41,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-15 16:14:41,295 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-15 16:14:41,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:41,295 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-15 16:14:41,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:41,295 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-15 16:14:41,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:41,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:41,296 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:41,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:41,506 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:41,506 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-10-15 16:14:41,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:41,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301740911] [2020-10-15 16:14:41,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:41,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301740911] [2020-10-15 16:14:41,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730008826] [2020-10-15 16:14:41,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:41,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:41,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:41,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:41,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:41,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406520169] [2020-10-15 16:14:41,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:41,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:41,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:41,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:41,752 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-15 16:14:42,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:42,169 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-15 16:14:42,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:14:42,170 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:42,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:42,170 INFO L225 Difference]: With dead ends: 211 [2020-10-15 16:14:42,170 INFO L226 Difference]: Without dead ends: 209 [2020-10-15 16:14:42,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:14:42,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-15 16:14:42,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-15 16:14:42,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 16:14:42,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 16:14:42,174 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 16:14:42,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:42,174 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 16:14:42,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:42,175 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 16:14:42,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:42,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:42,175 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:42,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:42,376 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:42,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:42,376 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-10-15 16:14:42,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:42,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671055083] [2020-10-15 16:14:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:42,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671055083] [2020-10-15 16:14:42,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315073299] [2020-10-15 16:14:42,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:42,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:42,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:42,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:42,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:42,602 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:42,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:42,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:42,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211989760] [2020-10-15 16:14:42,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:42,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:42,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:42,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:42,614 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 16:14:43,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:43,096 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-15 16:14:43,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:14:43,096 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:43,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:43,097 INFO L225 Difference]: With dead ends: 211 [2020-10-15 16:14:43,097 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 16:14:43,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:14:43,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 16:14:43,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-15 16:14:43,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 16:14:43,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 16:14:43,100 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 16:14:43,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:43,101 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 16:14:43,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:43,101 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 16:14:43,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:43,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:43,101 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:43,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-15 16:14:43,302 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:43,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:43,303 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-10-15 16:14:43,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:43,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808389852] [2020-10-15 16:14:43,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:43,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:43,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808389852] [2020-10-15 16:14:43,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992127847] [2020-10-15 16:14:43,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:43,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:14:43,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:43,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:43,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:43,536 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:43,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:43,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:43,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187097466] [2020-10-15 16:14:43,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:43,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:43,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:43,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:43,571 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 16:14:44,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:44,187 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-15 16:14:44,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:14:44,188 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:44,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:44,189 INFO L225 Difference]: With dead ends: 227 [2020-10-15 16:14:44,189 INFO L226 Difference]: Without dead ends: 222 [2020-10-15 16:14:44,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:14:44,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-15 16:14:44,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-15 16:14:44,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 16:14:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-15 16:14:44,193 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-15 16:14:44,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:44,193 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-15 16:14:44,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:44,193 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-15 16:14:44,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:44,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:44,193 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:44,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-15 16:14:44,396 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:44,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:44,396 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-10-15 16:14:44,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:44,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652337231] [2020-10-15 16:14:44,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:44,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652337231] [2020-10-15 16:14:44,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150424280] [2020-10-15 16:14:44,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:44,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:14:44,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:44,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:44,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:44,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:44,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:44,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993761288] [2020-10-15 16:14:44,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:44,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:44,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:44,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:44,633 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-15 16:14:45,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:45,104 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-15 16:14:45,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:14:45,104 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:45,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:45,105 INFO L225 Difference]: With dead ends: 221 [2020-10-15 16:14:45,105 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 16:14:45,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:14:45,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 16:14:45,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-15 16:14:45,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 16:14:45,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 16:14:45,109 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 16:14:45,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:45,109 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 16:14:45,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:45,109 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 16:14:45,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:45,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:45,110 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:45,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:45,311 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:45,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:45,311 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-10-15 16:14:45,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:45,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650587686] [2020-10-15 16:14:45,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:45,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650587686] [2020-10-15 16:14:45,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440091423] [2020-10-15 16:14:45,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:45,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:14:45,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:45,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:45,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:45,530 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:14:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:45,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:45,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:45,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024858304] [2020-10-15 16:14:45,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:45,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:45,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:45,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:45,543 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 16:14:46,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:46,134 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-15 16:14:46,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:14:46,135 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:46,136 INFO L225 Difference]: With dead ends: 240 [2020-10-15 16:14:46,136 INFO L226 Difference]: Without dead ends: 232 [2020-10-15 16:14:46,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:14:46,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-15 16:14:46,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-15 16:14:46,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 16:14:46,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-15 16:14:46,140 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-15 16:14:46,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:46,140 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-15 16:14:46,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:46,140 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-15 16:14:46,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:46,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:46,140 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:46,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-15 16:14:46,341 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:46,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:46,342 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-10-15 16:14:46,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:46,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260867236] [2020-10-15 16:14:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:46,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260867236] [2020-10-15 16:14:46,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67015033] [2020-10-15 16:14:46,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:46,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:14:46,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:46,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:46,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:46,623 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:46,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:46,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:46,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057726128] [2020-10-15 16:14:46,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:46,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:46,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:46,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:46,644 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-15 16:14:47,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:47,508 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-15 16:14:47,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:14:47,510 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:47,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:47,511 INFO L225 Difference]: With dead ends: 238 [2020-10-15 16:14:47,511 INFO L226 Difference]: Without dead ends: 230 [2020-10-15 16:14:47,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:14:47,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-15 16:14:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-15 16:14:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-15 16:14:47,517 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-15 16:14:47,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:47,518 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-15 16:14:47,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-15 16:14:47,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:47,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:47,519 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:47,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:47,733 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:47,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:47,734 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-10-15 16:14:47,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:47,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336848383] [2020-10-15 16:14:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:47,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336848383] [2020-10-15 16:14:47,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161465777] [2020-10-15 16:14:47,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:47,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:47,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:48,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:48,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:48,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584299513] [2020-10-15 16:14:48,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:48,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:48,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:48,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:48,118 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-15 16:14:48,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:48,436 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-15 16:14:48,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:14:48,436 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:48,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:48,437 INFO L225 Difference]: With dead ends: 195 [2020-10-15 16:14:48,437 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 16:14:48,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:14:48,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 16:14:48,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-15 16:14:48,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:14:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-15 16:14:48,440 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-15 16:14:48,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:48,441 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-15 16:14:48,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-15 16:14:48,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:48,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:48,441 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:48,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-15 16:14:48,650 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:48,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:48,651 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-10-15 16:14:48,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:48,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274021128] [2020-10-15 16:14:48,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:48,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274021128] [2020-10-15 16:14:48,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124804847] [2020-10-15 16:14:48,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:48,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:14:48,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:48,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:48,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:48,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:48,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:14:48,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142009058] [2020-10-15 16:14:48,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:14:48,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:48,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:14:48,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:14:48,908 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-15 16:14:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:14:49,396 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-15 16:14:49,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:14:49,397 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:14:49,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:14:49,398 INFO L225 Difference]: With dead ends: 206 [2020-10-15 16:14:49,398 INFO L226 Difference]: Without dead ends: 204 [2020-10-15 16:14:49,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:14:49,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-15 16:14:49,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-15 16:14:49,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 16:14:49,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-15 16:14:49,401 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-15 16:14:49,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:14:49,402 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-15 16:14:49,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:14:49,402 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-15 16:14:49,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:14:49,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:14:49,402 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:14:49,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:49,603 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:14:49,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:14:49,603 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-10-15 16:14:49,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:14:49,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89365291] [2020-10-15 16:14:49,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:14:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:14:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:49,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89365291] [2020-10-15 16:14:49,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205949260] [2020-10-15 16:14:49,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:14:49,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:14:49,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:14:49,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:14:49,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:14:49,846 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:14:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:14:51,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:14:51,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 16:14:51,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219098403] [2020-10-15 16:14:51,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:14:51,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:14:51,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:14:51,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-15 16:14:51,073 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-10-15 16:14:53,483 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-15 16:15:15,817 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-15 16:15:39,695 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-15 16:15:57,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:57,667 INFO L93 Difference]: Finished difference Result 242 states and 573 transitions. [2020-10-15 16:15:57,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:15:57,671 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-15 16:15:57,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:57,672 INFO L225 Difference]: With dead ends: 242 [2020-10-15 16:15:57,672 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 16:15:57,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-10-15 16:15:57,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 16:15:57,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 139. [2020-10-15 16:15:57,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:15:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-15 16:15:57,676 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-15 16:15:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:57,677 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-15 16:15:57,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:15:57,677 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-15 16:15:57,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:57,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:57,677 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:57,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-15 16:15:57,888 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:57,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:57,888 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-10-15 16:15:57,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:57,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294032404] [2020-10-15 16:15:57,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:57,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:57,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294032404] [2020-10-15 16:15:57,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559818611] [2020-10-15 16:15:57,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:58,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:15:58,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:58,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:58,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:58,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:58,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:58,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532825759] [2020-10-15 16:15:58,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:58,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:58,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:58,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:58,143 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-15 16:15:58,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:58,379 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-15 16:15:58,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:15:58,380 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:58,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:58,380 INFO L225 Difference]: With dead ends: 194 [2020-10-15 16:15:58,380 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 16:15:58,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:15:58,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 16:15:58,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-15 16:15:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:15:58,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-15 16:15:58,383 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-15 16:15:58,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:58,384 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-15 16:15:58,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:58,384 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-15 16:15:58,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:58,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:58,384 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:58,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:58,585 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:58,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:58,585 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-10-15 16:15:58,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:58,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450540367] [2020-10-15 16:15:58,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:58,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450540367] [2020-10-15 16:15:58,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869173206] [2020-10-15 16:15:58,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:58,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:15:58,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:58,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:58,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:58,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:58,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:58,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033674436] [2020-10-15 16:15:58,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:58,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:58,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:58,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:58,864 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-15 16:15:59,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:59,186 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-15 16:15:59,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:15:59,187 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:59,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:59,188 INFO L225 Difference]: With dead ends: 205 [2020-10-15 16:15:59,188 INFO L226 Difference]: Without dead ends: 203 [2020-10-15 16:15:59,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:15:59,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-15 16:15:59,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-15 16:15:59,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:15:59,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-15 16:15:59,192 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-15 16:15:59,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:59,192 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-15 16:15:59,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:59,193 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-15 16:15:59,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:59,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:59,193 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:15:59,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:59,397 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:15:59,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:15:59,397 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-10-15 16:15:59,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:15:59,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760579135] [2020-10-15 16:15:59,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:15:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:15:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:59,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760579135] [2020-10-15 16:15:59,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227176646] [2020-10-15 16:15:59,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:15:59,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:15:59,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:15:59,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:15:59,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:15:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:15:59,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:15:59,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:15:59,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013321421] [2020-10-15 16:15:59,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:15:59,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:15:59,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:15:59,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:15:59,660 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-15 16:15:59,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:15:59,944 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-15 16:15:59,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:15:59,944 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:15:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:15:59,945 INFO L225 Difference]: With dead ends: 201 [2020-10-15 16:15:59,945 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 16:15:59,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:15:59,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 16:15:59,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-15 16:15:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 16:15:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-15 16:15:59,949 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-15 16:15:59,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:15:59,949 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-15 16:15:59,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:15:59,949 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-15 16:15:59,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:15:59,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:15:59,950 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:00,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:00,151 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:00,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:00,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-10-15 16:16:00,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:00,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390877486] [2020-10-15 16:16:00,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:00,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:00,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390877486] [2020-10-15 16:16:00,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619615698] [2020-10-15 16:16:00,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:00,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:00,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:00,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:00,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:00,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972190100] [2020-10-15 16:16:00,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:00,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:00,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:00,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:00,456 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-15 16:16:00,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:00,764 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-15 16:16:00,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:16:00,765 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:00,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:00,766 INFO L225 Difference]: With dead ends: 194 [2020-10-15 16:16:00,766 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 16:16:00,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:16:00,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 16:16:00,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-15 16:16:00,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:16:00,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-15 16:16:00,769 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-15 16:16:00,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:00,770 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-15 16:16:00,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:00,770 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-15 16:16:00,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:00,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:00,770 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:00,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-15 16:16:00,971 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:00,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:00,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-10-15 16:16:00,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:00,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128693064] [2020-10-15 16:16:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:01,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128693064] [2020-10-15 16:16:01,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559448849] [2020-10-15 16:16:01,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:01,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:16:01,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:01,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:01,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:01,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:01,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:01,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123079519] [2020-10-15 16:16:01,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:01,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:01,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:01,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:01,249 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-15 16:16:01,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:01,631 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-15 16:16:01,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:16:01,631 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:01,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:01,632 INFO L225 Difference]: With dead ends: 209 [2020-10-15 16:16:01,632 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 16:16:01,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:16:01,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 16:16:01,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-15 16:16:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 16:16:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-15 16:16:01,635 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-15 16:16:01,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:01,636 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-15 16:16:01,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-15 16:16:01,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:01,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:01,636 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:01,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:01,837 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:01,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:01,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-10-15 16:16:01,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:01,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826334489] [2020-10-15 16:16:01,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:01,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:01,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826334489] [2020-10-15 16:16:01,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235026443] [2020-10-15 16:16:01,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:01,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:16:01,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:01,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:01,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:02,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:02,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:02,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893547115] [2020-10-15 16:16:02,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:02,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:02,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:02,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:02,097 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-15 16:16:02,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:02,437 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-15 16:16:02,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:16:02,438 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:02,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:02,439 INFO L225 Difference]: With dead ends: 202 [2020-10-15 16:16:02,439 INFO L226 Difference]: Without dead ends: 200 [2020-10-15 16:16:02,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:16:02,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-15 16:16:02,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-15 16:16:02,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:16:02,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-15 16:16:02,442 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-15 16:16:02,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:02,442 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-15 16:16:02,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:02,442 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-15 16:16:02,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:02,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:02,443 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:02,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-15 16:16:02,644 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:02,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:02,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-10-15 16:16:02,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:02,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882257819] [2020-10-15 16:16:02,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:02,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882257819] [2020-10-15 16:16:02,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715562498] [2020-10-15 16:16:02,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:02,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:16:02,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:02,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:02,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:02,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:02,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:02,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814178093] [2020-10-15 16:16:02,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:02,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:02,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:02,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:02,898 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-15 16:16:03,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:03,220 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-15 16:16:03,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:16:03,221 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:03,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:03,222 INFO L225 Difference]: With dead ends: 201 [2020-10-15 16:16:03,222 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 16:16:03,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:16:03,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 16:16:03,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-15 16:16:03,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 16:16:03,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-15 16:16:03,225 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-15 16:16:03,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:03,226 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-15 16:16:03,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:03,226 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-15 16:16:03,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:03,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:03,226 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:03,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-15 16:16:03,427 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:03,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:03,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-10-15 16:16:03,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:03,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594954923] [2020-10-15 16:16:03,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:03,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:03,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594954923] [2020-10-15 16:16:03,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854298024] [2020-10-15 16:16:03,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:03,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:16:03,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:03,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:03,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:03,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:03,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:03,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182913299] [2020-10-15 16:16:03,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:03,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:03,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:03,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:03,684 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-15 16:16:04,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:04,140 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-15 16:16:04,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:16:04,141 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:04,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:04,141 INFO L225 Difference]: With dead ends: 215 [2020-10-15 16:16:04,141 INFO L226 Difference]: Without dead ends: 213 [2020-10-15 16:16:04,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:16:04,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-15 16:16:04,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-15 16:16:04,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:16:04,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-15 16:16:04,145 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-15 16:16:04,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:04,146 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-15 16:16:04,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:04,146 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-15 16:16:04,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:04,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:04,146 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:04,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:04,354 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:04,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:04,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-10-15 16:16:04,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:04,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141752230] [2020-10-15 16:16:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:04,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141752230] [2020-10-15 16:16:04,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467022824] [2020-10-15 16:16:04,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:04,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:16:04,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:04,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:04,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:04,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:04,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:04,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090646030] [2020-10-15 16:16:04,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:04,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:04,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:04,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:04,610 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-15 16:16:05,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:05,004 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-15 16:16:05,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:16:05,005 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:05,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:05,007 INFO L225 Difference]: With dead ends: 196 [2020-10-15 16:16:05,007 INFO L226 Difference]: Without dead ends: 194 [2020-10-15 16:16:05,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:16:05,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-15 16:16:05,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-15 16:16:05,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:16:05,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 16:16:05,010 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 16:16:05,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:05,011 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 16:16:05,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:05,011 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 16:16:05,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:05,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:05,012 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:05,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:05,214 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:05,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:05,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-10-15 16:16:05,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:05,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927044535] [2020-10-15 16:16:05,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:05,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927044535] [2020-10-15 16:16:05,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498272957] [2020-10-15 16:16:05,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:05,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:05,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:05,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:16:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:05,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:05,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:05,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469081974] [2020-10-15 16:16:05,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:05,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:05,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:05,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:05,449 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 16:16:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:05,779 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-15 16:16:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:16:05,780 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:05,781 INFO L225 Difference]: With dead ends: 191 [2020-10-15 16:16:05,781 INFO L226 Difference]: Without dead ends: 186 [2020-10-15 16:16:05,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:16:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-15 16:16:05,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-15 16:16:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:16:05,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 16:16:05,786 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 16:16:05,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:05,786 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 16:16:05,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:05,786 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 16:16:05,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:05,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:05,787 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:05,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-15 16:16:05,990 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:05,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:05,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-10-15 16:16:05,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:05,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007312703] [2020-10-15 16:16:05,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:06,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007312703] [2020-10-15 16:16:06,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869313065] [2020-10-15 16:16:06,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:06,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:16:06,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:06,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:06,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:06,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:16:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:06,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:06,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:06,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427448778] [2020-10-15 16:16:06,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:06,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:06,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:06,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:06,262 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 16:16:06,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:06,832 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-15 16:16:06,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:16:06,833 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:06,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:06,833 INFO L225 Difference]: With dead ends: 232 [2020-10-15 16:16:06,833 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:16:06,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:16:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:16:06,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-15 16:16:06,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 16:16:06,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-15 16:16:06,837 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-15 16:16:06,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:06,838 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-15 16:16:06,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:06,838 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-15 16:16:06,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:06,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:06,838 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:07,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:07,048 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:07,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:07,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-10-15 16:16:07,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:07,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728871050] [2020-10-15 16:16:07,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:07,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728871050] [2020-10-15 16:16:07,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323795540] [2020-10-15 16:16:07,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:07,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:16:07,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:07,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:07,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:07,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:07,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:07,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805354238] [2020-10-15 16:16:07,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:07,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:07,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:07,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:07,306 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-15 16:16:07,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:07,858 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-10-15 16:16:07,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:16:07,858 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:07,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:07,859 INFO L225 Difference]: With dead ends: 222 [2020-10-15 16:16:07,859 INFO L226 Difference]: Without dead ends: 220 [2020-10-15 16:16:07,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:16:07,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-15 16:16:07,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-10-15 16:16:07,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 16:16:07,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 16:16:07,862 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 16:16:07,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:07,862 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 16:16:07,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:07,862 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 16:16:07,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:07,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:07,863 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:08,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:08,063 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:08,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:08,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-10-15 16:16:08,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:08,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876837378] [2020-10-15 16:16:08,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:08,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876837378] [2020-10-15 16:16:08,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453330323] [2020-10-15 16:16:08,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:08,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:16:08,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:08,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:08,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:08,310 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:16:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:08,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:08,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:08,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320932206] [2020-10-15 16:16:08,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:08,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:08,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:08,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:08,344 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 16:16:09,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:09,156 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-15 16:16:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:16:09,157 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:09,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:09,158 INFO L225 Difference]: With dead ends: 254 [2020-10-15 16:16:09,158 INFO L226 Difference]: Without dead ends: 246 [2020-10-15 16:16:09,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:16:09,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-15 16:16:09,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-15 16:16:09,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 16:16:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-15 16:16:09,162 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-15 16:16:09,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:09,163 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-15 16:16:09,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:09,163 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-15 16:16:09,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:09,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:09,164 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:09,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:09,372 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:09,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:09,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-10-15 16:16:09,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:09,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493850464] [2020-10-15 16:16:09,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:09,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493850464] [2020-10-15 16:16:09,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436781264] [2020-10-15 16:16:09,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:09,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:16:09,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:09,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:09,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:09,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:16:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:09,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:09,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:09,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779620361] [2020-10-15 16:16:09,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:09,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:09,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:09,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:09,650 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-15 16:16:10,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:10,451 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-15 16:16:10,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:16:10,452 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:10,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:10,453 INFO L225 Difference]: With dead ends: 246 [2020-10-15 16:16:10,453 INFO L226 Difference]: Without dead ends: 238 [2020-10-15 16:16:10,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:16:10,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-15 16:16:10,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-15 16:16:10,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:16:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-15 16:16:10,457 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-15 16:16:10,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:10,457 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-15 16:16:10,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:10,457 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-15 16:16:10,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:10,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:10,458 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:10,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-15 16:16:10,666 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:10,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:10,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-10-15 16:16:10,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:10,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679219708] [2020-10-15 16:16:10,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:10,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679219708] [2020-10-15 16:16:10,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720033223] [2020-10-15 16:16:10,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:10,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:16:10,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:10,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:10,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:10,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:10,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:10,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268182798] [2020-10-15 16:16:10,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:10,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:10,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:10,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:10,933 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-15 16:16:11,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:11,340 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-15 16:16:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:16:11,341 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:11,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:11,341 INFO L225 Difference]: With dead ends: 208 [2020-10-15 16:16:11,342 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 16:16:11,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:16:11,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 16:16:11,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-15 16:16:11,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 16:16:11,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-15 16:16:11,345 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-15 16:16:11,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:11,345 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-15 16:16:11,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:11,345 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-15 16:16:11,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:11,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:11,346 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:11,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-15 16:16:11,546 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:11,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:11,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-10-15 16:16:11,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:11,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66546920] [2020-10-15 16:16:11,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:11,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66546920] [2020-10-15 16:16:11,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713517211] [2020-10-15 16:16:11,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:11,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:11,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:11,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:11,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:11,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825290093] [2020-10-15 16:16:11,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:11,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:11,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:11,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:11,791 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-15 16:16:12,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:12,317 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-15 16:16:12,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:16:12,318 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:12,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:12,318 INFO L225 Difference]: With dead ends: 215 [2020-10-15 16:16:12,318 INFO L226 Difference]: Without dead ends: 213 [2020-10-15 16:16:12,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:16:12,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-15 16:16:12,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-15 16:16:12,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 16:16:12,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-15 16:16:12,322 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-15 16:16:12,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:12,322 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-15 16:16:12,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:12,322 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-15 16:16:12,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:12,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:12,322 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:12,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-15 16:16:12,523 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:12,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:12,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-10-15 16:16:12,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:12,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900593441] [2020-10-15 16:16:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:12,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900593441] [2020-10-15 16:16:12,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405180402] [2020-10-15 16:16:12,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:12,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:16:12,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:12,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:12,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:12,767 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:16:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:12,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:12,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:12,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38263689] [2020-10-15 16:16:12,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:12,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:12,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:12,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:12,780 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-15 16:16:13,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:13,370 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-15 16:16:13,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:16:13,371 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:13,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:13,371 INFO L225 Difference]: With dead ends: 236 [2020-10-15 16:16:13,371 INFO L226 Difference]: Without dead ends: 228 [2020-10-15 16:16:13,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:16:13,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-15 16:16:13,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-15 16:16:13,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 16:16:13,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-15 16:16:13,376 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-15 16:16:13,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:13,376 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-15 16:16:13,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:13,376 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-15 16:16:13,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:13,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:13,377 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:13,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-15 16:16:13,577 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:13,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:13,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-10-15 16:16:13,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:13,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382402141] [2020-10-15 16:16:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:13,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382402141] [2020-10-15 16:16:13,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561771883] [2020-10-15 16:16:13,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:13,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:16:13,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:13,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:13,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:13,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:16:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:13,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:13,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:13,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808760893] [2020-10-15 16:16:13,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:13,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:13,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:13,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:13,821 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-15 16:16:14,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:14,456 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-15 16:16:14,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:16:14,457 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:14,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:14,458 INFO L225 Difference]: With dead ends: 241 [2020-10-15 16:16:14,458 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:16:14,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:16:14,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:16:14,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-15 16:16:14,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-15 16:16:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-15 16:16:14,462 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-15 16:16:14,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:14,462 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-15 16:16:14,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:14,462 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-15 16:16:14,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:14,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:14,463 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:14,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-15 16:16:14,663 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:14,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:14,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-10-15 16:16:14,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:14,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358922] [2020-10-15 16:16:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:14,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:14,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358922] [2020-10-15 16:16:14,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664591685] [2020-10-15 16:16:14,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:14,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:16:14,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:14,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 16:16:14,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:14,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:16:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:14,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:14,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 16:16:14,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509127322] [2020-10-15 16:16:14,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 16:16:14,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:14,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 16:16:14,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 16:16:14,918 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-15 16:16:15,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:15,556 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-15 16:16:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:16:15,556 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 16:16:15,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:15,557 INFO L225 Difference]: With dead ends: 232 [2020-10-15 16:16:15,558 INFO L226 Difference]: Without dead ends: 224 [2020-10-15 16:16:15,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:16:15,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-15 16:16:15,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-15 16:16:15,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-15 16:16:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-15 16:16:15,562 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-15 16:16:15,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:15,562 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-15 16:16:15,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 16:16:15,563 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-15 16:16:15,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:15,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:15,563 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:15,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:15,772 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:15,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:15,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-10-15 16:16:15,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:15,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162089938] [2020-10-15 16:16:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:15,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162089938] [2020-10-15 16:16:15,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863170772] [2020-10-15 16:16:15,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:15,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:16:15,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:15,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:15,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:16,108 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:16:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:16,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:16,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 16:16:16,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697539030] [2020-10-15 16:16:16,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:16:16,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:16,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:16:16,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:16:16,154 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-10-15 16:16:16,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:16,432 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-10-15 16:16:16,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:16:16,433 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-10-15 16:16:16,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:16,434 INFO L225 Difference]: With dead ends: 185 [2020-10-15 16:16:16,434 INFO L226 Difference]: Without dead ends: 180 [2020-10-15 16:16:16,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:16:16,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-15 16:16:16,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-10-15 16:16:16,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 16:16:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-15 16:16:16,438 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-15 16:16:16,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:16,438 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-15 16:16:16,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:16:16,438 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-15 16:16:16,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:16,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:16,439 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:16,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-15 16:16:16,640 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:16,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:16,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-10-15 16:16:16,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:16,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613064605] [2020-10-15 16:16:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:16,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613064605] [2020-10-15 16:16:16,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538926207] [2020-10-15 16:16:16,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:16,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:16:16,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:16,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:16,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:17,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:17,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:17,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844390307] [2020-10-15 16:16:17,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:17,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:17,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:17,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:17,036 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-10-15 16:16:17,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:17,102 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-10-15 16:16:17,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:16:17,102 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:16:17,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:17,103 INFO L225 Difference]: With dead ends: 180 [2020-10-15 16:16:17,103 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 16:16:17,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:17,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 16:16:17,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-10-15 16:16:17,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 16:16:17,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-15 16:16:17,106 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-15 16:16:17,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:17,107 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-15 16:16:17,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:17,107 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-15 16:16:17,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:17,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:17,107 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:17,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-15 16:16:17,308 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:17,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:17,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1413108102, now seen corresponding path program 22 times [2020-10-15 16:16:17,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:17,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100838574] [2020-10-15 16:16:17,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:17,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100838574] [2020-10-15 16:16:17,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065272262] [2020-10-15 16:16:17,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:17,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:16:17,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:17,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:17,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:17,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:17,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:17,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109670895] [2020-10-15 16:16:17,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:17,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:17,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:17,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:17,681 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-15 16:16:17,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:17,764 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-10-15 16:16:17,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:16:17,764 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:16:17,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:17,765 INFO L225 Difference]: With dead ends: 197 [2020-10-15 16:16:17,765 INFO L226 Difference]: Without dead ends: 194 [2020-10-15 16:16:17,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:16:17,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-15 16:16:17,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-10-15 16:16:17,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 16:16:17,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-15 16:16:17,769 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-15 16:16:17,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:17,769 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-15 16:16:17,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:17,769 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-15 16:16:17,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:17,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:17,770 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:17,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:17,979 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:17,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:17,979 INFO L82 PathProgramCache]: Analyzing trace with hash 551260342, now seen corresponding path program 23 times [2020-10-15 16:16:17,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:17,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536946664] [2020-10-15 16:16:17,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:18,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536946664] [2020-10-15 16:16:18,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723156883] [2020-10-15 16:16:18,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:18,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:16:18,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:18,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:18,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:18,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:18,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:18,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036874498] [2020-10-15 16:16:18,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:18,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:18,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:18,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:18,357 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-15 16:16:18,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:18,512 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-10-15 16:16:18,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:16:18,514 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:16:18,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:18,515 INFO L225 Difference]: With dead ends: 196 [2020-10-15 16:16:18,515 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 16:16:18,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:16:18,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 16:16:18,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-10-15 16:16:18,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-15 16:16:18,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-10-15 16:16:18,520 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-10-15 16:16:18,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:18,521 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-10-15 16:16:18,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:18,521 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-10-15 16:16:18,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:18,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:18,522 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:18,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:18,733 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:18,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:18,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1216195462, now seen corresponding path program 24 times [2020-10-15 16:16:18,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:18,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781556969] [2020-10-15 16:16:18,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:18,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781556969] [2020-10-15 16:16:18,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348585795] [2020-10-15 16:16:18,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:18,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:16:18,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:18,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:18,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:19,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:19,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:19,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68756505] [2020-10-15 16:16:19,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:19,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:19,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:19,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:19,115 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-10-15 16:16:19,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:19,245 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-15 16:16:19,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:16:19,246 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:16:19,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:19,247 INFO L225 Difference]: With dead ends: 195 [2020-10-15 16:16:19,247 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 16:16:19,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:16:19,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 16:16:19,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-10-15 16:16:19,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-15 16:16:19,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-10-15 16:16:19,251 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-10-15 16:16:19,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:19,251 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-10-15 16:16:19,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:19,251 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-10-15 16:16:19,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:19,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:19,251 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:19,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:19,452 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:19,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:19,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1237644982, now seen corresponding path program 25 times [2020-10-15 16:16:19,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:19,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366803568] [2020-10-15 16:16:19,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:19,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366803568] [2020-10-15 16:16:19,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659045189] [2020-10-15 16:16:19,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:19,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:19,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:19,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:19,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:19,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592791477] [2020-10-15 16:16:19,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:19,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:19,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:19,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:19,778 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-10-15 16:16:19,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:19,945 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-10-15 16:16:19,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:16:19,946 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:16:19,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:19,946 INFO L225 Difference]: With dead ends: 194 [2020-10-15 16:16:19,947 INFO L226 Difference]: Without dead ends: 191 [2020-10-15 16:16:19,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:16:19,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-15 16:16:19,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-10-15 16:16:19,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-15 16:16:19,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-10-15 16:16:19,951 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-10-15 16:16:19,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:19,951 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-10-15 16:16:19,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:19,951 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-10-15 16:16:19,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:19,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:19,952 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:20,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:20,160 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:20,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:20,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1238336902, now seen corresponding path program 26 times [2020-10-15 16:16:20,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:20,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040760111] [2020-10-15 16:16:20,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:20,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040760111] [2020-10-15 16:16:20,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010354161] [2020-10-15 16:16:20,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:20,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:16:20,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:20,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:20,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:20,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:20,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:20,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755196851] [2020-10-15 16:16:20,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:20,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:20,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:20,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:20,484 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-10-15 16:16:20,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:20,699 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-10-15 16:16:20,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:16:20,700 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:16:20,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:20,701 INFO L225 Difference]: With dead ends: 193 [2020-10-15 16:16:20,701 INFO L226 Difference]: Without dead ends: 190 [2020-10-15 16:16:20,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:16:20,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-15 16:16:20,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-10-15 16:16:20,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-15 16:16:20,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-10-15 16:16:20,704 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-10-15 16:16:20,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:20,704 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-10-15 16:16:20,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:20,705 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-10-15 16:16:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 16:16:20,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:20,705 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:20,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-15 16:16:20,906 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:20,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:20,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1238359222, now seen corresponding path program 27 times [2020-10-15 16:16:20,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:20,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092426147] [2020-10-15 16:16:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:21,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092426147] [2020-10-15 16:16:21,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852864206] [2020-10-15 16:16:21,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:21,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:16:21,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:21,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:21,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:21,216 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:16:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:21,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:21,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:21,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359662834] [2020-10-15 16:16:21,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:21,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:21,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:21,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:21,231 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-10-15 16:16:21,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:21,482 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-15 16:16:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:16:21,483 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 16:16:21,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:21,487 INFO L225 Difference]: With dead ends: 202 [2020-10-15 16:16:21,487 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 16:16:21,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:16:21,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 16:16:21,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-10-15 16:16:21,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-15 16:16:21,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-10-15 16:16:21,491 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-10-15 16:16:21,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:21,491 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-10-15 16:16:21,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:21,492 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-10-15 16:16:21,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:21,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:21,492 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:21,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-15 16:16:21,702 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:21,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:21,703 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-10-15 16:16:21,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:21,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789990631] [2020-10-15 16:16:21,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:21,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789990631] [2020-10-15 16:16:21,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783742215] [2020-10-15 16:16:21,821 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:21,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:16:21,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:21,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:21,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:22,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:22,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:22,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676737028] [2020-10-15 16:16:22,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:22,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:22,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:22,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:22,049 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-10-15 16:16:22,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:22,108 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-10-15 16:16:22,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 16:16:22,109 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:22,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:22,110 INFO L225 Difference]: With dead ends: 188 [2020-10-15 16:16:22,110 INFO L226 Difference]: Without dead ends: 186 [2020-10-15 16:16:22,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:22,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-15 16:16:22,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-10-15 16:16:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 16:16:22,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-10-15 16:16:22,113 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-10-15 16:16:22,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:22,114 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-10-15 16:16:22,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:22,114 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-10-15 16:16:22,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:22,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:22,114 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:22,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-15 16:16:22,315 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:22,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:22,316 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-10-15 16:16:22,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:22,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605826185] [2020-10-15 16:16:22,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:22,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605826185] [2020-10-15 16:16:22,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279829047] [2020-10-15 16:16:22,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:22,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:16:22,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:22,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:22,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:22,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:22,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:22,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:22,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147983212] [2020-10-15 16:16:22,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:22,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:22,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:22,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:22,674 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-10-15 16:16:22,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:22,907 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-10-15 16:16:22,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:16:22,908 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:22,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:22,908 INFO L225 Difference]: With dead ends: 199 [2020-10-15 16:16:22,908 INFO L226 Difference]: Without dead ends: 197 [2020-10-15 16:16:22,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:16:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-15 16:16:22,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-10-15 16:16:22,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 16:16:22,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-15 16:16:22,912 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-15 16:16:22,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:22,912 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-15 16:16:22,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:22,912 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-15 16:16:22,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:22,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:22,913 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:23,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-15 16:16:23,114 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:23,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:23,114 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-10-15 16:16:23,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:23,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060543456] [2020-10-15 16:16:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:23,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060543456] [2020-10-15 16:16:23,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102295850] [2020-10-15 16:16:23,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:23,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:23,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:23,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:23,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:23,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721679662] [2020-10-15 16:16:23,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:23,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:23,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:23,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:23,509 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-15 16:16:23,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:23,812 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-15 16:16:23,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:16:23,813 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:23,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:23,813 INFO L225 Difference]: With dead ends: 210 [2020-10-15 16:16:23,813 INFO L226 Difference]: Without dead ends: 208 [2020-10-15 16:16:23,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:16:23,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-15 16:16:23,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-10-15 16:16:23,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-15 16:16:23,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-10-15 16:16:23,817 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-10-15 16:16:23,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:23,817 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-10-15 16:16:23,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:23,817 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-10-15 16:16:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:23,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:23,817 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:24,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-15 16:16:24,018 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:24,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:24,019 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-10-15 16:16:24,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:24,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517295782] [2020-10-15 16:16:24,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:24,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517295782] [2020-10-15 16:16:24,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380945355] [2020-10-15 16:16:24,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:24,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:16:24,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:24,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:24,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:26,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:26,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:26,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078552290] [2020-10-15 16:16:26,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:26,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:26,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:26,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:26,581 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-10-15 16:16:26,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:26,929 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-15 16:16:26,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:16:26,929 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:26,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:26,930 INFO L225 Difference]: With dead ends: 210 [2020-10-15 16:16:26,930 INFO L226 Difference]: Without dead ends: 208 [2020-10-15 16:16:26,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:16:26,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-15 16:16:26,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-10-15 16:16:26,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 16:16:26,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-15 16:16:26,934 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-15 16:16:26,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:26,934 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-15 16:16:26,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:26,935 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-15 16:16:26,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:26,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:26,935 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:27,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-15 16:16:27,139 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:27,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:27,139 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-10-15 16:16:27,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:27,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026517294] [2020-10-15 16:16:27,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:27,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026517294] [2020-10-15 16:16:27,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824670781] [2020-10-15 16:16:27,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:27,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 16:16:27,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:27,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:27,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:30,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:30,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:30,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662950066] [2020-10-15 16:16:30,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:30,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:30,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:30,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:16:30,261 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-15 16:16:34,494 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:16:34,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:34,746 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-15 16:16:34,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:16:34,746 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:34,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:34,747 INFO L225 Difference]: With dead ends: 218 [2020-10-15 16:16:34,747 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 16:16:34,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-15 16:16:34,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 16:16:34,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-15 16:16:34,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 16:16:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 16:16:34,750 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 16:16:34,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:34,750 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 16:16:34,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:34,750 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 16:16:34,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:34,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:34,751 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:34,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:34,952 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:34,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:34,952 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-10-15 16:16:34,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:34,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191910789] [2020-10-15 16:16:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:35,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191910789] [2020-10-15 16:16:35,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569334178] [2020-10-15 16:16:35,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:35,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:16:35,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:35,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:35,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:35,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:35,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:35,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506704190] [2020-10-15 16:16:35,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:35,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:35,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:35,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:35,356 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 16:16:35,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:35,724 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-10-15 16:16:35,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:16:35,725 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:35,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:35,726 INFO L225 Difference]: With dead ends: 212 [2020-10-15 16:16:35,726 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 16:16:35,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:16:35,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 16:16:35,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-10-15 16:16:35,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-15 16:16:35,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-10-15 16:16:35,730 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-10-15 16:16:35,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:35,730 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-10-15 16:16:35,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:35,730 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-10-15 16:16:35,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:35,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:35,730 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:35,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:35,931 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:35,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:35,932 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-10-15 16:16:35,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:35,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175543254] [2020-10-15 16:16:35,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:36,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175543254] [2020-10-15 16:16:36,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69700003] [2020-10-15 16:16:36,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:36,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:16:36,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:36,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:36,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:36,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:36,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:36,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680211222] [2020-10-15 16:16:36,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:36,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:36,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:36,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:36,263 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-10-15 16:16:36,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:36,624 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-15 16:16:36,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:16:36,625 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:36,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:36,626 INFO L225 Difference]: With dead ends: 212 [2020-10-15 16:16:36,626 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 16:16:36,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:16:36,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 16:16:36,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-10-15 16:16:36,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 16:16:36,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 16:16:36,629 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 16:16:36,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:36,629 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 16:16:36,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:36,629 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 16:16:36,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:36,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:36,630 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:36,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:36,830 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:36,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:36,831 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-10-15 16:16:36,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:36,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152608872] [2020-10-15 16:16:36,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:36,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152608872] [2020-10-15 16:16:36,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059442891] [2020-10-15 16:16:36,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:36,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:16:36,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:36,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:36,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:37,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:37,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:37,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137531133] [2020-10-15 16:16:37,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:37,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:37,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:37,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:37,172 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 16:16:37,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:37,551 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-10-15 16:16:37,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:16:37,551 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:37,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:37,552 INFO L225 Difference]: With dead ends: 224 [2020-10-15 16:16:37,552 INFO L226 Difference]: Without dead ends: 222 [2020-10-15 16:16:37,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:16:37,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-15 16:16:37,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-10-15 16:16:37,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 16:16:37,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 16:16:37,556 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 16:16:37,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:37,556 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 16:16:37,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:37,556 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 16:16:37,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:37,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:37,557 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:37,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:37,759 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:37,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:37,760 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-10-15 16:16:37,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:37,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064242148] [2020-10-15 16:16:37,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:37,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064242148] [2020-10-15 16:16:37,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271743855] [2020-10-15 16:16:37,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:37,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:37,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:38,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:38,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:38,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331924602] [2020-10-15 16:16:38,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:38,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:38,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:38,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:38,069 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 16:16:38,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:38,390 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-10-15 16:16:38,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:16:38,391 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:38,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:38,391 INFO L225 Difference]: With dead ends: 218 [2020-10-15 16:16:38,391 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 16:16:38,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:16:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 16:16:38,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-15 16:16:38,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 16:16:38,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 16:16:38,395 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 16:16:38,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:38,395 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 16:16:38,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:38,395 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 16:16:38,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:38,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:38,396 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:38,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:38,596 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:38,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:38,597 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-10-15 16:16:38,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:38,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83867982] [2020-10-15 16:16:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:38,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83867982] [2020-10-15 16:16:38,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173211834] [2020-10-15 16:16:38,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:38,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:16:38,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:38,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:38,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:38,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:38,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:38,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863776380] [2020-10-15 16:16:38,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:38,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:38,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:38,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:38,912 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 16:16:39,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:39,178 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-10-15 16:16:39,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:16:39,179 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:39,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:39,179 INFO L225 Difference]: With dead ends: 206 [2020-10-15 16:16:39,180 INFO L226 Difference]: Without dead ends: 204 [2020-10-15 16:16:39,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:16:39,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-15 16:16:39,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-10-15 16:16:39,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-15 16:16:39,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-10-15 16:16:39,183 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-10-15 16:16:39,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:39,183 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-10-15 16:16:39,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:39,183 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-10-15 16:16:39,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:39,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:39,183 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:39,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-15 16:16:39,384 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:39,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:39,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-10-15 16:16:39,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:39,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333072958] [2020-10-15 16:16:39,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:39,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333072958] [2020-10-15 16:16:39,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364494601] [2020-10-15 16:16:39,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:39,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:16:39,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:39,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:39,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:39,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:39,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:39,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784721249] [2020-10-15 16:16:39,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:39,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:39,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:39,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:39,735 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-10-15 16:16:40,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:40,037 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-10-15 16:16:40,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:16:40,038 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:40,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:40,039 INFO L225 Difference]: With dead ends: 207 [2020-10-15 16:16:40,039 INFO L226 Difference]: Without dead ends: 205 [2020-10-15 16:16:40,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:16:40,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-15 16:16:40,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-10-15 16:16:40,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 16:16:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-10-15 16:16:40,044 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-10-15 16:16:40,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:40,045 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-10-15 16:16:40,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:40,045 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-10-15 16:16:40,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:40,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:40,045 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:40,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-15 16:16:40,250 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:40,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-10-15 16:16:40,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:40,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134982454] [2020-10-15 16:16:40,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:40,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134982454] [2020-10-15 16:16:40,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52548986] [2020-10-15 16:16:40,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:40,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:16:40,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:40,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:40,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:40,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:40,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:40,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333823821] [2020-10-15 16:16:40,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:40,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:40,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:40,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:40,595 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-10-15 16:16:40,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:40,920 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-10-15 16:16:40,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:16:40,921 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:40,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:40,922 INFO L225 Difference]: With dead ends: 217 [2020-10-15 16:16:40,922 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 16:16:40,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:16:40,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 16:16:40,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-10-15 16:16:40,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 16:16:40,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-10-15 16:16:40,925 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-10-15 16:16:40,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:40,926 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-10-15 16:16:40,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:40,926 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-10-15 16:16:40,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:40,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:40,926 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:41,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-15 16:16:41,127 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:41,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:41,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-10-15 16:16:41,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:41,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532680187] [2020-10-15 16:16:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:41,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532680187] [2020-10-15 16:16:41,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554104459] [2020-10-15 16:16:41,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:41,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:16:41,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:41,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:41,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:42,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:42,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:42,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436943533] [2020-10-15 16:16:42,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:42,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:42,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:42,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:42,176 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-10-15 16:16:42,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:42,596 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-10-15 16:16:42,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:16:42,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:42,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:42,598 INFO L225 Difference]: With dead ends: 223 [2020-10-15 16:16:42,598 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 16:16:42,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:16:42,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 16:16:42,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-10-15 16:16:42,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:16:42,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-10-15 16:16:42,602 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-10-15 16:16:42,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:42,602 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-10-15 16:16:42,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:42,603 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-10-15 16:16:42,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:42,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:42,603 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:42,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-15 16:16:42,808 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:42,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:42,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-10-15 16:16:42,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:42,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759741985] [2020-10-15 16:16:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:42,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759741985] [2020-10-15 16:16:42,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89811352] [2020-10-15 16:16:42,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:42,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:16:42,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:42,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:42,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:43,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:43,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:43,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262186490] [2020-10-15 16:16:43,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:43,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:43,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:43,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:43,155 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-10-15 16:16:43,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:43,475 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-10-15 16:16:43,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:16:43,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:43,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:43,476 INFO L225 Difference]: With dead ends: 225 [2020-10-15 16:16:43,476 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 16:16:43,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:16:43,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 16:16:43,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-10-15 16:16:43,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 16:16:43,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-10-15 16:16:43,480 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-10-15 16:16:43,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:43,480 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-10-15 16:16:43,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:43,480 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-10-15 16:16:43,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:43,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:43,481 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:43,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:43,681 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:43,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:43,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-10-15 16:16:43,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:43,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574879935] [2020-10-15 16:16:43,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:43,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574879935] [2020-10-15 16:16:43,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669376392] [2020-10-15 16:16:43,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:43,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:43,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:44,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:44,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:44,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405165313] [2020-10-15 16:16:44,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:44,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:44,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:44,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:44,067 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-10-15 16:16:44,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:44,386 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-10-15 16:16:44,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:16:44,386 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:44,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:44,387 INFO L225 Difference]: With dead ends: 214 [2020-10-15 16:16:44,387 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 16:16:44,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:16:44,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 16:16:44,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-10-15 16:16:44,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:16:44,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-10-15 16:16:44,391 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-10-15 16:16:44,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:44,391 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-10-15 16:16:44,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-10-15 16:16:44,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:44,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:44,392 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:44,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:44,592 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:44,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:44,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-10-15 16:16:44,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:44,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856911509] [2020-10-15 16:16:44,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:44,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856911509] [2020-10-15 16:16:44,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547533341] [2020-10-15 16:16:44,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:44,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:16:44,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:44,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:44,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:44,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:44,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:44,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843600200] [2020-10-15 16:16:44,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:44,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:44,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:44,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:44,984 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-10-15 16:16:45,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:45,208 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-10-15 16:16:45,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:16:45,209 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:45,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:45,210 INFO L225 Difference]: With dead ends: 203 [2020-10-15 16:16:45,210 INFO L226 Difference]: Without dead ends: 201 [2020-10-15 16:16:45,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-15 16:16:45,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-15 16:16:45,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-10-15 16:16:45,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 16:16:45,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-10-15 16:16:45,213 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-10-15 16:16:45,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:45,213 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-10-15 16:16:45,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:45,213 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-10-15 16:16:45,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:45,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:45,214 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:45,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-15 16:16:45,415 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:45,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:45,415 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-10-15 16:16:45,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:45,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390046503] [2020-10-15 16:16:45,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:45,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390046503] [2020-10-15 16:16:45,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228085827] [2020-10-15 16:16:45,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:45,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:16:45,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:45,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:45,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:45,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:45,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:45,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865468914] [2020-10-15 16:16:45,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:45,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:45,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:45,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:45,839 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-10-15 16:16:45,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:45,926 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-15 16:16:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:16:45,927 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:45,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:45,927 INFO L225 Difference]: With dead ends: 212 [2020-10-15 16:16:45,928 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 16:16:45,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:16:45,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 16:16:45,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-10-15 16:16:45,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:16:45,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-10-15 16:16:45,932 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-10-15 16:16:45,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:45,932 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-10-15 16:16:45,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:45,932 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-10-15 16:16:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:45,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:45,932 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:46,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:46,133 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:46,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:46,134 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-10-15 16:16:46,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:46,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239715390] [2020-10-15 16:16:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:46,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239715390] [2020-10-15 16:16:46,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458264020] [2020-10-15 16:16:46,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:46,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:16:46,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:46,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:46,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:46,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:46,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:46,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390839301] [2020-10-15 16:16:46,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:46,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:46,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:46,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:46,557 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-10-15 16:16:46,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:46,834 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-10-15 16:16:46,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:16:46,835 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:46,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:46,835 INFO L225 Difference]: With dead ends: 217 [2020-10-15 16:16:46,836 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 16:16:46,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:16:46,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 16:16:46,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-10-15 16:16:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:16:46,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-15 16:16:46,840 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-15 16:16:46,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:46,840 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-15 16:16:46,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:46,840 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-15 16:16:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:46,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:46,841 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:47,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:47,041 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:47,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:47,042 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-10-15 16:16:47,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:47,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3475214] [2020-10-15 16:16:47,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:47,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3475214] [2020-10-15 16:16:47,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469777084] [2020-10-15 16:16:47,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:47,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:16:47,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:47,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:47,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:47,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:47,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:47,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333245756] [2020-10-15 16:16:47,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:47,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:47,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:47,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:47,447 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-15 16:16:47,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:47,804 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-15 16:16:47,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:16:47,805 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:47,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:47,805 INFO L225 Difference]: With dead ends: 227 [2020-10-15 16:16:47,806 INFO L226 Difference]: Without dead ends: 225 [2020-10-15 16:16:47,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:16:47,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-15 16:16:47,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-10-15 16:16:47,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:16:47,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-10-15 16:16:47,809 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-10-15 16:16:47,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:47,809 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-10-15 16:16:47,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:47,809 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-10-15 16:16:47,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:47,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:47,810 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:48,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:48,011 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:48,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:48,011 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-10-15 16:16:48,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:48,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568692319] [2020-10-15 16:16:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:48,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568692319] [2020-10-15 16:16:48,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979044102] [2020-10-15 16:16:48,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:48,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:16:48,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:48,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:48,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:48,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:48,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:48,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423797249] [2020-10-15 16:16:48,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:48,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:48,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:48,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:48,439 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-10-15 16:16:48,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:48,860 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-15 16:16:48,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:16:48,860 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:48,861 INFO L225 Difference]: With dead ends: 227 [2020-10-15 16:16:48,861 INFO L226 Difference]: Without dead ends: 225 [2020-10-15 16:16:48,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:16:48,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-15 16:16:48,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-10-15 16:16:48,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:16:48,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-15 16:16:48,864 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-15 16:16:48,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:48,865 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-15 16:16:48,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:48,865 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-15 16:16:48,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:48,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:48,865 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:49,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-15 16:16:49,067 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:49,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:49,068 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-10-15 16:16:49,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:49,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704776329] [2020-10-15 16:16:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:49,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704776329] [2020-10-15 16:16:49,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648281294] [2020-10-15 16:16:49,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:49,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:49,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:52,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:52,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:52,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65472184] [2020-10-15 16:16:52,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:52,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:52,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:52,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:16:52,867 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-15 16:16:57,110 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:16:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:57,454 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-10-15 16:16:57,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:16:57,455 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:57,455 INFO L225 Difference]: With dead ends: 237 [2020-10-15 16:16:57,455 INFO L226 Difference]: Without dead ends: 235 [2020-10-15 16:16:57,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-15 16:16:57,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-15 16:16:57,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-10-15 16:16:57,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:16:57,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 16:16:57,459 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 16:16:57,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:57,459 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 16:16:57,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:57,459 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 16:16:57,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:57,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:57,460 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:57,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-15 16:16:57,660 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:57,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:57,661 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-10-15 16:16:57,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:57,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424295905] [2020-10-15 16:16:57,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:57,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424295905] [2020-10-15 16:16:57,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356761471] [2020-10-15 16:16:57,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:57,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:16:57,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:57,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:57,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:58,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:58,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:58,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216367777] [2020-10-15 16:16:58,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:58,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:58,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:58,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:58,103 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 16:16:58,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:58,580 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-10-15 16:16:58,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:16:58,581 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:58,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:58,581 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:16:58,581 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:16:58,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:16:58,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:16:58,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-15 16:16:58,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:16:58,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-10-15 16:16:58,584 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-10-15 16:16:58,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:58,584 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-10-15 16:16:58,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:58,584 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-10-15 16:16:58,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:58,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:58,584 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:58,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-15 16:16:58,785 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:58,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:58,786 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-10-15 16:16:58,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:58,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277075734] [2020-10-15 16:16:58,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:16:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:58,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277075734] [2020-10-15 16:16:58,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521094227] [2020-10-15 16:16:58,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:16:58,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:16:58,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:16:58,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:16:58,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:16:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:16:59,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:16:59,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:16:59,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314159295] [2020-10-15 16:16:59,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:16:59,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:16:59,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:16:59,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:16:59,151 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-10-15 16:16:59,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:16:59,742 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-10-15 16:16:59,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:16:59,743 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:16:59,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:16:59,744 INFO L225 Difference]: With dead ends: 225 [2020-10-15 16:16:59,744 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 16:16:59,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:16:59,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 16:16:59,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-10-15 16:16:59,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:16:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 16:16:59,749 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 16:16:59,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:16:59,749 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 16:16:59,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:16:59,749 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 16:16:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:16:59,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:16:59,750 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:16:59,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-15 16:16:59,958 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:16:59,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:16:59,959 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-10-15 16:16:59,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:16:59,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286386303] [2020-10-15 16:16:59,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:16:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:00,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286386303] [2020-10-15 16:17:00,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612655096] [2020-10-15 16:17:00,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:00,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:00,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:00,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:00,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:00,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:00,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:00,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447950717] [2020-10-15 16:17:00,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:00,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:00,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:00,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:00,329 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 16:17:00,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:00,824 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-10-15 16:17:00,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:17:00,825 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:00,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:00,826 INFO L225 Difference]: With dead ends: 239 [2020-10-15 16:17:00,826 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 16:17:00,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:17:00,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 16:17:00,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-15 16:17:00,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:17:00,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 16:17:00,829 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 16:17:00,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:00,829 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 16:17:00,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:00,829 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 16:17:00,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:00,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:00,830 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:01,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-15 16:17:01,031 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:01,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:01,031 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-10-15 16:17:01,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:01,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478191572] [2020-10-15 16:17:01,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:01,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478191572] [2020-10-15 16:17:01,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082256450] [2020-10-15 16:17:01,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:01,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:01,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:01,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:01,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:01,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:01,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:01,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68983996] [2020-10-15 16:17:01,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:01,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:01,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:01,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:01,371 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 16:17:01,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:01,755 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-10-15 16:17:01,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:17:01,756 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:01,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:01,756 INFO L225 Difference]: With dead ends: 234 [2020-10-15 16:17:01,756 INFO L226 Difference]: Without dead ends: 232 [2020-10-15 16:17:01,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:17:01,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-15 16:17:01,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-10-15 16:17:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:17:01,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 16:17:01,760 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 16:17:01,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:01,760 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 16:17:01,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:01,760 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 16:17:01,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:01,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:01,763 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:01,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-15 16:17:01,972 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:01,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:01,972 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-10-15 16:17:01,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:01,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444963373] [2020-10-15 16:17:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:02,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444963373] [2020-10-15 16:17:02,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114293665] [2020-10-15 16:17:02,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:02,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:02,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:02,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:02,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:02,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:02,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:02,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401859119] [2020-10-15 16:17:02,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:02,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:02,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:02,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:02,304 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 16:17:02,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:02,625 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-10-15 16:17:02,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:17:02,626 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:02,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:02,626 INFO L225 Difference]: With dead ends: 218 [2020-10-15 16:17:02,626 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 16:17:02,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:17:02,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 16:17:02,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-10-15 16:17:02,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 16:17:02,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-10-15 16:17:02,629 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-10-15 16:17:02,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:02,629 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-10-15 16:17:02,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:02,629 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-10-15 16:17:02,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:02,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:02,629 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:02,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:02,830 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:02,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:02,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-10-15 16:17:02,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:02,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297592753] [2020-10-15 16:17:02,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:02,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297592753] [2020-10-15 16:17:02,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599891187] [2020-10-15 16:17:02,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:03,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:03,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:03,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:03,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:03,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:03,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588686911] [2020-10-15 16:17:03,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:03,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:03,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:03,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:03,195 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-10-15 16:17:03,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:03,305 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-10-15 16:17:03,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:17:03,306 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:03,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:03,306 INFO L225 Difference]: With dead ends: 208 [2020-10-15 16:17:03,306 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 16:17:03,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:17:03,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 16:17:03,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-10-15 16:17:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:17:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-10-15 16:17:03,310 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-10-15 16:17:03,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:03,310 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-10-15 16:17:03,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:03,310 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-10-15 16:17:03,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:03,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:03,310 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:03,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:03,511 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:03,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:03,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-10-15 16:17:03,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:03,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559507394] [2020-10-15 16:17:03,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:03,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559507394] [2020-10-15 16:17:03,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138996990] [2020-10-15 16:17:03,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:03,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:03,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:03,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:03,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:03,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:03,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:03,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389869620] [2020-10-15 16:17:03,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:03,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:03,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:03,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:03,871 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-10-15 16:17:04,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:04,155 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-10-15 16:17:04,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:17:04,156 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:04,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:04,157 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:17:04,157 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:17:04,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-15 16:17:04,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:17:04,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-10-15 16:17:04,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:17:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-15 16:17:04,159 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-15 16:17:04,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:04,160 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-15 16:17:04,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:04,160 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-15 16:17:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:04,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:04,160 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:04,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:04,361 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:04,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:04,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-10-15 16:17:04,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:04,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920229520] [2020-10-15 16:17:04,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:04,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920229520] [2020-10-15 16:17:04,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201248276] [2020-10-15 16:17:04,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:04,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:17:04,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:04,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:04,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:04,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:04,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:04,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914022200] [2020-10-15 16:17:04,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:04,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:04,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:04,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:04,737 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-15 16:17:05,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:05,135 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-10-15 16:17:05,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:17:05,136 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:05,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:05,136 INFO L225 Difference]: With dead ends: 235 [2020-10-15 16:17:05,137 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:17:05,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:17:05,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:17:05,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-10-15 16:17:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 16:17:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-10-15 16:17:05,140 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-10-15 16:17:05,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:05,140 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-10-15 16:17:05,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:05,140 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-10-15 16:17:05,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:05,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:05,141 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:05,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:05,341 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:05,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:05,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-10-15 16:17:05,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:05,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596557585] [2020-10-15 16:17:05,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:05,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596557585] [2020-10-15 16:17:05,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967374366] [2020-10-15 16:17:05,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:05,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:05,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:05,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:05,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:05,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:05,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:05,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718973154] [2020-10-15 16:17:05,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:05,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:05,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:05,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:05,736 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-10-15 16:17:06,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:06,209 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2020-10-15 16:17:06,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:17:06,210 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:06,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:06,211 INFO L225 Difference]: With dead ends: 233 [2020-10-15 16:17:06,211 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 16:17:06,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:17:06,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 16:17:06,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-10-15 16:17:06,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:17:06,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-15 16:17:06,215 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-15 16:17:06,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:06,216 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-15 16:17:06,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:06,216 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-15 16:17:06,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:06,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:06,216 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:06,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:06,424 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:06,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:06,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-10-15 16:17:06,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:06,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655646862] [2020-10-15 16:17:06,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:06,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655646862] [2020-10-15 16:17:06,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334925882] [2020-10-15 16:17:06,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:06,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:06,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:06,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:06,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:11,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:11,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:11,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856774525] [2020-10-15 16:17:11,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:11,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:11,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:11,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:17:11,019 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-15 16:17:15,285 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:17:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:15,661 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-10-15 16:17:15,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:17:15,662 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:15,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:15,663 INFO L225 Difference]: With dead ends: 241 [2020-10-15 16:17:15,663 INFO L226 Difference]: Without dead ends: 239 [2020-10-15 16:17:15,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-10-15 16:17:15,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-15 16:17:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-15 16:17:15,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:17:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-10-15 16:17:15,667 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-10-15 16:17:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:15,667 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-10-15 16:17:15,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-10-15 16:17:15,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:15,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:15,668 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:15,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:15,868 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:15,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:15,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1428494772, now seen corresponding path program 144 times [2020-10-15 16:17:15,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:15,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501189189] [2020-10-15 16:17:15,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:15,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501189189] [2020-10-15 16:17:15,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480623174] [2020-10-15 16:17:15,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:16,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:16,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:16,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:16,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:16,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:16,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:16,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659849837] [2020-10-15 16:17:16,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:16,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:16,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:16,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:16,256 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-10-15 16:17:16,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:16,753 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-10-15 16:17:16,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:17:16,754 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:16,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:16,755 INFO L225 Difference]: With dead ends: 233 [2020-10-15 16:17:16,755 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 16:17:16,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:17:16,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 16:17:16,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-10-15 16:17:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:17:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-10-15 16:17:16,759 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-10-15 16:17:16,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:16,759 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-10-15 16:17:16,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:16,759 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-10-15 16:17:16,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:16,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:16,760 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:16,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-10-15 16:17:16,960 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:16,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:16,961 INFO L82 PathProgramCache]: Analyzing trace with hash -792218594, now seen corresponding path program 145 times [2020-10-15 16:17:16,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:16,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817664625] [2020-10-15 16:17:16,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:17,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817664625] [2020-10-15 16:17:17,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989594395] [2020-10-15 16:17:17,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:17,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:17,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:17,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:17,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:17,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135368727] [2020-10-15 16:17:17,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:17,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:17,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:17,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:17,341 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-10-15 16:17:17,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:17,482 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-10-15 16:17:17,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:17:17,483 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:17,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:17,483 INFO L225 Difference]: With dead ends: 204 [2020-10-15 16:17:17,484 INFO L226 Difference]: Without dead ends: 202 [2020-10-15 16:17:17,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:17:17,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-15 16:17:17,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-10-15 16:17:17,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:17:17,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-10-15 16:17:17,487 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-10-15 16:17:17,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:17,487 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-10-15 16:17:17,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:17,487 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-10-15 16:17:17,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:17,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:17,488 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:17,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:17,688 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:17,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:17,689 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 146 times [2020-10-15 16:17:17,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:17,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458831402] [2020-10-15 16:17:17,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:17,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458831402] [2020-10-15 16:17:17,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093703072] [2020-10-15 16:17:17,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:17,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:17,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:17,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:17,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:18,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:18,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:18,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574512765] [2020-10-15 16:17:18,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:18,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:18,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:18,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:18,038 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-10-15 16:17:18,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:18,362 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-10-15 16:17:18,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:17:18,363 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:18,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:18,364 INFO L225 Difference]: With dead ends: 225 [2020-10-15 16:17:18,364 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 16:17:18,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:17:18,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 16:17:18,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-10-15 16:17:18,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:17:18,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-10-15 16:17:18,367 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-10-15 16:17:18,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:18,367 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-10-15 16:17:18,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:18,367 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-10-15 16:17:18,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:18,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:18,368 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:18,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-15 16:17:18,569 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:18,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:18,569 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 147 times [2020-10-15 16:17:18,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:18,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677239435] [2020-10-15 16:17:18,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:18,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677239435] [2020-10-15 16:17:18,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911814656] [2020-10-15 16:17:18,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:18,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:17:18,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:18,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:18,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:19,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:19,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:19,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293644802] [2020-10-15 16:17:19,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:19,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:19,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:19,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:19,679 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-10-15 16:17:20,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:20,108 INFO L93 Difference]: Finished difference Result 231 states and 539 transitions. [2020-10-15 16:17:20,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:17:20,109 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:20,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:20,109 INFO L225 Difference]: With dead ends: 231 [2020-10-15 16:17:20,109 INFO L226 Difference]: Without dead ends: 229 [2020-10-15 16:17:20,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:17:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-15 16:17:20,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-10-15 16:17:20,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 16:17:20,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-10-15 16:17:20,113 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-10-15 16:17:20,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:20,113 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-10-15 16:17:20,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:20,113 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-10-15 16:17:20,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:20,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:20,114 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:20,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:20,314 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:20,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:20,315 INFO L82 PathProgramCache]: Analyzing trace with hash -771662804, now seen corresponding path program 148 times [2020-10-15 16:17:20,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:20,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810342499] [2020-10-15 16:17:20,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:20,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810342499] [2020-10-15 16:17:20,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260990694] [2020-10-15 16:17:20,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:20,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:20,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:20,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:20,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:20,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:20,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:20,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148958295] [2020-10-15 16:17:20,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:20,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:20,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:20,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:20,679 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-10-15 16:17:20,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:20,876 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-10-15 16:17:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 16:17:20,877 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:20,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:20,877 INFO L225 Difference]: With dead ends: 200 [2020-10-15 16:17:20,877 INFO L226 Difference]: Without dead ends: 198 [2020-10-15 16:17:20,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 16:17:20,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-15 16:17:20,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-10-15 16:17:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:17:20,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-10-15 16:17:20,880 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-10-15 16:17:20,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:20,880 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-10-15 16:17:20,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-10-15 16:17:20,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:20,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:20,881 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:21,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:21,085 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:21,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:21,085 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 149 times [2020-10-15 16:17:21,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:21,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152530509] [2020-10-15 16:17:21,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:21,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152530509] [2020-10-15 16:17:21,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783419831] [2020-10-15 16:17:21,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:21,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:21,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:21,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:21,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:21,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:21,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:21,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:21,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979267563] [2020-10-15 16:17:21,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:21,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:21,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:21,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:21,437 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-10-15 16:17:21,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:21,796 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-10-15 16:17:21,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:17:21,796 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:21,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:21,797 INFO L225 Difference]: With dead ends: 221 [2020-10-15 16:17:21,797 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 16:17:21,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:17:21,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 16:17:21,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2020-10-15 16:17:21,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:17:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-10-15 16:17:21,801 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-10-15 16:17:21,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:21,801 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-10-15 16:17:21,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:21,801 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-10-15 16:17:21,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:21,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:21,802 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:22,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-10-15 16:17:22,011 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:22,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:22,011 INFO L82 PathProgramCache]: Analyzing trace with hash -770999714, now seen corresponding path program 150 times [2020-10-15 16:17:22,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:22,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712111882] [2020-10-15 16:17:22,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:22,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712111882] [2020-10-15 16:17:22,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843306714] [2020-10-15 16:17:22,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:22,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:22,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:22,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 16:17:22,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:22,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:22,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 16:17:22,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638512903] [2020-10-15 16:17:22,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 16:17:22,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:22,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 16:17:22,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-15 16:17:22,204 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 11 states. [2020-10-15 16:17:22,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:22,373 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-10-15 16:17:22,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:17:22,374 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 16:17:22,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:22,375 INFO L225 Difference]: With dead ends: 201 [2020-10-15 16:17:22,375 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 16:17:22,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:17:22,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 16:17:22,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-10-15 16:17:22,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:17:22,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 16:17:22,378 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 16:17:22,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:22,378 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 16:17:22,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 16:17:22,378 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 16:17:22,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:22,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:22,379 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:22,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:22,580 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:22,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:22,580 INFO L82 PathProgramCache]: Analyzing trace with hash -770977394, now seen corresponding path program 151 times [2020-10-15 16:17:22,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:22,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100287607] [2020-10-15 16:17:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:22,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100287607] [2020-10-15 16:17:22,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848568608] [2020-10-15 16:17:22,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:22,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:22,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:22,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:22,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:22,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:22,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148165936] [2020-10-15 16:17:22,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:22,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:22,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:22,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:22,926 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 16:17:23,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:23,453 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-10-15 16:17:23,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:17:23,454 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:23,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:23,454 INFO L225 Difference]: With dead ends: 226 [2020-10-15 16:17:23,455 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 16:17:23,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:17:23,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 16:17:23,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-10-15 16:17:23,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:17:23,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-15 16:17:23,457 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-15 16:17:23,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:23,457 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-15 16:17:23,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:23,457 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-15 16:17:23,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:23,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:23,458 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:23,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:23,659 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:23,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:23,659 INFO L82 PathProgramCache]: Analyzing trace with hash -770969923, now seen corresponding path program 152 times [2020-10-15 16:17:23,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:23,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102471781] [2020-10-15 16:17:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:23,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102471781] [2020-10-15 16:17:23,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822224672] [2020-10-15 16:17:23,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:23,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:23,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:23,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:23,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:24,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:24,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:24,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37718277] [2020-10-15 16:17:24,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:24,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:24,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:24,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:24,024 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-15 16:17:24,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:24,455 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-15 16:17:24,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:17:24,457 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:24,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:24,457 INFO L225 Difference]: With dead ends: 218 [2020-10-15 16:17:24,458 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 16:17:24,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:17:24,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 16:17:24,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-10-15 16:17:24,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:17:24,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 16:17:24,461 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 16:17:24,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:24,461 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 16:17:24,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:24,461 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 16:17:24,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:24,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:24,462 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:24,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:24,663 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:24,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:24,663 INFO L82 PathProgramCache]: Analyzing trace with hash -770948564, now seen corresponding path program 153 times [2020-10-15 16:17:24,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:24,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491785570] [2020-10-15 16:17:24,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:24,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491785570] [2020-10-15 16:17:24,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323401820] [2020-10-15 16:17:24,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:24,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:17:24,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:24,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:24,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:24,990 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:17:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:25,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:25,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:25,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513067586] [2020-10-15 16:17:25,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:25,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:25,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:25,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:25,029 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 16:17:25,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:25,720 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-10-15 16:17:25,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:17:25,721 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:25,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:25,722 INFO L225 Difference]: With dead ends: 248 [2020-10-15 16:17:25,722 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 16:17:25,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:17:25,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 16:17:25,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-10-15 16:17:25,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:17:25,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 16:17:25,726 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 16:17:25,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:25,726 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 16:17:25,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:25,726 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 16:17:25,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:25,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:25,726 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:25,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:25,927 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:25,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:25,928 INFO L82 PathProgramCache]: Analyzing trace with hash -770947603, now seen corresponding path program 154 times [2020-10-15 16:17:25,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:25,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888689170] [2020-10-15 16:17:25,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:26,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888689170] [2020-10-15 16:17:26,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024366208] [2020-10-15 16:17:26,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:26,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:26,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:26,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:26,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:26,217 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:17:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:26,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:26,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:26,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431038638] [2020-10-15 16:17:26,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:26,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:26,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:26,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:26,243 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 16:17:26,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:26,776 INFO L93 Difference]: Finished difference Result 238 states and 567 transitions. [2020-10-15 16:17:26,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:17:26,776 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:26,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:26,777 INFO L225 Difference]: With dead ends: 238 [2020-10-15 16:17:26,777 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:17:26,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:17:26,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:17:26,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-15 16:17:26,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:17:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-15 16:17:26,780 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-15 16:17:26,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:26,780 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-15 16:17:26,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:26,780 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-15 16:17:26,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:26,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:26,780 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:26,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:26,981 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:26,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:26,982 INFO L82 PathProgramCache]: Analyzing trace with hash -770739283, now seen corresponding path program 155 times [2020-10-15 16:17:26,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:26,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717788093] [2020-10-15 16:17:26,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:27,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717788093] [2020-10-15 16:17:27,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594120507] [2020-10-15 16:17:27,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:27,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:17:27,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:27,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:27,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:27,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:27,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:27,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196402757] [2020-10-15 16:17:27,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:27,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:27,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:27,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:27,603 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-15 16:17:28,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:28,210 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-10-15 16:17:28,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:17:28,211 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:28,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:28,212 INFO L225 Difference]: With dead ends: 235 [2020-10-15 16:17:28,212 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:17:28,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:17:28,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:17:28,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-10-15 16:17:28,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:17:28,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-15 16:17:28,216 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-15 16:17:28,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:28,216 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-15 16:17:28,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:28,216 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-15 16:17:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:28,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:28,217 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:28,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:28,425 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:28,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:28,426 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 156 times [2020-10-15 16:17:28,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:28,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856718452] [2020-10-15 16:17:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:28,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856718452] [2020-10-15 16:17:28,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810573050] [2020-10-15 16:17:28,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:28,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:17:28,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:28,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:28,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:28,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:28,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:28,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074766695] [2020-10-15 16:17:28,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:28,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:28,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:28,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:28,806 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-15 16:17:29,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:29,446 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-10-15 16:17:29,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:17:29,447 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:29,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:29,448 INFO L225 Difference]: With dead ends: 252 [2020-10-15 16:17:29,448 INFO L226 Difference]: Without dead ends: 250 [2020-10-15 16:17:29,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:17:29,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-15 16:17:29,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-10-15 16:17:29,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:17:29,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 16:17:29,451 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 16:17:29,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:29,451 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 16:17:29,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:29,452 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 16:17:29,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:29,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:29,452 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:29,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-15 16:17:29,653 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:29,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:29,654 INFO L82 PathProgramCache]: Analyzing trace with hash -770054834, now seen corresponding path program 157 times [2020-10-15 16:17:29,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:29,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260084421] [2020-10-15 16:17:29,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:29,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260084421] [2020-10-15 16:17:29,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634136424] [2020-10-15 16:17:29,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:29,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:29,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:30,022 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:17:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:30,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:30,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:30,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989540792] [2020-10-15 16:17:30,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:30,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:30,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:30,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:30,070 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 16:17:30,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:30,891 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-10-15 16:17:30,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:17:30,892 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:30,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:30,893 INFO L225 Difference]: With dead ends: 258 [2020-10-15 16:17:30,893 INFO L226 Difference]: Without dead ends: 253 [2020-10-15 16:17:30,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:17:30,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-15 16:17:30,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-15 16:17:30,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:17:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 16:17:30,896 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 16:17:30,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:30,896 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 16:17:30,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:30,896 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 16:17:30,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:30,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:30,896 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:31,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-10-15 16:17:31,100 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:31,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:31,100 INFO L82 PathProgramCache]: Analyzing trace with hash -770053873, now seen corresponding path program 158 times [2020-10-15 16:17:31,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:31,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848495571] [2020-10-15 16:17:31,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:31,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848495571] [2020-10-15 16:17:31,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449766979] [2020-10-15 16:17:31,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:31,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:31,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:31,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:31,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:33,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:17:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:33,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:33,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:33,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810250730] [2020-10-15 16:17:33,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:33,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:33,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:33,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:17:33,763 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 16:17:38,068 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-15 16:17:42,328 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-15 16:17:43,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:43,333 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-10-15 16:17:43,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:17:43,334 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:43,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:43,335 INFO L225 Difference]: With dead ends: 287 [2020-10-15 16:17:43,335 INFO L226 Difference]: Without dead ends: 279 [2020-10-15 16:17:43,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-10-15 16:17:43,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-15 16:17:43,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-10-15 16:17:43,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:17:43,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-10-15 16:17:43,340 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-10-15 16:17:43,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:43,341 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-10-15 16:17:43,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:43,341 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-10-15 16:17:43,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:43,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:43,341 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:43,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-10-15 16:17:43,546 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:43,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:43,547 INFO L82 PathProgramCache]: Analyzing trace with hash -770025043, now seen corresponding path program 159 times [2020-10-15 16:17:43,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:43,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262714999] [2020-10-15 16:17:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:43,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262714999] [2020-10-15 16:17:43,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866544918] [2020-10-15 16:17:43,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:43,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:17:43,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:43,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:43,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:43,887 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:17:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:43,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:43,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:43,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290497303] [2020-10-15 16:17:43,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:43,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:43,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:43,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:43,916 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 17 states. [2020-10-15 16:17:44,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:44,727 INFO L93 Difference]: Finished difference Result 260 states and 621 transitions. [2020-10-15 16:17:44,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:17:44,729 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:44,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:44,730 INFO L225 Difference]: With dead ends: 260 [2020-10-15 16:17:44,730 INFO L226 Difference]: Without dead ends: 255 [2020-10-15 16:17:44,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:17:44,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-15 16:17:44,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 160. [2020-10-15 16:17:44,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:17:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-10-15 16:17:44,733 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-10-15 16:17:44,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:44,734 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-10-15 16:17:44,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:44,734 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-10-15 16:17:44,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:44,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:44,734 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:44,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:44,935 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:44,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:44,935 INFO L82 PathProgramCache]: Analyzing trace with hash -763589443, now seen corresponding path program 160 times [2020-10-15 16:17:44,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:44,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938929031] [2020-10-15 16:17:44,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:45,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938929031] [2020-10-15 16:17:45,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479149843] [2020-10-15 16:17:45,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:45,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:17:45,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:45,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:45,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:45,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:45,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:45,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111168042] [2020-10-15 16:17:45,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:45,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:45,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:45,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:17:45,349 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-10-15 16:17:45,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:17:45,822 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-10-15 16:17:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:17:45,823 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:17:45,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:17:45,824 INFO L225 Difference]: With dead ends: 235 [2020-10-15 16:17:45,824 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:17:45,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:17:45,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:17:45,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-10-15 16:17:45,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:17:45,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-10-15 16:17:45,828 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-10-15 16:17:45,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:17:45,828 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-10-15 16:17:45,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:17:45,828 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-10-15 16:17:45,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:17:45,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:17:45,828 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:17:46,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:46,029 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:17:46,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:17:46,030 INFO L82 PathProgramCache]: Analyzing trace with hash -763588482, now seen corresponding path program 161 times [2020-10-15 16:17:46,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:17:46,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171994255] [2020-10-15 16:17:46,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:17:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:17:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:46,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171994255] [2020-10-15 16:17:46,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204655052] [2020-10-15 16:17:46,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:17:46,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:17:46,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:17:46,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:17:46,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:17:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:17:49,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:17:49,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:17:49,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605282228] [2020-10-15 16:17:49,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:17:49,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:17:49,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:17:49,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:17:49,706 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand 17 states. [2020-10-15 16:17:54,045 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:18:00,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:00,478 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2020-10-15 16:18:00,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:18:00,479 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:00,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:00,480 INFO L225 Difference]: With dead ends: 241 [2020-10-15 16:18:00,480 INFO L226 Difference]: Without dead ends: 239 [2020-10-15 16:18:00,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=193, Invalid=508, Unknown=1, NotChecked=0, Total=702 [2020-10-15 16:18:00,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-15 16:18:00,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-15 16:18:00,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:18:00,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 400 transitions. [2020-10-15 16:18:00,484 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 400 transitions. Word has length 14 [2020-10-15 16:18:00,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:00,484 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 400 transitions. [2020-10-15 16:18:00,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:00,484 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 400 transitions. [2020-10-15 16:18:00,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:00,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:00,485 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:00,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-10-15 16:18:00,685 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:00,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:00,686 INFO L82 PathProgramCache]: Analyzing trace with hash -763559652, now seen corresponding path program 162 times [2020-10-15 16:18:00,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:00,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776000874] [2020-10-15 16:18:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:00,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776000874] [2020-10-15 16:18:00,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278526865] [2020-10-15 16:18:00,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:00,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:18:00,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:00,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:00,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:01,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:01,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:01,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536409] [2020-10-15 16:18:01,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:01,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:01,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:01,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:01,131 INFO L87 Difference]: Start difference. First operand 163 states and 400 transitions. Second operand 17 states. [2020-10-15 16:18:01,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:01,652 INFO L93 Difference]: Finished difference Result 235 states and 546 transitions. [2020-10-15 16:18:01,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:18:01,654 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:01,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:01,654 INFO L225 Difference]: With dead ends: 235 [2020-10-15 16:18:01,654 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 16:18:01,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:18:01,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 16:18:01,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-15 16:18:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:18:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-15 16:18:01,657 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-15 16:18:01,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:01,658 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-15 16:18:01,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:01,658 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-15 16:18:01,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:01,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:01,658 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:01,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:01,859 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:01,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:01,860 INFO L82 PathProgramCache]: Analyzing trace with hash -743033653, now seen corresponding path program 163 times [2020-10-15 16:18:01,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:01,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712437603] [2020-10-15 16:18:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:01,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712437603] [2020-10-15 16:18:01,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307420527] [2020-10-15 16:18:01,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:02,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:02,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:02,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:02,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:02,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644418344] [2020-10-15 16:18:02,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:02,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:02,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:02,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:02,291 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-15 16:18:03,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:03,091 INFO L93 Difference]: Finished difference Result 254 states and 587 transitions. [2020-10-15 16:18:03,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:18:03,092 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:03,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:03,093 INFO L225 Difference]: With dead ends: 254 [2020-10-15 16:18:03,093 INFO L226 Difference]: Without dead ends: 252 [2020-10-15 16:18:03,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:18:03,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-15 16:18:03,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2020-10-15 16:18:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:18:03,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 405 transitions. [2020-10-15 16:18:03,096 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 405 transitions. Word has length 14 [2020-10-15 16:18:03,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:03,096 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 405 transitions. [2020-10-15 16:18:03,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:03,096 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 405 transitions. [2020-10-15 16:18:03,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:03,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:03,097 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:03,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-10-15 16:18:03,297 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:03,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:03,299 INFO L82 PathProgramCache]: Analyzing trace with hash -743032692, now seen corresponding path program 164 times [2020-10-15 16:18:03,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:03,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423670968] [2020-10-15 16:18:03,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:03,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423670968] [2020-10-15 16:18:03,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068522932] [2020-10-15 16:18:03,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:03,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:18:03,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:03,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:03,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:04,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:04,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:04,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553636485] [2020-10-15 16:18:04,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:04,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:04,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:04,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:04,704 INFO L87 Difference]: Start difference. First operand 164 states and 405 transitions. Second operand 17 states. [2020-10-15 16:18:09,116 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:18:23,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:23,902 INFO L93 Difference]: Finished difference Result 264 states and 610 transitions. [2020-10-15 16:18:23,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:18:23,902 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:23,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:23,903 INFO L225 Difference]: With dead ends: 264 [2020-10-15 16:18:23,903 INFO L226 Difference]: Without dead ends: 262 [2020-10-15 16:18:23,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=289, Invalid=699, Unknown=4, NotChecked=0, Total=992 [2020-10-15 16:18:23,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-15 16:18:23,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 165. [2020-10-15 16:18:23,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:18:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-15 16:18:23,907 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-15 16:18:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:23,907 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-15 16:18:23,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:23,907 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-15 16:18:23,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:23,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:23,908 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:24,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:24,108 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:24,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:24,109 INFO L82 PathProgramCache]: Analyzing trace with hash -742370563, now seen corresponding path program 165 times [2020-10-15 16:18:24,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:24,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943984507] [2020-10-15 16:18:24,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:24,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943984507] [2020-10-15 16:18:24,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232916893] [2020-10-15 16:18:24,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:24,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:18:24,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:24,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:24,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:25,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:25,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:25,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408920460] [2020-10-15 16:18:25,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:25,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:25,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:25,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:25,598 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-15 16:18:26,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:26,386 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-10-15 16:18:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:18:26,387 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:26,388 INFO L225 Difference]: With dead ends: 255 [2020-10-15 16:18:26,388 INFO L226 Difference]: Without dead ends: 253 [2020-10-15 16:18:26,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:18:26,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-15 16:18:26,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-15 16:18:26,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:18:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 16:18:26,391 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 16:18:26,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:26,392 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 16:18:26,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:26,392 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 16:18:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:26,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:26,392 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:26,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:26,593 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:26,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:26,594 INFO L82 PathProgramCache]: Analyzing trace with hash -742349204, now seen corresponding path program 166 times [2020-10-15 16:18:26,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:26,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31070458] [2020-10-15 16:18:26,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:26,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31070458] [2020-10-15 16:18:26,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41834105] [2020-10-15 16:18:26,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:26,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:18:26,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:26,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:26,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:26,938 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:18:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:26,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:26,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:26,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183243917] [2020-10-15 16:18:26,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:26,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:26,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:26,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:26,991 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 16:18:28,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:28,047 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-10-15 16:18:28,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:18:28,048 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:28,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:28,049 INFO L225 Difference]: With dead ends: 256 [2020-10-15 16:18:28,049 INFO L226 Difference]: Without dead ends: 251 [2020-10-15 16:18:28,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:18:28,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-15 16:18:28,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-10-15 16:18:28,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:18:28,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 16:18:28,053 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 16:18:28,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:28,053 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 16:18:28,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:28,053 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 16:18:28,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:28,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:28,054 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:28,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-15 16:18:28,255 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:28,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:28,255 INFO L82 PathProgramCache]: Analyzing trace with hash -742348243, now seen corresponding path program 167 times [2020-10-15 16:18:28,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:28,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499786163] [2020-10-15 16:18:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:28,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499786163] [2020-10-15 16:18:28,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479680628] [2020-10-15 16:18:28,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:28,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:18:28,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:28,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:28,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:28,686 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:28,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:28,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:28,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:28,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:28,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:28,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:28,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:28,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:28,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:28,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518496856] [2020-10-15 16:18:28,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:28,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:28,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:28,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:18:28,771 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 16:18:30,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:30,338 INFO L93 Difference]: Finished difference Result 279 states and 667 transitions. [2020-10-15 16:18:30,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:18:30,339 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:30,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:30,340 INFO L225 Difference]: With dead ends: 279 [2020-10-15 16:18:30,340 INFO L226 Difference]: Without dead ends: 274 [2020-10-15 16:18:30,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:18:30,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-15 16:18:30,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 165. [2020-10-15 16:18:30,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:18:30,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-15 16:18:30,345 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-15 16:18:30,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:30,345 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-15 16:18:30,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:30,345 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-15 16:18:30,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:30,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:30,346 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:30,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-15 16:18:30,554 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:30,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:30,555 INFO L82 PathProgramCache]: Analyzing trace with hash -742340772, now seen corresponding path program 168 times [2020-10-15 16:18:30,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:30,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908064811] [2020-10-15 16:18:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:30,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:30,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908064811] [2020-10-15 16:18:30,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085736189] [2020-10-15 16:18:30,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:30,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:18:30,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:18:30,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:30,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:34,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:34,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:34,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196811858] [2020-10-15 16:18:34,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:34,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:34,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:34,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:18:34,068 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-15 16:18:38,485 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 16:18:42,779 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:18:43,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:18:43,456 INFO L93 Difference]: Finished difference Result 271 states and 639 transitions. [2020-10-15 16:18:43,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:18:43,457 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:18:43,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:18:43,458 INFO L225 Difference]: With dead ends: 271 [2020-10-15 16:18:43,458 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 16:18:43,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=348, Invalid=841, Unknown=1, NotChecked=0, Total=1190 [2020-10-15 16:18:43,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 16:18:43,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2020-10-15 16:18:43,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:18:43,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 16:18:43,462 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 16:18:43,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:18:43,462 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 16:18:43,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:18:43,463 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 16:18:43,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:18:43,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:18:43,463 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:18:43,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-15 16:18:43,664 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:18:43,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:18:43,664 INFO L82 PathProgramCache]: Analyzing trace with hash -742319413, now seen corresponding path program 169 times [2020-10-15 16:18:43,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:18:43,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961404181] [2020-10-15 16:18:43,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:18:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:43,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961404181] [2020-10-15 16:18:43,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913191303] [2020-10-15 16:18:43,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:18:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:18:43,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:18:43,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:18:47,077 WARN L860 $PredicateComparison]: unable to prove that (exists ((aux_div_v_~j~0_527_43 Int) (v_~i~0_535 Int) (aux_div_aux_mod_v_~j~0_527_43_92 Int)) (let ((.cse0 (* 2 aux_div_v_~j~0_527_43)) (.cse1 (* 2 aux_div_aux_mod_v_~j~0_527_43_92))) (and (<= (+ .cse0 c_~j~0) (* 2 v_~i~0_535)) (<= c_~j~0 (+ .cse1 v_~i~0_535 2)) (<= aux_div_v_~j~0_527_43 1) (<= v_~i~0_535 (+ .cse0 .cse1 3)) (<= c_~i~0 (+ v_~i~0_535 c_~j~0)) (<= (+ .cse0 .cse1 1) v_~i~0_535) (<= aux_div_aux_mod_v_~j~0_527_43_92 1)))) is different from true [2020-10-15 16:18:47,080 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:18:47,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:18:47,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:18:47,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:18:47,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:18:47,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349406121] [2020-10-15 16:18:47,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:18:47,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:18:47,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:18:47,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=162, Unknown=2, NotChecked=28, Total=272 [2020-10-15 16:18:47,143 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 16:18:47,589 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-15 16:18:51,732 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 16:18:55,786 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-10-15 16:18:59,929 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 16:19:06,739 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-15 16:19:16,495 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2020-10-15 16:19:18,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:18,576 INFO L93 Difference]: Finished difference Result 292 states and 717 transitions. [2020-10-15 16:19:18,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:19:18,577 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:18,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:18,578 INFO L225 Difference]: With dead ends: 292 [2020-10-15 16:19:18,578 INFO L226 Difference]: Without dead ends: 287 [2020-10-15 16:19:18,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=482, Invalid=1069, Unknown=13, NotChecked=76, Total=1640 [2020-10-15 16:19:18,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-15 16:19:18,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 168. [2020-10-15 16:19:18,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-15 16:19:18,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 421 transitions. [2020-10-15 16:19:18,582 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 421 transitions. Word has length 14 [2020-10-15 16:19:18,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:18,582 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 421 transitions. [2020-10-15 16:19:18,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:18,582 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 421 transitions. [2020-10-15 16:19:18,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:18,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:18,583 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:18,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-10-15 16:19:18,783 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:18,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:18,784 INFO L82 PathProgramCache]: Analyzing trace with hash -742318452, now seen corresponding path program 170 times [2020-10-15 16:19:18,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:18,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722947251] [2020-10-15 16:19:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:18,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722947251] [2020-10-15 16:19:18,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799072250] [2020-10-15 16:19:18,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:18,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:19:18,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:18,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:18,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:21,267 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:19:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:21,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:21,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:21,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681572308] [2020-10-15 16:19:21,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:21,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:21,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:21,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-10-15 16:19:21,336 INFO L87 Difference]: Start difference. First operand 168 states and 421 transitions. Second operand 17 states. [2020-10-15 16:19:23,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:23,271 INFO L93 Difference]: Finished difference Result 292 states and 701 transitions. [2020-10-15 16:19:23,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:19:23,274 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:23,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:23,274 INFO L225 Difference]: With dead ends: 292 [2020-10-15 16:19:23,274 INFO L226 Difference]: Without dead ends: 284 [2020-10-15 16:19:23,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=425, Invalid=980, Unknown=1, NotChecked=0, Total=1406 [2020-10-15 16:19:23,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-15 16:19:23,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-10-15 16:19:23,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:19:23,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-15 16:19:23,278 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-15 16:19:23,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:23,278 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-15 16:19:23,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:23,278 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-15 16:19:23,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:23,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:23,279 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:23,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-15 16:19:23,480 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:23,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:23,480 INFO L82 PathProgramCache]: Analyzing trace with hash -742110132, now seen corresponding path program 171 times [2020-10-15 16:19:23,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:23,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166950203] [2020-10-15 16:19:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:23,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166950203] [2020-10-15 16:19:23,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455190838] [2020-10-15 16:19:23,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:23,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:19:23,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:23,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:23,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:23,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:23,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:23,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9751281] [2020-10-15 16:19:23,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:23,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:23,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:23,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:23,973 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-15 16:19:24,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:24,601 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-10-15 16:19:24,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:19:24,603 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:24,604 INFO L225 Difference]: With dead ends: 231 [2020-10-15 16:19:24,604 INFO L226 Difference]: Without dead ends: 229 [2020-10-15 16:19:24,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:19:24,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-15 16:19:24,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-10-15 16:19:24,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:19:24,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-15 16:19:24,607 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-15 16:19:24,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:24,607 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-15 16:19:24,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:24,607 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-15 16:19:24,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:24,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:24,607 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:24,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2020-10-15 16:19:24,808 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:24,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:24,809 INFO L82 PathProgramCache]: Analyzing trace with hash -741447042, now seen corresponding path program 172 times [2020-10-15 16:19:24,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:24,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556279836] [2020-10-15 16:19:24,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:24,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556279836] [2020-10-15 16:19:24,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324462243] [2020-10-15 16:19:24,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:25,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:19:25,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:25,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:25,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:25,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:25,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:25,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298964507] [2020-10-15 16:19:25,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:25,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:25,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:25,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:25,392 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-15 16:19:26,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:26,500 INFO L93 Difference]: Finished difference Result 250 states and 594 transitions. [2020-10-15 16:19:26,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:19:26,501 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:26,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:26,502 INFO L225 Difference]: With dead ends: 250 [2020-10-15 16:19:26,502 INFO L226 Difference]: Without dead ends: 248 [2020-10-15 16:19:26,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:19:26,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-15 16:19:26,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2020-10-15 16:19:26,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:19:26,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 405 transitions. [2020-10-15 16:19:26,506 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 405 transitions. Word has length 14 [2020-10-15 16:19:26,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:26,506 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 405 transitions. [2020-10-15 16:19:26,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:26,506 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 405 transitions. [2020-10-15 16:19:26,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:26,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:26,506 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:26,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:26,707 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:26,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:26,708 INFO L82 PathProgramCache]: Analyzing trace with hash -741424722, now seen corresponding path program 173 times [2020-10-15 16:19:26,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:26,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561232382] [2020-10-15 16:19:26,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:26,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561232382] [2020-10-15 16:19:26,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903004266] [2020-10-15 16:19:26,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:26,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:19:26,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:26,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:26,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:27,194 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:19:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:27,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:27,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:27,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119847652] [2020-10-15 16:19:27,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:27,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:27,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:27,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:27,227 INFO L87 Difference]: Start difference. First operand 163 states and 405 transitions. Second operand 17 states. [2020-10-15 16:19:28,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:28,804 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2020-10-15 16:19:28,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:19:28,806 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:28,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:28,806 INFO L225 Difference]: With dead ends: 288 [2020-10-15 16:19:28,806 INFO L226 Difference]: Without dead ends: 283 [2020-10-15 16:19:28,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:19:28,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-15 16:19:28,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2020-10-15 16:19:28,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 16:19:28,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2020-10-15 16:19:28,811 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 14 [2020-10-15 16:19:28,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:28,811 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2020-10-15 16:19:28,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:28,811 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2020-10-15 16:19:28,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:28,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:28,811 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:29,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-10-15 16:19:29,012 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:29,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:29,013 INFO L82 PathProgramCache]: Analyzing trace with hash -541944403, now seen corresponding path program 174 times [2020-10-15 16:19:29,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:29,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899039945] [2020-10-15 16:19:29,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:29,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899039945] [2020-10-15 16:19:29,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668260703] [2020-10-15 16:19:29,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:29,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:19:29,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:29,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:29,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:29,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:29,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:29,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626358281] [2020-10-15 16:19:29,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:29,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:29,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:29,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:29,451 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand 17 states. [2020-10-15 16:19:30,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:30,054 INFO L93 Difference]: Finished difference Result 236 states and 544 transitions. [2020-10-15 16:19:30,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:19:30,056 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:30,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:30,057 INFO L225 Difference]: With dead ends: 236 [2020-10-15 16:19:30,057 INFO L226 Difference]: Without dead ends: 234 [2020-10-15 16:19:30,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:19:30,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-15 16:19:30,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-10-15 16:19:30,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:19:30,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 16:19:30,060 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 16:19:30,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:30,060 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 16:19:30,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:30,060 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 16:19:30,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:30,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:30,061 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:30,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:30,261 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:30,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:30,262 INFO L82 PathProgramCache]: Analyzing trace with hash -541943442, now seen corresponding path program 175 times [2020-10-15 16:19:30,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:30,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407145368] [2020-10-15 16:19:30,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:30,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407145368] [2020-10-15 16:19:30,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119589475] [2020-10-15 16:19:30,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:30,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:30,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:30,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:30,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:30,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744207674] [2020-10-15 16:19:30,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:30,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:30,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:30,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:30,750 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 16:19:31,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:31,397 INFO L93 Difference]: Finished difference Result 246 states and 565 transitions. [2020-10-15 16:19:31,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:19:31,399 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:31,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:31,399 INFO L225 Difference]: With dead ends: 246 [2020-10-15 16:19:31,400 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 16:19:31,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:19:31,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 16:19:31,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-10-15 16:19:31,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:19:31,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 16:19:31,403 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 16:19:31,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:31,403 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 16:19:31,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:31,404 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 16:19:31,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:31,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:31,404 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:31,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:31,605 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:31,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:31,605 INFO L82 PathProgramCache]: Analyzing trace with hash -541914612, now seen corresponding path program 176 times [2020-10-15 16:19:31,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:31,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144065852] [2020-10-15 16:19:31,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:31,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144065852] [2020-10-15 16:19:31,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785240957] [2020-10-15 16:19:31,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:31,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:19:31,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:31,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:31,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:32,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:32,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:32,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078020574] [2020-10-15 16:19:32,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:32,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:32,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:32,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:32,069 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 16:19:32,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:32,829 INFO L93 Difference]: Finished difference Result 239 states and 554 transitions. [2020-10-15 16:19:32,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:19:32,830 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:32,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:32,831 INFO L225 Difference]: With dead ends: 239 [2020-10-15 16:19:32,831 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 16:19:32,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:19:32,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 16:19:32,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-15 16:19:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:19:32,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 16:19:32,836 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 16:19:32,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:32,836 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 16:19:32,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:32,836 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 16:19:32,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:32,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:32,837 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:33,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:33,046 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:33,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:33,047 INFO L82 PathProgramCache]: Analyzing trace with hash -540990130, now seen corresponding path program 177 times [2020-10-15 16:19:33,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:33,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613961558] [2020-10-15 16:19:33,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:33,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613961558] [2020-10-15 16:19:33,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705446642] [2020-10-15 16:19:33,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:33,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:19:33,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:33,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:33,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:33,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:33,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:33,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628051066] [2020-10-15 16:19:33,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:33,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:33,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:33,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:33,512 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 16:19:33,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:33,993 INFO L93 Difference]: Finished difference Result 229 states and 529 transitions. [2020-10-15 16:19:33,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:19:33,994 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:33,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:33,995 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:19:33,995 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:19:33,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:19:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:19:33,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-15 16:19:33,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 16:19:33,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-15 16:19:33,999 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-15 16:19:33,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:33,999 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-15 16:19:34,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:34,000 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-15 16:19:34,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:34,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:34,000 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:34,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-15 16:19:34,201 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:34,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:34,201 INFO L82 PathProgramCache]: Analyzing trace with hash 95285087, now seen corresponding path program 178 times [2020-10-15 16:19:34,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:34,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96141913] [2020-10-15 16:19:34,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:34,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:34,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96141913] [2020-10-15 16:19:34,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410934959] [2020-10-15 16:19:34,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:34,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:19:34,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:34,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:34,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:34,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:34,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:34,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901668884] [2020-10-15 16:19:34,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:34,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:34,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:34,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:34,629 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-15 16:19:35,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:35,612 INFO L93 Difference]: Finished difference Result 261 states and 599 transitions. [2020-10-15 16:19:35,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:19:35,614 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:35,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:35,615 INFO L225 Difference]: With dead ends: 261 [2020-10-15 16:19:35,615 INFO L226 Difference]: Without dead ends: 259 [2020-10-15 16:19:35,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:19:35,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-15 16:19:35,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 164. [2020-10-15 16:19:35,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:19:35,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2020-10-15 16:19:35,619 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 14 [2020-10-15 16:19:35,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:35,619 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2020-10-15 16:19:35,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:35,619 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2020-10-15 16:19:35,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:35,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:35,620 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:35,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:35,821 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:35,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:35,821 INFO L82 PathProgramCache]: Analyzing trace with hash 95286048, now seen corresponding path program 179 times [2020-10-15 16:19:35,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:35,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057722318] [2020-10-15 16:19:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:35,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057722318] [2020-10-15 16:19:35,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336988682] [2020-10-15 16:19:35,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:36,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:19:36,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:36,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:36,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:36,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:36,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:36,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463180267] [2020-10-15 16:19:36,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:36,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:36,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:36,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:36,256 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand 17 states. [2020-10-15 16:19:37,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:37,204 INFO L93 Difference]: Finished difference Result 271 states and 622 transitions. [2020-10-15 16:19:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:19:37,206 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:37,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:37,206 INFO L225 Difference]: With dead ends: 271 [2020-10-15 16:19:37,207 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 16:19:37,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:19:37,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 16:19:37,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2020-10-15 16:19:37,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:19:37,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2020-10-15 16:19:37,210 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 14 [2020-10-15 16:19:37,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:37,213 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2020-10-15 16:19:37,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:37,213 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2020-10-15 16:19:37,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:37,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:37,214 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:37,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-15 16:19:37,423 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:37,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:37,424 INFO L82 PathProgramCache]: Analyzing trace with hash 95314878, now seen corresponding path program 180 times [2020-10-15 16:19:37,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:37,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967141822] [2020-10-15 16:19:37,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:37,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967141822] [2020-10-15 16:19:37,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481656084] [2020-10-15 16:19:37,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:37,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:19:37,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:37,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:37,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:37,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:37,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:37,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086643554] [2020-10-15 16:19:37,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:37,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:37,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:37,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:37,829 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand 17 states. [2020-10-15 16:19:38,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:38,649 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-10-15 16:19:38,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:19:38,650 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:38,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:38,651 INFO L225 Difference]: With dead ends: 253 [2020-10-15 16:19:38,651 INFO L226 Difference]: Without dead ends: 251 [2020-10-15 16:19:38,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=274, Invalid=718, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:19:38,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-15 16:19:38,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-10-15 16:19:38,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:19:38,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-15 16:19:38,654 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-15 16:19:38,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:38,655 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-15 16:19:38,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:38,655 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-15 16:19:38,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:38,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:38,655 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:38,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-15 16:19:38,856 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:38,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:38,857 INFO L82 PathProgramCache]: Analyzing trace with hash 115840877, now seen corresponding path program 181 times [2020-10-15 16:19:38,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:38,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886497002] [2020-10-15 16:19:38,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:39,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886497002] [2020-10-15 16:19:39,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028672291] [2020-10-15 16:19:39,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:39,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:39,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:39,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:39,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:39,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:39,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600636116] [2020-10-15 16:19:39,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:39,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:39,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:39,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:39,288 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-15 16:19:40,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:40,278 INFO L93 Difference]: Finished difference Result 268 states and 622 transitions. [2020-10-15 16:19:40,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:19:40,280 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:40,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:40,280 INFO L225 Difference]: With dead ends: 268 [2020-10-15 16:19:40,281 INFO L226 Difference]: Without dead ends: 266 [2020-10-15 16:19:40,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:19:40,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-15 16:19:40,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2020-10-15 16:19:40,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:19:40,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 16:19:40,285 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 16:19:40,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:40,285 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 16:19:40,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:40,285 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 16:19:40,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:40,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:40,285 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:40,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:40,486 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:40,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:40,487 INFO L82 PathProgramCache]: Analyzing trace with hash 115841838, now seen corresponding path program 182 times [2020-10-15 16:19:40,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:40,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848643313] [2020-10-15 16:19:40,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:40,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848643313] [2020-10-15 16:19:40,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313419472] [2020-10-15 16:19:40,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:40,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:19:40,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:40,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:40,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:40,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:40,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:40,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209041721] [2020-10-15 16:19:40,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:40,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:40,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:40,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:40,965 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 16:19:42,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:42,039 INFO L93 Difference]: Finished difference Result 271 states and 630 transitions. [2020-10-15 16:19:42,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 16:19:42,040 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:42,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:42,041 INFO L225 Difference]: With dead ends: 271 [2020-10-15 16:19:42,041 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 16:19:42,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:19:42,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 16:19:42,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-15 16:19:42,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:19:42,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-15 16:19:42,050 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-15 16:19:42,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:42,050 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-15 16:19:42,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:42,050 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-15 16:19:42,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:42,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:42,051 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:42,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-15 16:19:42,251 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:42,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:42,252 INFO L82 PathProgramCache]: Analyzing trace with hash 116503967, now seen corresponding path program 183 times [2020-10-15 16:19:42,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:42,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350783998] [2020-10-15 16:19:42,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:42,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350783998] [2020-10-15 16:19:42,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601388033] [2020-10-15 16:19:42,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:42,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:19:42,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:42,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 16:19:42,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:42,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:42,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-10-15 16:19:42,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772030632] [2020-10-15 16:19:42,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 16:19:42,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:42,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 16:19:42,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-10-15 16:19:42,618 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 16 states. [2020-10-15 16:19:43,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:43,580 INFO L93 Difference]: Finished difference Result 249 states and 587 transitions. [2020-10-15 16:19:43,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:19:43,582 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-10-15 16:19:43,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:43,582 INFO L225 Difference]: With dead ends: 249 [2020-10-15 16:19:43,582 INFO L226 Difference]: Without dead ends: 247 [2020-10-15 16:19:43,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=282, Invalid=710, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:19:43,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-15 16:19:43,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 171. [2020-10-15 16:19:43,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 16:19:43,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 16:19:43,585 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 16:19:43,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:43,586 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 16:19:43,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 16:19:43,586 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 16:19:43,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:43,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:43,586 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:43,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2020-10-15 16:19:43,787 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:43,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:43,787 INFO L82 PathProgramCache]: Analyzing trace with hash 116525326, now seen corresponding path program 184 times [2020-10-15 16:19:43,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:43,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631299277] [2020-10-15 16:19:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:43,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631299277] [2020-10-15 16:19:43,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264601715] [2020-10-15 16:19:43,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:43,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:19:43,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:43,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:43,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:44,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:19:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:44,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:44,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:44,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731792643] [2020-10-15 16:19:44,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:44,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:44,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:44,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:44,203 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 16:19:45,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:45,184 INFO L93 Difference]: Finished difference Result 248 states and 600 transitions. [2020-10-15 16:19:45,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:19:45,185 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:45,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:45,185 INFO L225 Difference]: With dead ends: 248 [2020-10-15 16:19:45,186 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 16:19:45,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:19:45,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 16:19:45,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2020-10-15 16:19:45,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 16:19:45,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 16:19:45,190 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 16:19:45,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:45,190 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 16:19:45,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:45,190 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 16:19:45,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:45,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:45,190 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:45,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:45,391 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:45,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:45,392 INFO L82 PathProgramCache]: Analyzing trace with hash 116526287, now seen corresponding path program 185 times [2020-10-15 16:19:45,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:45,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518386681] [2020-10-15 16:19:45,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:45,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518386681] [2020-10-15 16:19:45,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109243169] [2020-10-15 16:19:45,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:45,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:19:45,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:45,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:45,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:45,932 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:19:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:46,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:46,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:46,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234678999] [2020-10-15 16:19:46,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:46,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:46,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:46,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:46,001 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 16:19:47,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:47,419 INFO L93 Difference]: Finished difference Result 287 states and 694 transitions. [2020-10-15 16:19:47,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:19:47,420 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:47,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:47,420 INFO L225 Difference]: With dead ends: 287 [2020-10-15 16:19:47,421 INFO L226 Difference]: Without dead ends: 282 [2020-10-15 16:19:47,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:19:47,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-15 16:19:47,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2020-10-15 16:19:47,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:19:47,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-15 16:19:47,424 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-15 16:19:47,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:47,425 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-15 16:19:47,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:47,425 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-15 16:19:47,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:47,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:47,425 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:47,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:47,626 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:47,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:47,627 INFO L82 PathProgramCache]: Analyzing trace with hash 116533758, now seen corresponding path program 186 times [2020-10-15 16:19:47,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:47,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161874323] [2020-10-15 16:19:47,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:47,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161874323] [2020-10-15 16:19:47,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108393571] [2020-10-15 16:19:47,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:47,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 16:19:47,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:47,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:47,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:48,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:48,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:48,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911791206] [2020-10-15 16:19:48,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:48,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:48,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:48,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:48,078 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-15 16:19:49,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:49,248 INFO L93 Difference]: Finished difference Result 284 states and 678 transitions. [2020-10-15 16:19:49,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:19:49,249 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:49,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:49,250 INFO L225 Difference]: With dead ends: 284 [2020-10-15 16:19:49,250 INFO L226 Difference]: Without dead ends: 282 [2020-10-15 16:19:49,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 16:19:49,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-15 16:19:49,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 171. [2020-10-15 16:19:49,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 16:19:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 16:19:49,253 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 16:19:49,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:49,253 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 16:19:49,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:49,253 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 16:19:49,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:49,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:49,254 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:49,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:49,454 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:49,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:49,455 INFO L82 PathProgramCache]: Analyzing trace with hash 116555117, now seen corresponding path program 187 times [2020-10-15 16:19:49,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:49,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675969687] [2020-10-15 16:19:49,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:49,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675969687] [2020-10-15 16:19:49,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138602890] [2020-10-15 16:19:49,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:49,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:49,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:49,900 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:19:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:49,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:49,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:49,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014927649] [2020-10-15 16:19:49,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:49,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:49,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:49,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:49,964 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 16:19:51,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:51,381 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-10-15 16:19:51,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:19:51,383 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:51,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:51,384 INFO L225 Difference]: With dead ends: 289 [2020-10-15 16:19:51,384 INFO L226 Difference]: Without dead ends: 284 [2020-10-15 16:19:51,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:19:51,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-15 16:19:51,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 172. [2020-10-15 16:19:51,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-15 16:19:51,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-10-15 16:19:51,388 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-10-15 16:19:51,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:51,388 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-10-15 16:19:51,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:51,388 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-10-15 16:19:51,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:51,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:51,388 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:51,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:51,589 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:51,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:51,589 INFO L82 PathProgramCache]: Analyzing trace with hash 116556078, now seen corresponding path program 188 times [2020-10-15 16:19:51,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:51,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574611208] [2020-10-15 16:19:51,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:51,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574611208] [2020-10-15 16:19:51,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882519850] [2020-10-15 16:19:51,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:51,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:19:51,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:51,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:51,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:51,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:19:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:51,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:51,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:51,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765564695] [2020-10-15 16:19:51,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:51,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:51,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:51,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:51,992 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-10-15 16:19:53,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:53,737 INFO L93 Difference]: Finished difference Result 312 states and 753 transitions. [2020-10-15 16:19:53,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:19:53,739 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:53,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:53,740 INFO L225 Difference]: With dead ends: 312 [2020-10-15 16:19:53,740 INFO L226 Difference]: Without dead ends: 304 [2020-10-15 16:19:53,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:19:53,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-15 16:19:53,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 165. [2020-10-15 16:19:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:19:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-15 16:19:53,744 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-15 16:19:53,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:53,745 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-15 16:19:53,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:53,745 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-15 16:19:53,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:53,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:53,745 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:53,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:53,946 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:53,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:53,946 INFO L82 PathProgramCache]: Analyzing trace with hash 116764398, now seen corresponding path program 189 times [2020-10-15 16:19:53,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:53,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892620814] [2020-10-15 16:19:53,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:54,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892620814] [2020-10-15 16:19:54,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383219241] [2020-10-15 16:19:54,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:54,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:19:54,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:54,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:54,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:54,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:54,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:54,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771819904] [2020-10-15 16:19:54,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:54,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:54,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:54,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:54,430 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-15 16:19:55,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:55,502 INFO L93 Difference]: Finished difference Result 262 states and 617 transitions. [2020-10-15 16:19:55,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:19:55,504 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:55,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:55,504 INFO L225 Difference]: With dead ends: 262 [2020-10-15 16:19:55,505 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 16:19:55,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:19:55,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 16:19:55,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 167. [2020-10-15 16:19:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:19:55,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 16:19:55,508 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 16:19:55,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:55,509 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 16:19:55,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:55,509 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 16:19:55,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:55,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:55,509 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:55,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-15 16:19:55,719 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:55,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:55,719 INFO L82 PathProgramCache]: Analyzing trace with hash 117427488, now seen corresponding path program 190 times [2020-10-15 16:19:55,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:55,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307832864] [2020-10-15 16:19:55,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:55,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307832864] [2020-10-15 16:19:55,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290389620] [2020-10-15 16:19:55,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:55,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:19:55,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:55,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:55,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:56,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:56,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:56,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750057000] [2020-10-15 16:19:56,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:56,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:56,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:56,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:56,244 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 16:19:57,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:57,498 INFO L93 Difference]: Finished difference Result 271 states and 650 transitions. [2020-10-15 16:19:57,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:19:57,500 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:57,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:57,501 INFO L225 Difference]: With dead ends: 271 [2020-10-15 16:19:57,501 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 16:19:57,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:19:57,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 16:19:57,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-15 16:19:57,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:19:57,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 16:19:57,505 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 16:19:57,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:57,505 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 16:19:57,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:57,505 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 16:19:57,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:57,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:57,505 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:57,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-15 16:19:57,706 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:57,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:57,707 INFO L82 PathProgramCache]: Analyzing trace with hash 117448847, now seen corresponding path program 191 times [2020-10-15 16:19:57,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:57,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300606886] [2020-10-15 16:19:57,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:57,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:57,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300606886] [2020-10-15 16:19:57,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677506061] [2020-10-15 16:19:57,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:57,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:19:57,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:57,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:57,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:19:58,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:19:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:58,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:19:58,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:19:58,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704505780] [2020-10-15 16:19:58,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:19:58,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:19:58,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:19:58,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:19:58,116 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 16:19:59,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:19:59,455 INFO L93 Difference]: Finished difference Result 296 states and 714 transitions. [2020-10-15 16:19:59,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:19:59,457 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:19:59,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:19:59,458 INFO L225 Difference]: With dead ends: 296 [2020-10-15 16:19:59,458 INFO L226 Difference]: Without dead ends: 288 [2020-10-15 16:19:59,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:19:59,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-15 16:19:59,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 171. [2020-10-15 16:19:59,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 16:19:59,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-10-15 16:19:59,461 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-10-15 16:19:59,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:19:59,461 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-10-15 16:19:59,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:19:59,461 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-10-15 16:19:59,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:19:59,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:19:59,462 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:19:59,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-10-15 16:19:59,663 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:19:59,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:19:59,663 INFO L82 PathProgramCache]: Analyzing trace with hash 117449808, now seen corresponding path program 192 times [2020-10-15 16:19:59,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:19:59,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158577640] [2020-10-15 16:19:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:19:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:19:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:19:59,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158577640] [2020-10-15 16:19:59,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828861913] [2020-10-15 16:19:59,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:19:59,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:19:59,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:19:59,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:19:59,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:00,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:20:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:00,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:00,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:00,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730443063] [2020-10-15 16:20:00,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:00,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:00,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:00,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:00,079 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-10-15 16:20:01,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:01,331 INFO L93 Difference]: Finished difference Result 298 states and 732 transitions. [2020-10-15 16:20:01,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:20:01,332 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:01,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:01,333 INFO L225 Difference]: With dead ends: 298 [2020-10-15 16:20:01,333 INFO L226 Difference]: Without dead ends: 290 [2020-10-15 16:20:01,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:20:01,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-15 16:20:01,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-10-15 16:20:01,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:20:01,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-10-15 16:20:01,337 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 14 [2020-10-15 16:20:01,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:01,338 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-10-15 16:20:01,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:01,338 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-10-15 16:20:01,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:01,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:01,338 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:01,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-15 16:20:01,539 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:01,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:01,539 INFO L82 PathProgramCache]: Analyzing trace with hash 117478638, now seen corresponding path program 193 times [2020-10-15 16:20:01,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:01,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059115265] [2020-10-15 16:20:01,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:01,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059115265] [2020-10-15 16:20:01,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039066280] [2020-10-15 16:20:01,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:01,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:01,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:01,961 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:20:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:01,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:01,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:01,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554246541] [2020-10-15 16:20:01,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:01,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:01,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:01,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:01,995 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand 17 states. [2020-10-15 16:20:03,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:03,375 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2020-10-15 16:20:03,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:20:03,377 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:03,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:03,378 INFO L225 Difference]: With dead ends: 291 [2020-10-15 16:20:03,378 INFO L226 Difference]: Without dead ends: 283 [2020-10-15 16:20:03,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:20:03,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-15 16:20:03,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 167. [2020-10-15 16:20:03,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:20:03,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 16:20:03,382 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 16:20:03,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:03,386 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 16:20:03,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:03,386 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 16:20:03,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:03,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:03,387 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:03,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2020-10-15 16:20:03,588 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:03,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:03,588 INFO L82 PathProgramCache]: Analyzing trace with hash 144470028, now seen corresponding path program 194 times [2020-10-15 16:20:03,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:03,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800569572] [2020-10-15 16:20:03,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:03,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800569572] [2020-10-15 16:20:03,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834301208] [2020-10-15 16:20:03,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:03,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:20:03,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:03,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:03,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:04,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:04,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:04,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126185372] [2020-10-15 16:20:04,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:04,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:04,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:04,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:04,084 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 16:20:05,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:05,225 INFO L93 Difference]: Finished difference Result 265 states and 622 transitions. [2020-10-15 16:20:05,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:20:05,226 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:05,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:05,226 INFO L225 Difference]: With dead ends: 265 [2020-10-15 16:20:05,227 INFO L226 Difference]: Without dead ends: 263 [2020-10-15 16:20:05,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:20:05,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-15 16:20:05,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 167. [2020-10-15 16:20:05,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:20:05,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 16:20:05,230 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 16:20:05,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:05,230 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 16:20:05,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:05,231 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 16:20:05,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:05,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:05,231 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:05,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:05,432 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:05,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:05,432 INFO L82 PathProgramCache]: Analyzing trace with hash 145133118, now seen corresponding path program 195 times [2020-10-15 16:20:05,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:05,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549700005] [2020-10-15 16:20:05,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:05,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549700005] [2020-10-15 16:20:05,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269960961] [2020-10-15 16:20:05,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:05,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:20:05,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:05,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:20:05,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:05,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:05,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:05,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865785011] [2020-10-15 16:20:05,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:05,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:05,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:05,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:05,946 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 16:20:07,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:07,330 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-10-15 16:20:07,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:20:07,331 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:07,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:07,332 INFO L225 Difference]: With dead ends: 262 [2020-10-15 16:20:07,332 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 16:20:07,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:20:07,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 16:20:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2020-10-15 16:20:07,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:20:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 16:20:07,337 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 16:20:07,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:07,337 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 16:20:07,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:07,337 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 16:20:07,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:07,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:07,337 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:07,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-10-15 16:20:07,538 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:07,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:07,539 INFO L82 PathProgramCache]: Analyzing trace with hash 145155438, now seen corresponding path program 196 times [2020-10-15 16:20:07,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:07,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771981605] [2020-10-15 16:20:07,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:07,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771981605] [2020-10-15 16:20:07,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010478020] [2020-10-15 16:20:07,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:07,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:20:07,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:07,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:07,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:07,978 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:20:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:08,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:08,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:20:08,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348439596] [2020-10-15 16:20:08,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:20:08,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:08,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:20:08,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:20:08,009 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 16:20:10,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:20:10,096 INFO L93 Difference]: Finished difference Result 285 states and 688 transitions. [2020-10-15 16:20:10,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:20:10,098 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:20:10,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:20:10,098 INFO L225 Difference]: With dead ends: 285 [2020-10-15 16:20:10,099 INFO L226 Difference]: Without dead ends: 280 [2020-10-15 16:20:10,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:20:10,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-15 16:20:10,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 167. [2020-10-15 16:20:10,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:20:10,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 16:20:10,102 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 16:20:10,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:20:10,102 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 16:20:10,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:20:10,102 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 16:20:10,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:20:10,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:20:10,103 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:20:10,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:10,303 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:20:10,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:20:10,304 INFO L82 PathProgramCache]: Analyzing trace with hash 145184268, now seen corresponding path program 197 times [2020-10-15 16:20:10,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:20:10,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822434519] [2020-10-15 16:20:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:20:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:20:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:10,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822434519] [2020-10-15 16:20:10,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024148169] [2020-10-15 16:20:10,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:20:10,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:20:10,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:20:10,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:20:10,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:20:14,916 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:20:18,932 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-10-15 16:20:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:20:18,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:20:18,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 16:20:18,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914612206] [2020-10-15 16:20:18,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:20:18,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:20:18,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:20:18,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2020-10-15 16:20:18,935 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 18 states. [2020-10-15 16:20:23,129 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-15 16:20:27,724 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-15 16:20:31,905 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2020-10-15 16:20:36,362 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-15 16:20:38,579 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-15 16:20:47,396 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-15 16:20:49,787 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-10-15 16:21:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:30,619 INFO L93 Difference]: Finished difference Result 302 states and 718 transitions. [2020-10-15 16:21:30,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:21:30,621 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 16:21:30,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:30,622 INFO L225 Difference]: With dead ends: 302 [2020-10-15 16:21:30,622 INFO L226 Difference]: Without dead ends: 297 [2020-10-15 16:21:30,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 43.2s TimeCoverageRelationStatistics Valid=565, Invalid=1408, Unknown=7, NotChecked=0, Total=1980 [2020-10-15 16:21:30,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-15 16:21:30,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 166. [2020-10-15 16:21:30,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:21:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 414 transitions. [2020-10-15 16:21:30,626 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 414 transitions. Word has length 14 [2020-10-15 16:21:30,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:30,626 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 414 transitions. [2020-10-15 16:21:30,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:21:30,626 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 414 transitions. [2020-10-15 16:21:30,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:30,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:30,627 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:30,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:30,827 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:30,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:30,828 INFO L82 PathProgramCache]: Analyzing trace with hash 146086430, now seen corresponding path program 198 times [2020-10-15 16:21:30,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:30,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357644750] [2020-10-15 16:21:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:30,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357644750] [2020-10-15 16:21:30,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854567396] [2020-10-15 16:21:30,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:31,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:21:31,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:31,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:31,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:31,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:31,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:31,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116318938] [2020-10-15 16:21:31,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:31,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:31,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:31,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:31,299 INFO L87 Difference]: Start difference. First operand 166 states and 414 transitions. Second operand 17 states. [2020-10-15 16:21:31,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:31,831 INFO L93 Difference]: Finished difference Result 219 states and 516 transitions. [2020-10-15 16:21:31,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:21:31,833 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:31,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:31,833 INFO L225 Difference]: With dead ends: 219 [2020-10-15 16:21:31,833 INFO L226 Difference]: Without dead ends: 217 [2020-10-15 16:21:31,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:21:31,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-15 16:21:31,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-10-15 16:21:31,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:21:31,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 16:21:31,837 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 16:21:31,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:31,837 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 16:21:31,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:31,837 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 16:21:31,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:31,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:31,838 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:32,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:32,039 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:32,039 INFO L82 PathProgramCache]: Analyzing trace with hash 146108750, now seen corresponding path program 199 times [2020-10-15 16:21:32,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:32,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913401949] [2020-10-15 16:21:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:32,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913401949] [2020-10-15 16:21:32,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535338471] [2020-10-15 16:21:32,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:32,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:32,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:32,506 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:21:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:32,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:32,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:32,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844344804] [2020-10-15 16:21:32,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:32,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:32,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:32,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:32,532 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 16:21:33,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:33,189 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2020-10-15 16:21:33,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:21:33,194 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:33,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:33,195 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:21:33,195 INFO L226 Difference]: Without dead ends: 224 [2020-10-15 16:21:33,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:21:33,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-15 16:21:33,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 158. [2020-10-15 16:21:33,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 16:21:33,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 386 transitions. [2020-10-15 16:21:33,198 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 386 transitions. Word has length 14 [2020-10-15 16:21:33,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:33,198 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 386 transitions. [2020-10-15 16:21:33,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:33,199 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 386 transitions. [2020-10-15 16:21:33,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:33,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:33,199 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:33,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-15 16:21:33,400 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:33,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:33,400 INFO L82 PathProgramCache]: Analyzing trace with hash 2034084541, now seen corresponding path program 200 times [2020-10-15 16:21:33,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:33,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632691130] [2020-10-15 16:21:33,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:33,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:33,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632691130] [2020-10-15 16:21:33,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242900988] [2020-10-15 16:21:33,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:33,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:21:33,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:33,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:33,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:33,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:33,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:33,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338309910] [2020-10-15 16:21:33,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:33,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:33,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:33,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:33,828 INFO L87 Difference]: Start difference. First operand 158 states and 386 transitions. Second operand 17 states. [2020-10-15 16:21:34,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:34,338 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-15 16:21:34,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:21:34,340 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:34,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:34,341 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:21:34,341 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:21:34,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:21:34,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:21:34,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-15 16:21:34,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 16:21:34,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-15 16:21:34,344 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-15 16:21:34,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:34,344 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-15 16:21:34,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:34,345 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-15 16:21:34,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:34,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:34,345 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:34,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-15 16:21:34,546 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:34,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:34,546 INFO L82 PathProgramCache]: Analyzing trace with hash 2034085502, now seen corresponding path program 201 times [2020-10-15 16:21:34,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:34,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841401534] [2020-10-15 16:21:34,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:34,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841401534] [2020-10-15 16:21:34,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187508179] [2020-10-15 16:21:34,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:34,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:21:34,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:34,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:34,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:34,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:34,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:34,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718150943] [2020-10-15 16:21:34,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:34,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:34,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:34,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:34,996 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-15 16:21:35,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:35,522 INFO L93 Difference]: Finished difference Result 237 states and 545 transitions. [2020-10-15 16:21:35,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:21:35,524 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:35,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:35,524 INFO L225 Difference]: With dead ends: 237 [2020-10-15 16:21:35,524 INFO L226 Difference]: Without dead ends: 235 [2020-10-15 16:21:35,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:21:35,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-15 16:21:35,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 160. [2020-10-15 16:21:35,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:21:35,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 392 transitions. [2020-10-15 16:21:35,528 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 392 transitions. Word has length 14 [2020-10-15 16:21:35,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:35,528 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 392 transitions. [2020-10-15 16:21:35,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:35,528 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 392 transitions. [2020-10-15 16:21:35,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:35,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:35,528 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:35,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-15 16:21:35,731 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:35,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:35,731 INFO L82 PathProgramCache]: Analyzing trace with hash 2034114332, now seen corresponding path program 202 times [2020-10-15 16:21:35,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:35,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994754858] [2020-10-15 16:21:35,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:35,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994754858] [2020-10-15 16:21:35,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380045635] [2020-10-15 16:21:35,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:35,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:21:35,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:35,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:35,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:37,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:37,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:37,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196052846] [2020-10-15 16:21:37,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:37,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:37,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:37,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:37,645 INFO L87 Difference]: Start difference. First operand 160 states and 392 transitions. Second operand 17 states. [2020-10-15 16:21:38,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:38,466 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-15 16:21:38,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:21:38,468 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:38,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:38,469 INFO L225 Difference]: With dead ends: 246 [2020-10-15 16:21:38,469 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 16:21:38,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:21:38,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 16:21:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 164. [2020-10-15 16:21:38,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:21:38,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 403 transitions. [2020-10-15 16:21:38,473 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 403 transitions. Word has length 14 [2020-10-15 16:21:38,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:38,474 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 403 transitions. [2020-10-15 16:21:38,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:38,474 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 403 transitions. [2020-10-15 16:21:38,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:38,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:38,474 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:38,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-15 16:21:38,675 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:38,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:38,676 INFO L82 PathProgramCache]: Analyzing trace with hash 2035009023, now seen corresponding path program 203 times [2020-10-15 16:21:38,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:38,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437235053] [2020-10-15 16:21:38,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:38,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437235053] [2020-10-15 16:21:38,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619058974] [2020-10-15 16:21:38,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:38,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:21:38,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:38,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:38,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:39,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:39,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:39,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440785390] [2020-10-15 16:21:39,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:39,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:39,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:39,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:39,168 INFO L87 Difference]: Start difference. First operand 164 states and 403 transitions. Second operand 17 states. [2020-10-15 16:21:39,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:39,727 INFO L93 Difference]: Finished difference Result 245 states and 560 transitions. [2020-10-15 16:21:39,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:21:39,728 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:39,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:39,729 INFO L225 Difference]: With dead ends: 245 [2020-10-15 16:21:39,729 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 16:21:39,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:21:39,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 16:21:39,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 163. [2020-10-15 16:21:39,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:21:39,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 399 transitions. [2020-10-15 16:21:39,733 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 399 transitions. Word has length 14 [2020-10-15 16:21:39,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:39,733 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 399 transitions. [2020-10-15 16:21:39,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:39,733 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 399 transitions. [2020-10-15 16:21:39,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:39,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:39,734 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:39,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-15 16:21:39,934 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:39,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:39,935 INFO L82 PathProgramCache]: Analyzing trace with hash 2062713692, now seen corresponding path program 204 times [2020-10-15 16:21:39,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:39,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129617746] [2020-10-15 16:21:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:40,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129617746] [2020-10-15 16:21:40,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175547082] [2020-10-15 16:21:40,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:40,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:21:40,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:40,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:40,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:40,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:40,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:40,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333716549] [2020-10-15 16:21:40,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:40,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:40,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:40,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:40,458 INFO L87 Difference]: Start difference. First operand 163 states and 399 transitions. Second operand 17 states. [2020-10-15 16:21:41,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:41,034 INFO L93 Difference]: Finished difference Result 239 states and 549 transitions. [2020-10-15 16:21:41,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:21:41,036 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:41,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:41,036 INFO L225 Difference]: With dead ends: 239 [2020-10-15 16:21:41,037 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 16:21:41,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:21:41,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 16:21:41,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2020-10-15 16:21:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:21:41,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2020-10-15 16:21:41,040 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 14 [2020-10-15 16:21:41,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:41,040 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2020-10-15 16:21:41,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:41,040 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2020-10-15 16:21:41,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:41,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:41,040 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:41,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-10-15 16:21:41,241 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:41,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:41,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2063667004, now seen corresponding path program 205 times [2020-10-15 16:21:41,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:41,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409219660] [2020-10-15 16:21:41,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:41,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409219660] [2020-10-15 16:21:41,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649899367] [2020-10-15 16:21:41,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:41,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:41,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:41,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:41,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:41,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699006529] [2020-10-15 16:21:41,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:41,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:41,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:41,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:41,757 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand 17 states. [2020-10-15 16:21:42,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:42,115 INFO L93 Difference]: Finished difference Result 220 states and 508 transitions. [2020-10-15 16:21:42,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:21:42,117 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:42,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:42,117 INFO L225 Difference]: With dead ends: 220 [2020-10-15 16:21:42,118 INFO L226 Difference]: Without dead ends: 218 [2020-10-15 16:21:42,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 16:21:42,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-15 16:21:42,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 156. [2020-10-15 16:21:42,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 16:21:42,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-10-15 16:21:42,121 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 14 [2020-10-15 16:21:42,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:42,121 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-10-15 16:21:42,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:42,121 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-10-15 16:21:42,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:42,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:42,122 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:42,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-15 16:21:42,322 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:42,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:42,323 INFO L82 PathProgramCache]: Analyzing trace with hash 313362251, now seen corresponding path program 206 times [2020-10-15 16:21:42,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:42,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470271147] [2020-10-15 16:21:42,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:42,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470271147] [2020-10-15 16:21:42,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212867358] [2020-10-15 16:21:42,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:42,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:21:42,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:42,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:42,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:42,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:42,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:42,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260626182] [2020-10-15 16:21:42,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:42,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:42,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:42,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:42,863 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 17 states. [2020-10-15 16:21:43,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:43,423 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-15 16:21:43,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:21:43,424 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:43,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:43,425 INFO L225 Difference]: With dead ends: 229 [2020-10-15 16:21:43,425 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:21:43,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:21:43,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:21:43,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-15 16:21:43,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 16:21:43,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2020-10-15 16:21:43,428 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 14 [2020-10-15 16:21:43,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:43,428 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2020-10-15 16:21:43,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2020-10-15 16:21:43,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:43,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:43,429 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:43,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2020-10-15 16:21:43,629 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:43,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:43,630 INFO L82 PathProgramCache]: Analyzing trace with hash 313363212, now seen corresponding path program 207 times [2020-10-15 16:21:43,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:43,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769741809] [2020-10-15 16:21:43,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:43,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769741809] [2020-10-15 16:21:43,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442067525] [2020-10-15 16:21:43,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:43,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:21:43,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:43,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:43,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:44,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:44,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:44,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260169886] [2020-10-15 16:21:44,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:44,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:44,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:44,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:44,134 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand 17 states. [2020-10-15 16:21:44,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:44,767 INFO L93 Difference]: Finished difference Result 233 states and 536 transitions. [2020-10-15 16:21:44,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:21:44,770 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:44,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:44,771 INFO L225 Difference]: With dead ends: 233 [2020-10-15 16:21:44,771 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 16:21:44,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:21:44,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 16:21:44,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 159. [2020-10-15 16:21:44,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 16:21:44,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2020-10-15 16:21:44,774 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 14 [2020-10-15 16:21:44,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:44,774 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2020-10-15 16:21:44,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:44,774 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2020-10-15 16:21:44,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:44,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:44,775 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:44,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:44,976 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:44,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:44,976 INFO L82 PathProgramCache]: Analyzing trace with hash 313392042, now seen corresponding path program 208 times [2020-10-15 16:21:44,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:44,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103729900] [2020-10-15 16:21:44,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:45,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103729900] [2020-10-15 16:21:45,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557941642] [2020-10-15 16:21:45,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:45,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:21:45,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:45,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:45,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:45,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:45,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:45,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988786565] [2020-10-15 16:21:45,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:45,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:45,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:45,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:45,632 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand 17 states. [2020-10-15 16:21:46,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:46,595 INFO L93 Difference]: Finished difference Result 256 states and 582 transitions. [2020-10-15 16:21:46,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:21:46,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:46,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:46,597 INFO L225 Difference]: With dead ends: 256 [2020-10-15 16:21:46,597 INFO L226 Difference]: Without dead ends: 254 [2020-10-15 16:21:46,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:21:46,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-15 16:21:46,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 163. [2020-10-15 16:21:46,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 16:21:46,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 403 transitions. [2020-10-15 16:21:46,606 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 403 transitions. Word has length 14 [2020-10-15 16:21:46,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:46,606 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 403 transitions. [2020-10-15 16:21:46,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:46,606 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 403 transitions. [2020-10-15 16:21:46,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:46,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:46,607 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:46,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:46,807 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:46,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:46,808 INFO L82 PathProgramCache]: Analyzing trace with hash 314286733, now seen corresponding path program 209 times [2020-10-15 16:21:46,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:46,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104409817] [2020-10-15 16:21:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:46,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104409817] [2020-10-15 16:21:46,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022422833] [2020-10-15 16:21:46,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:47,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:21:47,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:47,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:47,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:47,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:47,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:47,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842836179] [2020-10-15 16:21:47,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:47,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:47,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:47,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:47,281 INFO L87 Difference]: Start difference. First operand 163 states and 403 transitions. Second operand 17 states. [2020-10-15 16:21:47,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:47,933 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-15 16:21:47,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:21:47,935 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:47,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:47,935 INFO L225 Difference]: With dead ends: 246 [2020-10-15 16:21:47,936 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 16:21:47,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:21:47,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 16:21:47,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 162. [2020-10-15 16:21:47,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 16:21:47,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-10-15 16:21:47,939 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 14 [2020-10-15 16:21:47,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:47,939 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-10-15 16:21:47,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:47,939 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-10-15 16:21:47,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:47,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:47,939 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:48,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:48,140 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:48,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:48,141 INFO L82 PathProgramCache]: Analyzing trace with hash 950591741, now seen corresponding path program 210 times [2020-10-15 16:21:48,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:48,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621127540] [2020-10-15 16:21:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:48,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621127540] [2020-10-15 16:21:48,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082171580] [2020-10-15 16:21:48,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:48,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:21:48,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:48,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:48,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:48,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:48,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:48,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385414800] [2020-10-15 16:21:48,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:48,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:48,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:48,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:48,620 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 17 states. [2020-10-15 16:21:49,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:49,337 INFO L93 Difference]: Finished difference Result 250 states and 575 transitions. [2020-10-15 16:21:49,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:21:49,338 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:49,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:49,339 INFO L225 Difference]: With dead ends: 250 [2020-10-15 16:21:49,339 INFO L226 Difference]: Without dead ends: 248 [2020-10-15 16:21:49,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:21:49,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-15 16:21:49,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 164. [2020-10-15 16:21:49,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:21:49,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-15 16:21:49,342 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-15 16:21:49,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:49,343 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-15 16:21:49,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:49,343 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-15 16:21:49,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:49,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:49,343 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:49,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-15 16:21:49,544 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:49,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:49,544 INFO L82 PathProgramCache]: Analyzing trace with hash 950592702, now seen corresponding path program 211 times [2020-10-15 16:21:49,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:49,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493692719] [2020-10-15 16:21:49,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:49,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493692719] [2020-10-15 16:21:49,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563922786] [2020-10-15 16:21:49,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:49,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:49,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:50,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:50,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:50,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228054958] [2020-10-15 16:21:50,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:50,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:50,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:50,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:50,025 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-15 16:21:50,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:50,741 INFO L93 Difference]: Finished difference Result 245 states and 564 transitions. [2020-10-15 16:21:50,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 16:21:50,743 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:50,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:50,744 INFO L225 Difference]: With dead ends: 245 [2020-10-15 16:21:50,744 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 16:21:50,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:21:50,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 16:21:50,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 164. [2020-10-15 16:21:50,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:21:50,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-15 16:21:50,748 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-15 16:21:50,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:50,748 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-15 16:21:50,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:50,748 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-15 16:21:50,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:50,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:50,749 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:50,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:50,949 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:50,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:50,950 INFO L82 PathProgramCache]: Analyzing trace with hash 950621532, now seen corresponding path program 212 times [2020-10-15 16:21:50,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:50,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022290219] [2020-10-15 16:21:50,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:51,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022290219] [2020-10-15 16:21:51,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560315289] [2020-10-15 16:21:51,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:51,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:21:51,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:51,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:51,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:51,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:51,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:51,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070413673] [2020-10-15 16:21:51,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:51,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:51,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:51,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:51,562 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-15 16:21:52,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:52,671 INFO L93 Difference]: Finished difference Result 262 states and 602 transitions. [2020-10-15 16:21:52,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:21:52,673 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:52,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:52,674 INFO L225 Difference]: With dead ends: 262 [2020-10-15 16:21:52,674 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 16:21:52,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:21:52,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 16:21:52,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 165. [2020-10-15 16:21:52,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:21:52,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-15 16:21:52,678 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-15 16:21:52,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:52,679 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-15 16:21:52,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:52,679 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-15 16:21:52,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:52,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:52,679 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:52,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-15 16:21:52,886 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:52,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:52,887 INFO L82 PathProgramCache]: Analyzing trace with hash 971147531, now seen corresponding path program 213 times [2020-10-15 16:21:52,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:52,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972490277] [2020-10-15 16:21:52,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:53,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972490277] [2020-10-15 16:21:53,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683640273] [2020-10-15 16:21:53,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:53,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:21:53,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:53,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:53,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:53,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:53,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:53,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056595042] [2020-10-15 16:21:53,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:53,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:53,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:53,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:53,456 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-15 16:21:54,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:54,363 INFO L93 Difference]: Finished difference Result 254 states and 594 transitions. [2020-10-15 16:21:54,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:21:54,365 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:54,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:54,365 INFO L225 Difference]: With dead ends: 254 [2020-10-15 16:21:54,365 INFO L226 Difference]: Without dead ends: 252 [2020-10-15 16:21:54,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:21:54,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-15 16:21:54,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 166. [2020-10-15 16:21:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:21:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 416 transitions. [2020-10-15 16:21:54,369 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 416 transitions. Word has length 14 [2020-10-15 16:21:54,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:54,369 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 416 transitions. [2020-10-15 16:21:54,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:54,369 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 416 transitions. [2020-10-15 16:21:54,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:54,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:54,370 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:54,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-15 16:21:54,571 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:54,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:54,571 INFO L82 PathProgramCache]: Analyzing trace with hash 971148492, now seen corresponding path program 214 times [2020-10-15 16:21:54,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:54,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25675217] [2020-10-15 16:21:54,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:54,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25675217] [2020-10-15 16:21:54,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115445631] [2020-10-15 16:21:54,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:54,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:21:54,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:54,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:54,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:55,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:55,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:55,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690473203] [2020-10-15 16:21:55,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:55,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:55,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:55,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:55,133 INFO L87 Difference]: Start difference. First operand 166 states and 416 transitions. Second operand 17 states. [2020-10-15 16:21:56,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:56,009 INFO L93 Difference]: Finished difference Result 248 states and 576 transitions. [2020-10-15 16:21:56,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:21:56,012 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:56,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:56,013 INFO L225 Difference]: With dead ends: 248 [2020-10-15 16:21:56,013 INFO L226 Difference]: Without dead ends: 246 [2020-10-15 16:21:56,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:21:56,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-15 16:21:56,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 167. [2020-10-15 16:21:56,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:21:56,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 16:21:56,016 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 16:21:56,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:56,017 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 16:21:56,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:56,017 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 16:21:56,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:56,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:56,017 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:56,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:56,218 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:56,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:56,218 INFO L82 PathProgramCache]: Analyzing trace with hash 971810621, now seen corresponding path program 215 times [2020-10-15 16:21:56,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:56,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109487510] [2020-10-15 16:21:56,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:56,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109487510] [2020-10-15 16:21:56,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187195125] [2020-10-15 16:21:56,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:56,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:21:56,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:56,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:56,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:56,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:56,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:56,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038341038] [2020-10-15 16:21:56,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:56,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:56,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:56,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:56,675 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 16:21:57,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:57,724 INFO L93 Difference]: Finished difference Result 245 states and 579 transitions. [2020-10-15 16:21:57,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 16:21:57,725 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:57,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:57,726 INFO L225 Difference]: With dead ends: 245 [2020-10-15 16:21:57,726 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 16:21:57,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=324, Invalid=798, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:21:57,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 16:21:57,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 169. [2020-10-15 16:21:57,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:21:57,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 16:21:57,731 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 16:21:57,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:57,731 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 16:21:57,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:57,731 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 16:21:57,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:57,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:57,732 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:57,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:57,943 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:57,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:57,943 INFO L82 PathProgramCache]: Analyzing trace with hash 971831980, now seen corresponding path program 216 times [2020-10-15 16:21:57,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:57,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923118286] [2020-10-15 16:21:57,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:58,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923118286] [2020-10-15 16:21:58,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946458160] [2020-10-15 16:21:58,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:58,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:21:58,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:21:58,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:58,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:58,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:21:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:58,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:58,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:58,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272783580] [2020-10-15 16:21:58,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:58,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:58,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:58,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:58,356 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 16:21:58,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:21:58,991 INFO L93 Difference]: Finished difference Result 223 states and 540 transitions. [2020-10-15 16:21:58,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:21:58,993 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:21:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:21:58,994 INFO L225 Difference]: With dead ends: 223 [2020-10-15 16:21:58,994 INFO L226 Difference]: Without dead ends: 218 [2020-10-15 16:21:58,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:21:58,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-15 16:21:58,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2020-10-15 16:21:58,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:21:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 16:21:58,997 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 16:21:58,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:21:58,997 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 16:21:58,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:21:58,998 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 16:21:58,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:21:58,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:21:58,998 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:21:59,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-10-15 16:21:59,199 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:21:59,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:21:59,199 INFO L82 PathProgramCache]: Analyzing trace with hash 971832941, now seen corresponding path program 217 times [2020-10-15 16:21:59,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:21:59,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491173665] [2020-10-15 16:21:59,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:21:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:59,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491173665] [2020-10-15 16:21:59,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709384525] [2020-10-15 16:21:59,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:21:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:21:59,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:21:59,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:21:59,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:21:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:21:59,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:21:59,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:21:59,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982664801] [2020-10-15 16:21:59,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:21:59,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:21:59,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:21:59,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:21:59,766 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 16:22:01,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:01,104 INFO L93 Difference]: Finished difference Result 286 states and 679 transitions. [2020-10-15 16:22:01,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:22:01,107 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:01,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:01,107 INFO L225 Difference]: With dead ends: 286 [2020-10-15 16:22:01,108 INFO L226 Difference]: Without dead ends: 281 [2020-10-15 16:22:01,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:22:01,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-15 16:22:01,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 167. [2020-10-15 16:22:01,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 16:22:01,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 16:22:01,111 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 16:22:01,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:01,111 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 16:22:01,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:01,111 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 16:22:01,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:01,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:01,111 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:01,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:01,312 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:01,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:01,313 INFO L82 PathProgramCache]: Analyzing trace with hash 971840412, now seen corresponding path program 218 times [2020-10-15 16:22:01,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:01,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080578831] [2020-10-15 16:22:01,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:01,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080578831] [2020-10-15 16:22:01,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199545200] [2020-10-15 16:22:01,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:01,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:22:01,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:01,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:01,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:01,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:01,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:01,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30954609] [2020-10-15 16:22:01,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:01,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:01,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:01,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:01,880 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 16:22:03,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:03,404 INFO L93 Difference]: Finished difference Result 268 states and 630 transitions. [2020-10-15 16:22:03,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 16:22:03,407 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:03,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:03,408 INFO L225 Difference]: With dead ends: 268 [2020-10-15 16:22:03,408 INFO L226 Difference]: Without dead ends: 266 [2020-10-15 16:22:03,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 16:22:03,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-15 16:22:03,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 169. [2020-10-15 16:22:03,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:22:03,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 16:22:03,411 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 16:22:03,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:03,412 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 16:22:03,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:03,412 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 16:22:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:03,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:03,412 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:03,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2020-10-15 16:22:03,613 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:03,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:03,614 INFO L82 PathProgramCache]: Analyzing trace with hash 971861771, now seen corresponding path program 219 times [2020-10-15 16:22:03,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:03,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334301027] [2020-10-15 16:22:03,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:03,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:03,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334301027] [2020-10-15 16:22:03,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313611291] [2020-10-15 16:22:03,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:03,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:22:03,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:03,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:03,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:04,098 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:22:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:04,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:04,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:04,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630949680] [2020-10-15 16:22:04,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:04,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:04,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:04,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:04,156 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 16:22:05,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:05,816 INFO L93 Difference]: Finished difference Result 296 states and 707 transitions. [2020-10-15 16:22:05,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:22:05,818 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:05,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:05,818 INFO L225 Difference]: With dead ends: 296 [2020-10-15 16:22:05,819 INFO L226 Difference]: Without dead ends: 291 [2020-10-15 16:22:05,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:22:05,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-15 16:22:05,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 169. [2020-10-15 16:22:05,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:22:05,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 16:22:05,822 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 16:22:05,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:05,822 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 16:22:05,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:05,823 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 16:22:05,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:05,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:05,823 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:06,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:06,024 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:06,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:06,025 INFO L82 PathProgramCache]: Analyzing trace with hash 971862732, now seen corresponding path program 220 times [2020-10-15 16:22:06,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:06,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797985117] [2020-10-15 16:22:06,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:06,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797985117] [2020-10-15 16:22:06,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62942616] [2020-10-15 16:22:06,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:06,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:22:06,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:06,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:06,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:06,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:22:06,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:06,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:06,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:06,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931148336] [2020-10-15 16:22:06,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:06,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:06,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:06,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:06,566 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 16:22:08,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:08,166 INFO L93 Difference]: Finished difference Result 299 states and 710 transitions. [2020-10-15 16:22:08,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:22:08,168 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:08,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:08,169 INFO L225 Difference]: With dead ends: 299 [2020-10-15 16:22:08,169 INFO L226 Difference]: Without dead ends: 294 [2020-10-15 16:22:08,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 16:22:08,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-15 16:22:08,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 165. [2020-10-15 16:22:08,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 16:22:08,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-15 16:22:08,173 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-15 16:22:08,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:08,173 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-15 16:22:08,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:08,173 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-15 16:22:08,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:08,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:08,174 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:08,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:08,375 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:08,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:08,375 INFO L82 PathProgramCache]: Analyzing trace with hash 972071052, now seen corresponding path program 221 times [2020-10-15 16:22:08,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:08,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711856092] [2020-10-15 16:22:08,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:08,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711856092] [2020-10-15 16:22:08,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789888164] [2020-10-15 16:22:08,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:08,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:22:08,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:08,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:08,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:10,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:10,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:10,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261296854] [2020-10-15 16:22:10,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:10,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:10,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:10,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:10,597 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-15 16:22:12,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:12,085 INFO L93 Difference]: Finished difference Result 274 states and 633 transitions. [2020-10-15 16:22:12,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:22:12,087 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:12,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:12,088 INFO L225 Difference]: With dead ends: 274 [2020-10-15 16:22:12,088 INFO L226 Difference]: Without dead ends: 272 [2020-10-15 16:22:12,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 16:22:12,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-15 16:22:12,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2020-10-15 16:22:12,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 16:22:12,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 16:22:12,092 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 16:22:12,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:12,093 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 16:22:12,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:12,093 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 16:22:12,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:12,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:12,093 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:12,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:12,303 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:12,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:12,304 INFO L82 PathProgramCache]: Analyzing trace with hash 972734142, now seen corresponding path program 222 times [2020-10-15 16:22:12,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:12,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762314075] [2020-10-15 16:22:12,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:12,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762314075] [2020-10-15 16:22:12,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749390575] [2020-10-15 16:22:12,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:12,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:22:12,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:12,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:12,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:12,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:12,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:12,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512533741] [2020-10-15 16:22:12,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:12,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:12,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:12,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:12,829 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 16:22:14,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:14,429 INFO L93 Difference]: Finished difference Result 282 states and 670 transitions. [2020-10-15 16:22:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 16:22:14,433 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:14,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:14,434 INFO L225 Difference]: With dead ends: 282 [2020-10-15 16:22:14,434 INFO L226 Difference]: Without dead ends: 280 [2020-10-15 16:22:14,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:22:14,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-15 16:22:14,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 174. [2020-10-15 16:22:14,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-15 16:22:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2020-10-15 16:22:14,443 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 14 [2020-10-15 16:22:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:14,443 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2020-10-15 16:22:14,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:14,443 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2020-10-15 16:22:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:14,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:14,444 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:14,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-15 16:22:14,651 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:14,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:14,652 INFO L82 PathProgramCache]: Analyzing trace with hash 972755501, now seen corresponding path program 223 times [2020-10-15 16:22:14,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:14,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415365320] [2020-10-15 16:22:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:14,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415365320] [2020-10-15 16:22:14,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189673857] [2020-10-15 16:22:14,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:14,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:14,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:15,152 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:22:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:15,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:15,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:15,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059636297] [2020-10-15 16:22:15,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:15,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:15,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:15,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:15,244 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand 17 states. [2020-10-15 16:22:17,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:17,516 INFO L93 Difference]: Finished difference Result 321 states and 773 transitions. [2020-10-15 16:22:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:22:17,518 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:17,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:17,519 INFO L225 Difference]: With dead ends: 321 [2020-10-15 16:22:17,519 INFO L226 Difference]: Without dead ends: 313 [2020-10-15 16:22:17,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 16:22:17,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-15 16:22:17,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 176. [2020-10-15 16:22:17,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-15 16:22:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 452 transitions. [2020-10-15 16:22:17,524 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 452 transitions. Word has length 14 [2020-10-15 16:22:17,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:17,524 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 452 transitions. [2020-10-15 16:22:17,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:17,524 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 452 transitions. [2020-10-15 16:22:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:17,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:17,524 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:17,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-10-15 16:22:17,726 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:17,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:17,727 INFO L82 PathProgramCache]: Analyzing trace with hash 972756462, now seen corresponding path program 224 times [2020-10-15 16:22:17,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:17,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738085586] [2020-10-15 16:22:17,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:17,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738085586] [2020-10-15 16:22:17,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069031075] [2020-10-15 16:22:17,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:17,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:22:17,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:17,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:17,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:22,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:22:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:22,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:22,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:22,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427127165] [2020-10-15 16:22:22,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:22,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:22,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:22,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=190, Unknown=2, NotChecked=0, Total=272 [2020-10-15 16:22:22,426 INFO L87 Difference]: Start difference. First operand 176 states and 452 transitions. Second operand 17 states. [2020-10-15 16:22:27,338 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-15 16:22:31,528 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-15 16:22:35,831 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-15 16:22:40,142 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-15 16:22:42,246 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-15 16:22:47,008 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-15 16:22:47,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:47,880 INFO L93 Difference]: Finished difference Result 323 states and 782 transitions. [2020-10-15 16:22:47,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:22:47,882 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:47,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:47,883 INFO L225 Difference]: With dead ends: 323 [2020-10-15 16:22:47,883 INFO L226 Difference]: Without dead ends: 315 [2020-10-15 16:22:47,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=530, Invalid=1274, Unknown=2, NotChecked=0, Total=1806 [2020-10-15 16:22:47,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-15 16:22:47,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 171. [2020-10-15 16:22:47,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 16:22:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-10-15 16:22:47,886 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-10-15 16:22:47,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:47,887 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-10-15 16:22:47,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:47,887 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-10-15 16:22:47,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:47,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:47,887 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:48,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-10-15 16:22:48,088 INFO L429 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:48,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:48,088 INFO L82 PathProgramCache]: Analyzing trace with hash 972785292, now seen corresponding path program 225 times [2020-10-15 16:22:48,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:48,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306670395] [2020-10-15 16:22:48,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:48,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306670395] [2020-10-15 16:22:48,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559996333] [2020-10-15 16:22:48,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:48,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:22:48,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:48,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:48,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:48,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:22:48,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:22:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:48,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:48,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:48,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919019038] [2020-10-15 16:22:48,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:48,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:48,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:48,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:48,675 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-10-15 16:22:51,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:51,211 INFO L93 Difference]: Finished difference Result 320 states and 767 transitions. [2020-10-15 16:22:51,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:22:51,213 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:51,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:51,214 INFO L225 Difference]: With dead ends: 320 [2020-10-15 16:22:51,214 INFO L226 Difference]: Without dead ends: 312 [2020-10-15 16:22:51,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 16:22:51,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-15 16:22:51,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 170. [2020-10-15 16:22:51,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-15 16:22:51,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 431 transitions. [2020-10-15 16:22:51,218 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 431 transitions. Word has length 14 [2020-10-15 16:22:51,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:51,218 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 431 transitions. [2020-10-15 16:22:51,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:51,219 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 431 transitions. [2020-10-15 16:22:51,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:51,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:51,219 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:51,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-10-15 16:22:51,424 INFO L429 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:51,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:51,424 INFO L82 PathProgramCache]: Analyzing trace with hash 979221853, now seen corresponding path program 226 times [2020-10-15 16:22:51,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:51,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253934128] [2020-10-15 16:22:51,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:51,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253934128] [2020-10-15 16:22:51,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877469916] [2020-10-15 16:22:51,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:51,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:22:51,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:51,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:51,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:52,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:52,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:52,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610237066] [2020-10-15 16:22:52,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:52,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:52,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:52,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:52,119 INFO L87 Difference]: Start difference. First operand 170 states and 431 transitions. Second operand 17 states. [2020-10-15 16:22:53,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:53,245 INFO L93 Difference]: Finished difference Result 256 states and 599 transitions. [2020-10-15 16:22:53,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 16:22:53,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:53,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:53,248 INFO L225 Difference]: With dead ends: 256 [2020-10-15 16:22:53,248 INFO L226 Difference]: Without dead ends: 254 [2020-10-15 16:22:53,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:22:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-15 16:22:53,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 168. [2020-10-15 16:22:53,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-15 16:22:53,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 425 transitions. [2020-10-15 16:22:53,252 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 425 transitions. Word has length 14 [2020-10-15 16:22:53,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:53,252 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 425 transitions. [2020-10-15 16:22:53,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:53,252 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 425 transitions. [2020-10-15 16:22:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:53,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:53,252 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:53,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2020-10-15 16:22:53,453 INFO L429 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:53,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:53,454 INFO L82 PathProgramCache]: Analyzing trace with hash 999776682, now seen corresponding path program 227 times [2020-10-15 16:22:53,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:53,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322365063] [2020-10-15 16:22:53,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:53,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322365063] [2020-10-15 16:22:53,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074243540] [2020-10-15 16:22:53,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:53,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:22:53,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:53,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:53,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:54,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:54,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:54,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801604497] [2020-10-15 16:22:54,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:54,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:54,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:54,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:54,120 INFO L87 Difference]: Start difference. First operand 168 states and 425 transitions. Second operand 17 states. [2020-10-15 16:22:55,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:55,744 INFO L93 Difference]: Finished difference Result 294 states and 688 transitions. [2020-10-15 16:22:55,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:22:55,747 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:55,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:55,748 INFO L225 Difference]: With dead ends: 294 [2020-10-15 16:22:55,748 INFO L226 Difference]: Without dead ends: 292 [2020-10-15 16:22:55,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=389, Invalid=943, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 16:22:55,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-15 16:22:55,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 166. [2020-10-15 16:22:55,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:22:55,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 423 transitions. [2020-10-15 16:22:55,752 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 423 transitions. Word has length 14 [2020-10-15 16:22:55,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:55,752 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 423 transitions. [2020-10-15 16:22:55,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:55,752 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 423 transitions. [2020-10-15 16:22:55,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:55,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:55,753 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:55,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:55,953 INFO L429 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:55,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:55,954 INFO L82 PathProgramCache]: Analyzing trace with hash 999777643, now seen corresponding path program 228 times [2020-10-15 16:22:55,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:55,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70096033] [2020-10-15 16:22:55,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:56,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70096033] [2020-10-15 16:22:56,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982259684] [2020-10-15 16:22:56,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:56,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:22:56,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:22:56,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:56,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:56,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:56,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:56,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690715148] [2020-10-15 16:22:56,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:56,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:56,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:56,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:56,514 INFO L87 Difference]: Start difference. First operand 166 states and 423 transitions. Second operand 17 states. [2020-10-15 16:22:57,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:22:57,736 INFO L93 Difference]: Finished difference Result 266 states and 625 transitions. [2020-10-15 16:22:57,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 16:22:57,739 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:22:57,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:22:57,740 INFO L225 Difference]: With dead ends: 266 [2020-10-15 16:22:57,740 INFO L226 Difference]: Without dead ends: 264 [2020-10-15 16:22:57,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=316, Invalid=806, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 16:22:57,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-15 16:22:57,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 164. [2020-10-15 16:22:57,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:22:57,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-10-15 16:22:57,743 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-10-15 16:22:57,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:22:57,744 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-10-15 16:22:57,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:22:57,744 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-10-15 16:22:57,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:22:57,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:22:57,744 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:22:57,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:57,945 INFO L429 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:22:57,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:22:57,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1000439772, now seen corresponding path program 229 times [2020-10-15 16:22:57,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:22:57,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636776652] [2020-10-15 16:22:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:22:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:58,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636776652] [2020-10-15 16:22:58,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590884871] [2020-10-15 16:22:58,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:22:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:22:58,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:22:58,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:22:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:22:58,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:22:58,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:22:58,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243528369] [2020-10-15 16:22:58,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:22:58,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:22:58,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:22:58,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:22:58,483 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-10-15 16:23:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:00,125 INFO L93 Difference]: Finished difference Result 275 states and 656 transitions. [2020-10-15 16:23:00,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:23:00,128 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:00,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:00,129 INFO L225 Difference]: With dead ends: 275 [2020-10-15 16:23:00,129 INFO L226 Difference]: Without dead ends: 273 [2020-10-15 16:23:00,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:23:00,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-15 16:23:00,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 166. [2020-10-15 16:23:00,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:23:00,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-15 16:23:00,133 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-15 16:23:00,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:00,133 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-15 16:23:00,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:00,133 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-15 16:23:00,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:00,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:00,134 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:00,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:00,334 INFO L429 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:00,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:00,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1000461131, now seen corresponding path program 230 times [2020-10-15 16:23:00,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:00,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526203214] [2020-10-15 16:23:00,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:00,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526203214] [2020-10-15 16:23:00,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552408486] [2020-10-15 16:23:00,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:00,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:23:00,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:00,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:00,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:00,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:23:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:00,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:00,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:00,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969898623] [2020-10-15 16:23:00,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:00,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:00,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:00,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:00,949 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-15 16:23:02,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:02,731 INFO L93 Difference]: Finished difference Result 285 states and 690 transitions. [2020-10-15 16:23:02,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 16:23:02,734 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:02,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:02,735 INFO L225 Difference]: With dead ends: 285 [2020-10-15 16:23:02,735 INFO L226 Difference]: Without dead ends: 277 [2020-10-15 16:23:02,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 16:23:02,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-15 16:23:02,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 166. [2020-10-15 16:23:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:23:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-15 16:23:02,739 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-15 16:23:02,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:02,739 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-15 16:23:02,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:02,740 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-15 16:23:02,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:02,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:02,740 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:02,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2020-10-15 16:23:02,944 INFO L429 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:02,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:02,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1000462092, now seen corresponding path program 231 times [2020-10-15 16:23:02,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:02,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905342871] [2020-10-15 16:23:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:03,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905342871] [2020-10-15 16:23:03,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489976210] [2020-10-15 16:23:03,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:03,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:23:03,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:03,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:03,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:03,615 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:23:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:03,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:03,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:03,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349500525] [2020-10-15 16:23:03,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:03,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:03,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:03,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:03,715 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-15 16:23:05,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:05,573 INFO L93 Difference]: Finished difference Result 307 states and 744 transitions. [2020-10-15 16:23:05,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:23:05,575 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:05,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:05,575 INFO L225 Difference]: With dead ends: 307 [2020-10-15 16:23:05,575 INFO L226 Difference]: Without dead ends: 299 [2020-10-15 16:23:05,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:23:05,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-15 16:23:05,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 164. [2020-10-15 16:23:05,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:23:05,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-10-15 16:23:05,579 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-10-15 16:23:05,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:05,580 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-10-15 16:23:05,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:05,580 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-10-15 16:23:05,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:05,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:05,580 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:05,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:05,781 INFO L429 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:05,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:05,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1000469563, now seen corresponding path program 232 times [2020-10-15 16:23:05,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:05,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311527798] [2020-10-15 16:23:05,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:05,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:05,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311527798] [2020-10-15 16:23:05,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839922939] [2020-10-15 16:23:05,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:06,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:23:06,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:06,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:06,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:06,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:06,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:06,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580841284] [2020-10-15 16:23:06,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:06,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:06,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:06,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:06,301 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-10-15 16:23:08,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:08,023 INFO L93 Difference]: Finished difference Result 280 states and 668 transitions. [2020-10-15 16:23:08,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 16:23:08,026 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:08,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:08,026 INFO L225 Difference]: With dead ends: 280 [2020-10-15 16:23:08,027 INFO L226 Difference]: Without dead ends: 278 [2020-10-15 16:23:08,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=412, Invalid=994, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 16:23:08,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-15 16:23:08,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 166. [2020-10-15 16:23:08,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 16:23:08,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-15 16:23:08,030 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-15 16:23:08,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:08,030 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-15 16:23:08,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-15 16:23:08,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:08,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:08,031 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:08,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2020-10-15 16:23:08,233 INFO L429 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:08,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:08,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1000490922, now seen corresponding path program 233 times [2020-10-15 16:23:08,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:08,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693482716] [2020-10-15 16:23:08,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:08,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693482716] [2020-10-15 16:23:08,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617063450] [2020-10-15 16:23:08,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:08,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:23:08,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:08,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:08,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:08,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:23:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:08,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:08,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:08,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285802761] [2020-10-15 16:23:08,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:08,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:08,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:08,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:08,899 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-15 16:23:10,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:10,893 INFO L93 Difference]: Finished difference Result 315 states and 764 transitions. [2020-10-15 16:23:10,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 16:23:10,896 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:10,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:10,897 INFO L225 Difference]: With dead ends: 315 [2020-10-15 16:23:10,897 INFO L226 Difference]: Without dead ends: 307 [2020-10-15 16:23:10,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 16:23:10,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-15 16:23:10,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 164. [2020-10-15 16:23:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 16:23:10,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 414 transitions. [2020-10-15 16:23:10,901 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 414 transitions. Word has length 14 [2020-10-15 16:23:10,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:10,901 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 414 transitions. [2020-10-15 16:23:10,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:10,901 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 414 transitions. [2020-10-15 16:23:10,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:10,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:10,902 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:11,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:11,102 INFO L429 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:11,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:11,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1000491883, now seen corresponding path program 234 times [2020-10-15 16:23:11,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:11,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283656263] [2020-10-15 16:23:11,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:11,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283656263] [2020-10-15 16:23:11,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431254414] [2020-10-15 16:23:11,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:11,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:23:11,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:11,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:11,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:11,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:23:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:11,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:11,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:11,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055558483] [2020-10-15 16:23:11,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:11,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:11,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:11,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:11,790 INFO L87 Difference]: Start difference. First operand 164 states and 414 transitions. Second operand 17 states. [2020-10-15 16:23:14,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:14,117 INFO L93 Difference]: Finished difference Result 312 states and 754 transitions. [2020-10-15 16:23:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:23:14,120 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:14,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:14,121 INFO L225 Difference]: With dead ends: 312 [2020-10-15 16:23:14,121 INFO L226 Difference]: Without dead ends: 304 [2020-10-15 16:23:14,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:23:14,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-15 16:23:14,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 157. [2020-10-15 16:23:14,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 16:23:14,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 391 transitions. [2020-10-15 16:23:14,125 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 391 transitions. Word has length 14 [2020-10-15 16:23:14,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:14,126 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 391 transitions. [2020-10-15 16:23:14,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:14,126 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 391 transitions. [2020-10-15 16:23:14,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:14,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:14,126 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:14,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-10-15 16:23:14,327 INFO L429 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:14,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:14,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1001384652, now seen corresponding path program 235 times [2020-10-15 16:23:14,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:14,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29217368] [2020-10-15 16:23:14,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:14,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29217368] [2020-10-15 16:23:14,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116773724] [2020-10-15 16:23:14,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:14,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:14,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:14,919 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:23:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:14,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:14,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:14,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486562473] [2020-10-15 16:23:14,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:14,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:14,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:14,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:14,947 INFO L87 Difference]: Start difference. First operand 157 states and 391 transitions. Second operand 17 states. [2020-10-15 16:23:17,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:17,490 INFO L93 Difference]: Finished difference Result 307 states and 730 transitions. [2020-10-15 16:23:17,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 16:23:17,493 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:17,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:17,494 INFO L225 Difference]: With dead ends: 307 [2020-10-15 16:23:17,494 INFO L226 Difference]: Without dead ends: 299 [2020-10-15 16:23:17,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 16:23:17,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-15 16:23:17,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 155. [2020-10-15 16:23:17,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-15 16:23:17,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 381 transitions. [2020-10-15 16:23:17,498 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 381 transitions. Word has length 14 [2020-10-15 16:23:17,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:17,498 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 381 transitions. [2020-10-15 16:23:17,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:17,498 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 381 transitions. [2020-10-15 16:23:17,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:17,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:17,499 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:17,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:17,699 INFO L429 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:17,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:17,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1866754364, now seen corresponding path program 236 times [2020-10-15 16:23:17,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:17,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663317848] [2020-10-15 16:23:17,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:17,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663317848] [2020-10-15 16:23:17,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056632988] [2020-10-15 16:23:17,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:18,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:23:18,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:18,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:18,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:18,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:18,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:18,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970636815] [2020-10-15 16:23:18,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:18,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:18,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:18,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:18,460 INFO L87 Difference]: Start difference. First operand 155 states and 381 transitions. Second operand 17 states. [2020-10-15 16:23:19,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:19,297 INFO L93 Difference]: Finished difference Result 225 states and 519 transitions. [2020-10-15 16:23:19,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:23:19,300 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:19,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:19,301 INFO L225 Difference]: With dead ends: 225 [2020-10-15 16:23:19,301 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 16:23:19,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:23:19,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 16:23:19,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 153. [2020-10-15 16:23:19,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-15 16:23:19,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 376 transitions. [2020-10-15 16:23:19,304 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 376 transitions. Word has length 14 [2020-10-15 16:23:19,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:19,305 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 376 transitions. [2020-10-15 16:23:19,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:19,305 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 376 transitions. [2020-10-15 16:23:19,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:19,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:19,305 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:19,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-10-15 16:23:19,506 INFO L429 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:19,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:19,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1888203884, now seen corresponding path program 237 times [2020-10-15 16:23:19,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:19,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5360810] [2020-10-15 16:23:19,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:19,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5360810] [2020-10-15 16:23:19,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834448538] [2020-10-15 16:23:19,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:19,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:23:19,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:19,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:19,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:20,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:20,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:20,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870510676] [2020-10-15 16:23:20,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:20,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:20,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:20,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:20,255 INFO L87 Difference]: Start difference. First operand 153 states and 376 transitions. Second operand 17 states. [2020-10-15 16:23:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:21,131 INFO L93 Difference]: Finished difference Result 223 states and 512 transitions. [2020-10-15 16:23:21,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:23:21,134 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:21,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:21,134 INFO L225 Difference]: With dead ends: 223 [2020-10-15 16:23:21,135 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 16:23:21,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:23:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 16:23:21,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 151. [2020-10-15 16:23:21,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-15 16:23:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 371 transitions. [2020-10-15 16:23:21,138 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 371 transitions. Word has length 14 [2020-10-15 16:23:21,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:21,138 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 371 transitions. [2020-10-15 16:23:21,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:21,138 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 371 transitions. [2020-10-15 16:23:21,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:21,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:21,139 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:21,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2020-10-15 16:23:21,342 INFO L429 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:21,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:21,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1888866974, now seen corresponding path program 238 times [2020-10-15 16:23:21,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:21,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557231414] [2020-10-15 16:23:21,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:21,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557231414] [2020-10-15 16:23:21,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738600102] [2020-10-15 16:23:21,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:21,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:23:21,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:21,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:21,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:22,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:22,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:22,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593512793] [2020-10-15 16:23:22,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:22,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:22,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:22,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:22,118 INFO L87 Difference]: Start difference. First operand 151 states and 371 transitions. Second operand 17 states. [2020-10-15 16:23:23,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:23,169 INFO L93 Difference]: Finished difference Result 221 states and 510 transitions. [2020-10-15 16:23:23,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:23:23,173 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:23,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:23,174 INFO L225 Difference]: With dead ends: 221 [2020-10-15 16:23:23,174 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 16:23:23,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=229, Invalid=527, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:23:23,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 16:23:23,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 152. [2020-10-15 16:23:23,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-15 16:23:23,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 373 transitions. [2020-10-15 16:23:23,177 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 373 transitions. Word has length 14 [2020-10-15 16:23:23,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:23,177 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 373 transitions. [2020-10-15 16:23:23,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:23,177 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 373 transitions. [2020-10-15 16:23:23,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:23,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:23,178 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:23,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:23,378 INFO L429 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:23,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:23,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1888889294, now seen corresponding path program 239 times [2020-10-15 16:23:23,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:23,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326434146] [2020-10-15 16:23:23,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:23,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326434146] [2020-10-15 16:23:23,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378097847] [2020-10-15 16:23:23,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:23,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:23:23,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:23,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:23,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:24,098 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 16:23:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:26,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:26,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 16:23:26,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921226596] [2020-10-15 16:23:26,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 16:23:26,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:26,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 16:23:26,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2020-10-15 16:23:26,238 INFO L87 Difference]: Start difference. First operand 152 states and 373 transitions. Second operand 18 states. [2020-10-15 16:23:46,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:46,527 INFO L93 Difference]: Finished difference Result 259 states and 601 transitions. [2020-10-15 16:23:46,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 16:23:46,538 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 16:23:46,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:46,538 INFO L225 Difference]: With dead ends: 259 [2020-10-15 16:23:46,538 INFO L226 Difference]: Without dead ends: 254 [2020-10-15 16:23:46,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=334, Invalid=720, Unknown=2, NotChecked=0, Total=1056 [2020-10-15 16:23:46,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-15 16:23:46,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 150. [2020-10-15 16:23:46,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-15 16:23:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 366 transitions. [2020-10-15 16:23:46,546 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 366 transitions. Word has length 14 [2020-10-15 16:23:46,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:46,546 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 366 transitions. [2020-10-15 16:23:46,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 16:23:46,546 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 366 transitions. [2020-10-15 16:23:46,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:46,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:46,546 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:46,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:46,747 INFO L429 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:46,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:46,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1888918124, now seen corresponding path program 240 times [2020-10-15 16:23:46,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:46,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766319106] [2020-10-15 16:23:46,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:46,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766319106] [2020-10-15 16:23:46,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616499019] [2020-10-15 16:23:46,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:47,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:23:47,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:47,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 16:23:47,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:47,346 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 16:23:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:47,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:47,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 16:23:47,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343096233] [2020-10-15 16:23:47,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 16:23:47,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:47,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 16:23:47,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 16:23:47,376 INFO L87 Difference]: Start difference. First operand 150 states and 366 transitions. Second operand 17 states. [2020-10-15 16:23:48,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:48,288 INFO L93 Difference]: Finished difference Result 225 states and 522 transitions. [2020-10-15 16:23:48,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:23:48,291 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 16:23:48,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:48,292 INFO L225 Difference]: With dead ends: 225 [2020-10-15 16:23:48,292 INFO L226 Difference]: Without dead ends: 220 [2020-10-15 16:23:48,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:23:48,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-15 16:23:48,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 146. [2020-10-15 16:23:48,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 16:23:48,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 342 transitions. [2020-10-15 16:23:48,296 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 342 transitions. Word has length 14 [2020-10-15 16:23:48,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:48,296 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 342 transitions. [2020-10-15 16:23:48,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 16:23:48,296 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 342 transitions. [2020-10-15 16:23:48,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:48,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:48,297 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:48,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:48,497 INFO L429 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:48,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:48,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1949255125, now seen corresponding path program 7 times [2020-10-15 16:23:48,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:48,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51621690] [2020-10-15 16:23:48,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:48,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51621690] [2020-10-15 16:23:48,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190118163] [2020-10-15 16:23:48,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:48,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:23:48,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:49,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 16:23:49,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 18 [2020-10-15 16:23:49,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690831886] [2020-10-15 16:23:49,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:23:49,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:49,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:23:49,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:23:49,054 INFO L87 Difference]: Start difference. First operand 146 states and 342 transitions. Second operand 9 states. [2020-10-15 16:23:49,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:49,122 INFO L93 Difference]: Finished difference Result 235 states and 626 transitions. [2020-10-15 16:23:49,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:23:49,125 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-15 16:23:49,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:49,125 INFO L225 Difference]: With dead ends: 235 [2020-10-15 16:23:49,125 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 16:23:49,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:23:49,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 16:23:49,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2020-10-15 16:23:49,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-15 16:23:49,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 611 transitions. [2020-10-15 16:23:49,130 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 611 transitions. Word has length 14 [2020-10-15 16:23:49,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:49,130 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 611 transitions. [2020-10-15 16:23:49,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:23:49,130 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 611 transitions. [2020-10-15 16:23:49,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 16:23:49,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:49,130 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:49,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:49,331 INFO L429 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:49,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:49,332 INFO L82 PathProgramCache]: Analyzing trace with hash 163688120, now seen corresponding path program 28 times [2020-10-15 16:23:49,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:49,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278509748] [2020-10-15 16:23:49,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:49,747 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:49,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278509748] [2020-10-15 16:23:49,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894026703] [2020-10-15 16:23:49,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:49,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:23:49,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:49,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 16:23:49,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:49,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 16:23:49,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 18 [2020-10-15 16:23:49,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687891166] [2020-10-15 16:23:49,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 16:23:49,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:49,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 16:23:49,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:23:49,968 INFO L87 Difference]: Start difference. First operand 227 states and 611 transitions. Second operand 9 states. [2020-10-15 16:23:50,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:50,045 INFO L93 Difference]: Finished difference Result 338 states and 895 transitions. [2020-10-15 16:23:50,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 16:23:50,047 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-15 16:23:50,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:50,048 INFO L225 Difference]: With dead ends: 338 [2020-10-15 16:23:50,048 INFO L226 Difference]: Without dead ends: 312 [2020-10-15 16:23:50,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-15 16:23:50,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-15 16:23:50,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2020-10-15 16:23:50,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-15 16:23:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 836 transitions. [2020-10-15 16:23:50,052 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 836 transitions. Word has length 14 [2020-10-15 16:23:50,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:50,052 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 836 transitions. [2020-10-15 16:23:50,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 16:23:50,053 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 836 transitions. [2020-10-15 16:23:50,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:23:50,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:50,053 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:50,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2020-10-15 16:23:50,255 INFO L429 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:50,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:50,255 INFO L82 PathProgramCache]: Analyzing trace with hash 491277249, now seen corresponding path program 241 times [2020-10-15 16:23:50,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:50,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133683928] [2020-10-15 16:23:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:50,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133683928] [2020-10-15 16:23:50,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630930791] [2020-10-15 16:23:50,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:50,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:23:50,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:51,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:51,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:23:51,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375089346] [2020-10-15 16:23:51,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:23:51,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:51,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:23:51,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:23:51,106 INFO L87 Difference]: Start difference. First operand 312 states and 836 transitions. Second operand 19 states. [2020-10-15 16:23:51,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:51,297 INFO L93 Difference]: Finished difference Result 353 states and 914 transitions. [2020-10-15 16:23:51,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 16:23:51,301 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:23:51,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:51,302 INFO L225 Difference]: With dead ends: 353 [2020-10-15 16:23:51,302 INFO L226 Difference]: Without dead ends: 351 [2020-10-15 16:23:51,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:23:51,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-15 16:23:51,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 324. [2020-10-15 16:23:51,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-15 16:23:51,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 870 transitions. [2020-10-15 16:23:51,307 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 870 transitions. Word has length 15 [2020-10-15 16:23:51,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:51,307 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 870 transitions. [2020-10-15 16:23:51,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:23:51,307 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 870 transitions. [2020-10-15 16:23:51,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:23:51,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:51,308 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:51,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:51,508 INFO L429 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:51,509 INFO L82 PathProgramCache]: Analyzing trace with hash 491278210, now seen corresponding path program 242 times [2020-10-15 16:23:51,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:51,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612222345] [2020-10-15 16:23:51,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:51,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612222345] [2020-10-15 16:23:51,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760612662] [2020-10-15 16:23:51,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:51,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:23:51,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:51,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:23:51,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:52,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:52,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:52,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:23:52,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70851145] [2020-10-15 16:23:52,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:23:52,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:52,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:23:52,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:23:52,290 INFO L87 Difference]: Start difference. First operand 324 states and 870 transitions. Second operand 19 states. [2020-10-15 16:23:52,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:52,905 INFO L93 Difference]: Finished difference Result 377 states and 965 transitions. [2020-10-15 16:23:52,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:23:52,909 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:23:52,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:52,910 INFO L225 Difference]: With dead ends: 377 [2020-10-15 16:23:52,910 INFO L226 Difference]: Without dead ends: 374 [2020-10-15 16:23:52,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2020-10-15 16:23:52,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-15 16:23:52,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 325. [2020-10-15 16:23:52,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-15 16:23:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 873 transitions. [2020-10-15 16:23:52,919 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 873 transitions. Word has length 15 [2020-10-15 16:23:52,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:52,919 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 873 transitions. [2020-10-15 16:23:52,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:23:52,920 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 873 transitions. [2020-10-15 16:23:52,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:23:52,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:52,920 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:53,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-10-15 16:23:53,121 INFO L429 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:53,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:53,121 INFO L82 PathProgramCache]: Analyzing trace with hash 491307040, now seen corresponding path program 243 times [2020-10-15 16:23:53,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:53,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306314690] [2020-10-15 16:23:53,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:53,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306314690] [2020-10-15 16:23:53,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541608806] [2020-10-15 16:23:53,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:53,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:23:53,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:53,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:23:53,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:23:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:54,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:23:54,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:23:54,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214415718] [2020-10-15 16:23:54,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:23:54,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:23:54,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:23:54,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:23:54,045 INFO L87 Difference]: Start difference. First operand 325 states and 873 transitions. Second operand 19 states. [2020-10-15 16:23:54,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:23:54,854 INFO L93 Difference]: Finished difference Result 408 states and 1035 transitions. [2020-10-15 16:23:54,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:23:54,857 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:23:54,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:23:54,858 INFO L225 Difference]: With dead ends: 408 [2020-10-15 16:23:54,858 INFO L226 Difference]: Without dead ends: 404 [2020-10-15 16:23:54,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:23:54,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-15 16:23:54,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 327. [2020-10-15 16:23:54,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-15 16:23:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 879 transitions. [2020-10-15 16:23:54,863 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 879 transitions. Word has length 15 [2020-10-15 16:23:54,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:23:54,863 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 879 transitions. [2020-10-15 16:23:54,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:23:54,864 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 879 transitions. [2020-10-15 16:23:54,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:23:54,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:23:54,864 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:23:55,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:55,065 INFO L429 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:23:55,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:23:55,065 INFO L82 PathProgramCache]: Analyzing trace with hash 492200770, now seen corresponding path program 244 times [2020-10-15 16:23:55,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:23:55,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206854827] [2020-10-15 16:23:55,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:23:55,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:23:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:23:55,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206854827] [2020-10-15 16:23:55,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068085374] [2020-10-15 16:23:55,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:23:55,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:23:55,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:23:55,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:23:55,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:04,126 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-15 16:24:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:04,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:04,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-10-15 16:24:04,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448615144] [2020-10-15 16:24:04,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 16:24:04,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:04,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 16:24:04,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=253, Unknown=3, NotChecked=0, Total=380 [2020-10-15 16:24:04,130 INFO L87 Difference]: Start difference. First operand 327 states and 879 transitions. Second operand 20 states. [2020-10-15 16:24:06,488 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-15 16:24:17,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:17,018 INFO L93 Difference]: Finished difference Result 420 states and 1055 transitions. [2020-10-15 16:24:17,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:24:17,021 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-10-15 16:24:17,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:17,022 INFO L225 Difference]: With dead ends: 420 [2020-10-15 16:24:17,022 INFO L226 Difference]: Without dead ends: 417 [2020-10-15 16:24:17,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=266, Invalid=487, Unknown=3, NotChecked=0, Total=756 [2020-10-15 16:24:17,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-15 16:24:17,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 329. [2020-10-15 16:24:17,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-15 16:24:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 885 transitions. [2020-10-15 16:24:17,029 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 885 transitions. Word has length 15 [2020-10-15 16:24:17,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:17,029 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 885 transitions. [2020-10-15 16:24:17,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 16:24:17,029 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 885 transitions. [2020-10-15 16:24:17,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:17,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:17,030 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:17,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-10-15 16:24:17,241 INFO L429 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:17,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:17,242 INFO L82 PathProgramCache]: Analyzing trace with hash 492201731, now seen corresponding path program 245 times [2020-10-15 16:24:17,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:17,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890754738] [2020-10-15 16:24:17,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:17,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890754738] [2020-10-15 16:24:17,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721305005] [2020-10-15 16:24:17,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:17,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:24:17,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:17,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:17,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:21,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:21,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:21,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670382014] [2020-10-15 16:24:21,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:21,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:21,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:21,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=236, Unknown=1, NotChecked=0, Total=342 [2020-10-15 16:24:21,186 INFO L87 Difference]: Start difference. First operand 329 states and 885 transitions. Second operand 19 states. [2020-10-15 16:24:25,562 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-15 16:24:26,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:26,207 INFO L93 Difference]: Finished difference Result 437 states and 1102 transitions. [2020-10-15 16:24:26,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:24:26,211 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:26,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:26,212 INFO L225 Difference]: With dead ends: 437 [2020-10-15 16:24:26,212 INFO L226 Difference]: Without dead ends: 432 [2020-10-15 16:24:26,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=231, Invalid=470, Unknown=1, NotChecked=0, Total=702 [2020-10-15 16:24:26,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-15 16:24:26,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 330. [2020-10-15 16:24:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-15 16:24:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 888 transitions. [2020-10-15 16:24:26,225 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 888 transitions. Word has length 15 [2020-10-15 16:24:26,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:26,226 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 888 transitions. [2020-10-15 16:24:26,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:26,226 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 888 transitions. [2020-10-15 16:24:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:26,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:26,226 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:26,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:26,427 INFO L429 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:26,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:26,428 INFO L82 PathProgramCache]: Analyzing trace with hash 492230561, now seen corresponding path program 246 times [2020-10-15 16:24:26,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:26,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682619171] [2020-10-15 16:24:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:26,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682619171] [2020-10-15 16:24:26,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238945448] [2020-10-15 16:24:26,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:26,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:24:26,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:26,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:26,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:27,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:27,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:27,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661246646] [2020-10-15 16:24:27,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:27,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:27,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:27,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:24:27,448 INFO L87 Difference]: Start difference. First operand 330 states and 888 transitions. Second operand 19 states. [2020-10-15 16:24:28,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:28,488 INFO L93 Difference]: Finished difference Result 427 states and 1079 transitions. [2020-10-15 16:24:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:24:28,492 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:28,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:28,493 INFO L225 Difference]: With dead ends: 427 [2020-10-15 16:24:28,493 INFO L226 Difference]: Without dead ends: 423 [2020-10-15 16:24:28,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:24:28,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-15 16:24:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 330. [2020-10-15 16:24:28,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-15 16:24:28,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 888 transitions. [2020-10-15 16:24:28,499 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 888 transitions. Word has length 15 [2020-10-15 16:24:28,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:28,499 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 888 transitions. [2020-10-15 16:24:28,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:28,499 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 888 transitions. [2020-10-15 16:24:28,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:28,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:28,499 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:28,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:28,700 INFO L429 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:28,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:28,701 INFO L82 PathProgramCache]: Analyzing trace with hash 519906400, now seen corresponding path program 247 times [2020-10-15 16:24:28,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:28,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899191147] [2020-10-15 16:24:28,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:29,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899191147] [2020-10-15 16:24:29,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96162123] [2020-10-15 16:24:29,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:29,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:29,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:29,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:29,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:29,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821608432] [2020-10-15 16:24:29,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:29,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:29,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:29,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:24:29,599 INFO L87 Difference]: Start difference. First operand 330 states and 888 transitions. Second operand 19 states. [2020-10-15 16:24:30,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:30,921 INFO L93 Difference]: Finished difference Result 411 states and 1040 transitions. [2020-10-15 16:24:30,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:24:30,924 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:30,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:30,925 INFO L225 Difference]: With dead ends: 411 [2020-10-15 16:24:30,925 INFO L226 Difference]: Without dead ends: 408 [2020-10-15 16:24:30,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:24:30,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-15 16:24:30,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 333. [2020-10-15 16:24:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-15 16:24:30,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 897 transitions. [2020-10-15 16:24:30,930 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 897 transitions. Word has length 15 [2020-10-15 16:24:30,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:30,930 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 897 transitions. [2020-10-15 16:24:30,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:30,930 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 897 transitions. [2020-10-15 16:24:30,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:30,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:30,931 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:31,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2020-10-15 16:24:31,132 INFO L429 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:31,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:31,132 INFO L82 PathProgramCache]: Analyzing trace with hash 519907361, now seen corresponding path program 248 times [2020-10-15 16:24:31,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:31,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488213914] [2020-10-15 16:24:31,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:31,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488213914] [2020-10-15 16:24:31,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260698695] [2020-10-15 16:24:31,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:31,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:24:31,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:31,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:31,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:32,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:32,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:32,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574662894] [2020-10-15 16:24:32,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:32,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:32,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:32,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:24:32,021 INFO L87 Difference]: Start difference. First operand 333 states and 897 transitions. Second operand 19 states. [2020-10-15 16:24:32,846 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-15 16:24:33,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:24:33,204 INFO L93 Difference]: Finished difference Result 441 states and 1112 transitions. [2020-10-15 16:24:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:24:33,207 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:24:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:24:33,208 INFO L225 Difference]: With dead ends: 441 [2020-10-15 16:24:33,208 INFO L226 Difference]: Without dead ends: 436 [2020-10-15 16:24:33,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:24:33,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-15 16:24:33,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 333. [2020-10-15 16:24:33,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-15 16:24:33,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 897 transitions. [2020-10-15 16:24:33,214 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 897 transitions. Word has length 15 [2020-10-15 16:24:33,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:24:33,221 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 897 transitions. [2020-10-15 16:24:33,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:24:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 897 transitions. [2020-10-15 16:24:33,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:24:33,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:24:33,222 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:24:33,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:33,423 INFO L429 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:24:33,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:24:33,423 INFO L82 PathProgramCache]: Analyzing trace with hash 519936191, now seen corresponding path program 249 times [2020-10-15 16:24:33,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:24:33,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333770667] [2020-10-15 16:24:33,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:24:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:24:33,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:33,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333770667] [2020-10-15 16:24:33,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476679834] [2020-10-15 16:24:33,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:24:33,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:24:33,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:24:33,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:24:33,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:24:50,294 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-15 16:24:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:24:56,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:24:56,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:24:56,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593842548] [2020-10-15 16:24:56,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:24:56,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:24:56,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:24:56,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=234, Unknown=3, NotChecked=0, Total=342 [2020-10-15 16:24:56,105 INFO L87 Difference]: Start difference. First operand 333 states and 897 transitions. Second operand 19 states. [2020-10-15 16:25:00,554 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:25:13,686 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-10-15 16:25:16,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:16,143 INFO L93 Difference]: Finished difference Result 455 states and 1144 transitions. [2020-10-15 16:25:16,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:25:16,147 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:16,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:16,148 INFO L225 Difference]: With dead ends: 455 [2020-10-15 16:25:16,148 INFO L226 Difference]: Without dead ends: 450 [2020-10-15 16:25:16,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=253, Invalid=497, Unknown=6, NotChecked=0, Total=756 [2020-10-15 16:25:16,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-10-15 16:25:16,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 334. [2020-10-15 16:25:16,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-15 16:25:16,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 900 transitions. [2020-10-15 16:25:16,154 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 900 transitions. Word has length 15 [2020-10-15 16:25:16,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:16,154 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 900 transitions. [2020-10-15 16:25:16,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:16,154 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 900 transitions. [2020-10-15 16:25:16,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:16,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:16,154 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:16,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:16,355 INFO L429 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:16,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:16,356 INFO L82 PathProgramCache]: Analyzing trace with hash 520830882, now seen corresponding path program 250 times [2020-10-15 16:25:16,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:16,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130909932] [2020-10-15 16:25:16,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:16,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130909932] [2020-10-15 16:25:16,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7045608] [2020-10-15 16:25:16,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:16,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:25:16,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:16,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:16,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:19,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:19,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:19,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22560319] [2020-10-15 16:25:19,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:19,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:19,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:19,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:19,215 INFO L87 Difference]: Start difference. First operand 334 states and 900 transitions. Second operand 19 states. [2020-10-15 16:25:20,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:20,309 INFO L93 Difference]: Finished difference Result 464 states and 1169 transitions. [2020-10-15 16:25:20,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:25:20,311 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:20,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:20,313 INFO L225 Difference]: With dead ends: 464 [2020-10-15 16:25:20,313 INFO L226 Difference]: Without dead ends: 458 [2020-10-15 16:25:20,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:25:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-10-15 16:25:20,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 334. [2020-10-15 16:25:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-15 16:25:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 900 transitions. [2020-10-15 16:25:20,318 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 900 transitions. Word has length 15 [2020-10-15 16:25:20,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:20,318 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 900 transitions. [2020-10-15 16:25:20,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:20,318 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 900 transitions. [2020-10-15 16:25:20,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:20,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:20,319 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:20,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:20,520 INFO L429 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:20,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:20,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1378780930, now seen corresponding path program 251 times [2020-10-15 16:25:20,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:20,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738620137] [2020-10-15 16:25:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:20,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:20,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738620137] [2020-10-15 16:25:20,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898351549] [2020-10-15 16:25:20,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:20,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:25:20,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:20,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:20,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:21,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:21,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:21,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:21,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349164859] [2020-10-15 16:25:21,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:21,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:21,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:21,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:21,322 INFO L87 Difference]: Start difference. First operand 334 states and 900 transitions. Second operand 19 states. [2020-10-15 16:25:22,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:22,450 INFO L93 Difference]: Finished difference Result 414 states and 1047 transitions. [2020-10-15 16:25:22,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:25:22,452 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:22,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:22,453 INFO L225 Difference]: With dead ends: 414 [2020-10-15 16:25:22,454 INFO L226 Difference]: Without dead ends: 411 [2020-10-15 16:25:22,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:25:22,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-15 16:25:22,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 338. [2020-10-15 16:25:22,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-15 16:25:22,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 912 transitions. [2020-10-15 16:25:22,467 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 912 transitions. Word has length 15 [2020-10-15 16:25:22,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:22,467 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 912 transitions. [2020-10-15 16:25:22,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:22,467 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 912 transitions. [2020-10-15 16:25:22,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:22,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:22,468 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:22,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:22,669 INFO L429 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:22,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:22,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1378781891, now seen corresponding path program 252 times [2020-10-15 16:25:22,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:22,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084704673] [2020-10-15 16:25:22,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:22,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084704673] [2020-10-15 16:25:22,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553849927] [2020-10-15 16:25:22,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:22,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:25:22,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:22,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:22,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:23,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:23,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:23,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921730051] [2020-10-15 16:25:23,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:23,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:23,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:23,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:23,535 INFO L87 Difference]: Start difference. First operand 338 states and 912 transitions. Second operand 19 states. [2020-10-15 16:25:24,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:24,620 INFO L93 Difference]: Finished difference Result 441 states and 1109 transitions. [2020-10-15 16:25:24,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:25:24,623 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:24,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:24,625 INFO L225 Difference]: With dead ends: 441 [2020-10-15 16:25:24,625 INFO L226 Difference]: Without dead ends: 437 [2020-10-15 16:25:24,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:25:24,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-15 16:25:24,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 337. [2020-10-15 16:25:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-15 16:25:24,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 909 transitions. [2020-10-15 16:25:24,631 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 909 transitions. Word has length 15 [2020-10-15 16:25:24,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:24,631 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 909 transitions. [2020-10-15 16:25:24,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:24,631 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 909 transitions. [2020-10-15 16:25:24,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:24,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:24,632 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:24,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-10-15 16:25:24,833 INFO L429 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:24,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:24,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1378810721, now seen corresponding path program 253 times [2020-10-15 16:25:24,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:24,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882301091] [2020-10-15 16:25:24,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:25,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882301091] [2020-10-15 16:25:25,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561110603] [2020-10-15 16:25:25,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:25,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:25,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:25,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:25,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:25,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659019657] [2020-10-15 16:25:25,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:25,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:25,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:25,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:25,957 INFO L87 Difference]: Start difference. First operand 337 states and 909 transitions. Second operand 19 states. [2020-10-15 16:25:26,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:26,944 INFO L93 Difference]: Finished difference Result 454 states and 1141 transitions. [2020-10-15 16:25:26,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:25:26,948 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:26,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:26,949 INFO L225 Difference]: With dead ends: 454 [2020-10-15 16:25:26,949 INFO L226 Difference]: Without dead ends: 449 [2020-10-15 16:25:26,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:25:26,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-10-15 16:25:26,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 336. [2020-10-15 16:25:26,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-15 16:25:26,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 906 transitions. [2020-10-15 16:25:26,954 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 906 transitions. Word has length 15 [2020-10-15 16:25:26,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:26,954 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 906 transitions. [2020-10-15 16:25:26,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 906 transitions. [2020-10-15 16:25:26,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:26,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:26,955 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:27,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-10-15 16:25:27,156 INFO L429 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:27,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:27,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1379704451, now seen corresponding path program 254 times [2020-10-15 16:25:27,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:27,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884475976] [2020-10-15 16:25:27,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:27,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884475976] [2020-10-15 16:25:27,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114732114] [2020-10-15 16:25:27,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:27,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:25:27,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:27,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:27,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:28,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:28,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:28,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812489606] [2020-10-15 16:25:28,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:28,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:28,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:28,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:28,035 INFO L87 Difference]: Start difference. First operand 336 states and 906 transitions. Second operand 19 states. [2020-10-15 16:25:29,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:29,090 INFO L93 Difference]: Finished difference Result 464 states and 1163 transitions. [2020-10-15 16:25:29,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:25:29,092 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:29,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:29,093 INFO L225 Difference]: With dead ends: 464 [2020-10-15 16:25:29,093 INFO L226 Difference]: Without dead ends: 459 [2020-10-15 16:25:29,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:25:29,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-10-15 16:25:29,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 341. [2020-10-15 16:25:29,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-15 16:25:29,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 921 transitions. [2020-10-15 16:25:29,099 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 921 transitions. Word has length 15 [2020-10-15 16:25:29,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:29,099 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 921 transitions. [2020-10-15 16:25:29,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:29,099 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 921 transitions. [2020-10-15 16:25:29,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:29,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:29,100 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:29,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-10-15 16:25:29,300 INFO L429 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:29,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:29,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1379705412, now seen corresponding path program 255 times [2020-10-15 16:25:29,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:29,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040910449] [2020-10-15 16:25:29,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:29,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040910449] [2020-10-15 16:25:29,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105395496] [2020-10-15 16:25:29,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:29,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:25:29,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:29,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:29,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:30,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:30,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:30,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709876954] [2020-10-15 16:25:30,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:30,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:30,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:30,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:30,091 INFO L87 Difference]: Start difference. First operand 341 states and 921 transitions. Second operand 19 states. [2020-10-15 16:25:30,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:30,971 INFO L93 Difference]: Finished difference Result 475 states and 1194 transitions. [2020-10-15 16:25:30,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:25:30,973 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:30,975 INFO L225 Difference]: With dead ends: 475 [2020-10-15 16:25:30,975 INFO L226 Difference]: Without dead ends: 469 [2020-10-15 16:25:30,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:25:30,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-10-15 16:25:30,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 342. [2020-10-15 16:25:30,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-10-15 16:25:30,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 924 transitions. [2020-10-15 16:25:30,987 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 924 transitions. Word has length 15 [2020-10-15 16:25:30,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:30,987 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 924 transitions. [2020-10-15 16:25:30,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:30,987 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 924 transitions. [2020-10-15 16:25:30,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:30,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:30,988 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:31,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:31,188 INFO L429 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:31,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:31,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1379734242, now seen corresponding path program 256 times [2020-10-15 16:25:31,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:31,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268567911] [2020-10-15 16:25:31,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:31,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268567911] [2020-10-15 16:25:31,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193311286] [2020-10-15 16:25:31,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:31,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:25:31,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:31,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:31,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:31,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:31,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:31,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062865455] [2020-10-15 16:25:31,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:31,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:31,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:31,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:31,993 INFO L87 Difference]: Start difference. First operand 342 states and 924 transitions. Second operand 19 states. [2020-10-15 16:25:33,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:33,131 INFO L93 Difference]: Finished difference Result 474 states and 1199 transitions. [2020-10-15 16:25:33,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:25:33,135 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:33,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:33,137 INFO L225 Difference]: With dead ends: 474 [2020-10-15 16:25:33,137 INFO L226 Difference]: Without dead ends: 468 [2020-10-15 16:25:33,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:25:33,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-10-15 16:25:33,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 340. [2020-10-15 16:25:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-15 16:25:33,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 918 transitions. [2020-10-15 16:25:33,142 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 918 transitions. Word has length 15 [2020-10-15 16:25:33,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:33,142 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 918 transitions. [2020-10-15 16:25:33,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:33,142 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 918 transitions. [2020-10-15 16:25:33,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:33,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:33,143 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:33,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2020-10-15 16:25:33,344 INFO L429 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:33,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:33,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1407411042, now seen corresponding path program 257 times [2020-10-15 16:25:33,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:33,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222867707] [2020-10-15 16:25:33,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:33,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222867707] [2020-10-15 16:25:33,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745577690] [2020-10-15 16:25:33,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:33,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:25:33,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:33,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:33,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:34,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:34,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:34,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364910209] [2020-10-15 16:25:34,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:34,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:34,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:34,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:34,276 INFO L87 Difference]: Start difference. First operand 340 states and 918 transitions. Second operand 19 states. [2020-10-15 16:25:35,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:35,773 INFO L93 Difference]: Finished difference Result 478 states and 1207 transitions. [2020-10-15 16:25:35,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:25:35,775 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:35,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:35,776 INFO L225 Difference]: With dead ends: 478 [2020-10-15 16:25:35,776 INFO L226 Difference]: Without dead ends: 472 [2020-10-15 16:25:35,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:25:35,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-10-15 16:25:35,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 340. [2020-10-15 16:25:35,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-15 16:25:35,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 918 transitions. [2020-10-15 16:25:35,781 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 918 transitions. Word has length 15 [2020-10-15 16:25:35,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:35,781 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 918 transitions. [2020-10-15 16:25:35,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:35,781 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 918 transitions. [2020-10-15 16:25:35,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:35,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:35,782 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:35,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2020-10-15 16:25:35,983 INFO L429 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:35,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1407439872, now seen corresponding path program 258 times [2020-10-15 16:25:35,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:35,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874043763] [2020-10-15 16:25:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:36,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874043763] [2020-10-15 16:25:36,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778137084] [2020-10-15 16:25:36,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:36,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:25:36,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:36,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:36,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:41,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:41,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:41,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088536417] [2020-10-15 16:25:41,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:41,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:41,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:41,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-10-15 16:25:41,390 INFO L87 Difference]: Start difference. First operand 340 states and 918 transitions. Second operand 19 states. [2020-10-15 16:25:45,906 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-15 16:25:50,250 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-15 16:25:52,927 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-15 16:25:53,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:53,422 INFO L93 Difference]: Finished difference Result 461 states and 1164 transitions. [2020-10-15 16:25:53,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:25:53,426 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:53,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:53,427 INFO L225 Difference]: With dead ends: 461 [2020-10-15 16:25:53,427 INFO L226 Difference]: Without dead ends: 456 [2020-10-15 16:25:53,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-10-15 16:25:53,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-10-15 16:25:53,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 338. [2020-10-15 16:25:53,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-15 16:25:53,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 912 transitions. [2020-10-15 16:25:53,433 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 912 transitions. Word has length 15 [2020-10-15 16:25:53,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:53,433 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 912 transitions. [2020-10-15 16:25:53,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:53,433 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 912 transitions. [2020-10-15 16:25:53,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:53,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:53,434 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:53,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:53,635 INFO L429 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:53,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:53,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1408364354, now seen corresponding path program 259 times [2020-10-15 16:25:53,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:53,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795004140] [2020-10-15 16:25:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:53,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795004140] [2020-10-15 16:25:53,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001487662] [2020-10-15 16:25:53,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:53,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:53,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:54,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:54,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:54,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766545479] [2020-10-15 16:25:54,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:54,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:54,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:54,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:54,470 INFO L87 Difference]: Start difference. First operand 338 states and 912 transitions. Second operand 19 states. [2020-10-15 16:25:55,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:55,472 INFO L93 Difference]: Finished difference Result 438 states and 1112 transitions. [2020-10-15 16:25:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:25:55,476 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:55,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:55,477 INFO L225 Difference]: With dead ends: 438 [2020-10-15 16:25:55,477 INFO L226 Difference]: Without dead ends: 417 [2020-10-15 16:25:55,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:25:55,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-15 16:25:55,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 339. [2020-10-15 16:25:55,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-15 16:25:55,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 907 transitions. [2020-10-15 16:25:55,482 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 907 transitions. Word has length 15 [2020-10-15 16:25:55,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:55,482 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 907 transitions. [2020-10-15 16:25:55,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:55,482 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 907 transitions. [2020-10-15 16:25:55,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:55,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:55,482 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:55,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:55,683 INFO L429 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:55,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:55,684 INFO L82 PathProgramCache]: Analyzing trace with hash -2060879712, now seen corresponding path program 260 times [2020-10-15 16:25:55,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:55,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867824489] [2020-10-15 16:25:55,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:55,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867824489] [2020-10-15 16:25:55,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136510348] [2020-10-15 16:25:55,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:56,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:25:56,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:56,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:56,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:56,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:56,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:56,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648762777] [2020-10-15 16:25:56,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:56,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:56,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:56,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:56,454 INFO L87 Difference]: Start difference. First operand 339 states and 907 transitions. Second operand 19 states. [2020-10-15 16:25:57,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:57,298 INFO L93 Difference]: Finished difference Result 406 states and 1029 transitions. [2020-10-15 16:25:57,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 16:25:57,302 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:57,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:57,303 INFO L225 Difference]: With dead ends: 406 [2020-10-15 16:25:57,303 INFO L226 Difference]: Without dead ends: 403 [2020-10-15 16:25:57,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:25:57,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-15 16:25:57,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 345. [2020-10-15 16:25:57,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-15 16:25:57,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 923 transitions. [2020-10-15 16:25:57,310 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 923 transitions. Word has length 15 [2020-10-15 16:25:57,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:57,310 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 923 transitions. [2020-10-15 16:25:57,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:57,310 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 923 transitions. [2020-10-15 16:25:57,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:57,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:57,311 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:57,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:57,511 INFO L429 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:57,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:57,512 INFO L82 PathProgramCache]: Analyzing trace with hash -2060878751, now seen corresponding path program 261 times [2020-10-15 16:25:57,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:57,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182652328] [2020-10-15 16:25:57,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:57,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182652328] [2020-10-15 16:25:57,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74067584] [2020-10-15 16:25:57,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:57,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:25:57,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:57,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:57,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:25:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:58,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:25:58,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:25:58,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097708484] [2020-10-15 16:25:58,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:25:58,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:25:58,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:25:58,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:25:58,319 INFO L87 Difference]: Start difference. First operand 345 states and 923 transitions. Second operand 19 states. [2020-10-15 16:25:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:25:59,202 INFO L93 Difference]: Finished difference Result 436 states and 1098 transitions. [2020-10-15 16:25:59,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:25:59,207 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:25:59,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:25:59,208 INFO L225 Difference]: With dead ends: 436 [2020-10-15 16:25:59,208 INFO L226 Difference]: Without dead ends: 432 [2020-10-15 16:25:59,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:25:59,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-15 16:25:59,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 344. [2020-10-15 16:25:59,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-15 16:25:59,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 920 transitions. [2020-10-15 16:25:59,214 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 920 transitions. Word has length 15 [2020-10-15 16:25:59,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:25:59,214 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 920 transitions. [2020-10-15 16:25:59,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:25:59,214 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 920 transitions. [2020-10-15 16:25:59,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:25:59,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:25:59,215 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:25:59,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable296 [2020-10-15 16:25:59,415 INFO L429 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:25:59,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:25:59,416 INFO L82 PathProgramCache]: Analyzing trace with hash -2060849921, now seen corresponding path program 262 times [2020-10-15 16:25:59,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:25:59,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081117369] [2020-10-15 16:25:59,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:25:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:25:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:25:59,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081117369] [2020-10-15 16:25:59,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220813652] [2020-10-15 16:25:59,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:25:59,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:25:59,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:25:59,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:25:59,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:02,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:02,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:02,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049478326] [2020-10-15 16:26:02,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:02,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:02,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:02,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:02,422 INFO L87 Difference]: Start difference. First operand 344 states and 920 transitions. Second operand 19 states. [2020-10-15 16:26:03,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:03,454 INFO L93 Difference]: Finished difference Result 452 states and 1133 transitions. [2020-10-15 16:26:03,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:26:03,457 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:03,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:03,458 INFO L225 Difference]: With dead ends: 452 [2020-10-15 16:26:03,458 INFO L226 Difference]: Without dead ends: 447 [2020-10-15 16:26:03,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:26:03,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-15 16:26:03,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 343. [2020-10-15 16:26:03,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-15 16:26:03,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 917 transitions. [2020-10-15 16:26:03,463 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 917 transitions. Word has length 15 [2020-10-15 16:26:03,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:03,463 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 917 transitions. [2020-10-15 16:26:03,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:03,463 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 917 transitions. [2020-10-15 16:26:03,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:03,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:03,464 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:03,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:03,667 INFO L429 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:03,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:03,667 INFO L82 PathProgramCache]: Analyzing trace with hash -2059956191, now seen corresponding path program 263 times [2020-10-15 16:26:03,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:03,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266111170] [2020-10-15 16:26:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:03,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266111170] [2020-10-15 16:26:03,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472540984] [2020-10-15 16:26:03,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:04,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:26:04,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:04,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:04,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:04,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:04,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:04,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878963527] [2020-10-15 16:26:04,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:04,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:04,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:04,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:04,550 INFO L87 Difference]: Start difference. First operand 343 states and 917 transitions. Second operand 19 states. [2020-10-15 16:26:05,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:05,857 INFO L93 Difference]: Finished difference Result 451 states and 1130 transitions. [2020-10-15 16:26:05,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:26:05,861 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:05,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:05,862 INFO L225 Difference]: With dead ends: 451 [2020-10-15 16:26:05,862 INFO L226 Difference]: Without dead ends: 446 [2020-10-15 16:26:05,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:26:05,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-15 16:26:05,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 350. [2020-10-15 16:26:05,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-15 16:26:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 936 transitions. [2020-10-15 16:26:05,868 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 936 transitions. Word has length 15 [2020-10-15 16:26:05,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:05,868 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 936 transitions. [2020-10-15 16:26:05,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:05,868 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 936 transitions. [2020-10-15 16:26:05,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:05,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:05,869 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:06,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2020-10-15 16:26:06,070 INFO L429 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:06,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:06,070 INFO L82 PathProgramCache]: Analyzing trace with hash -2059955230, now seen corresponding path program 264 times [2020-10-15 16:26:06,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:06,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876668712] [2020-10-15 16:26:06,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:06,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876668712] [2020-10-15 16:26:06,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911017615] [2020-10-15 16:26:06,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:06,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:26:06,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:06,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:06,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:13,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:13,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:13,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065196405] [2020-10-15 16:26:13,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:13,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:13,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:13,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-10-15 16:26:13,312 INFO L87 Difference]: Start difference. First operand 350 states and 936 transitions. Second operand 19 states. [2020-10-15 16:26:18,053 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-15 16:26:22,303 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-15 16:26:24,799 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-15 16:26:25,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:25,508 INFO L93 Difference]: Finished difference Result 481 states and 1200 transitions. [2020-10-15 16:26:25,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:26:25,512 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:25,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:25,513 INFO L225 Difference]: With dead ends: 481 [2020-10-15 16:26:25,513 INFO L226 Difference]: Without dead ends: 475 [2020-10-15 16:26:25,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-10-15 16:26:25,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-15 16:26:25,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 353. [2020-10-15 16:26:25,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-15 16:26:25,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 945 transitions. [2020-10-15 16:26:25,521 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 945 transitions. Word has length 15 [2020-10-15 16:26:25,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:25,521 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 945 transitions. [2020-10-15 16:26:25,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:25,522 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 945 transitions. [2020-10-15 16:26:25,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:25,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:25,522 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:25,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-10-15 16:26:25,738 INFO L429 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:25,738 INFO L82 PathProgramCache]: Analyzing trace with hash -2059926400, now seen corresponding path program 265 times [2020-10-15 16:26:25,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:25,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712473049] [2020-10-15 16:26:25,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:26,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712473049] [2020-10-15 16:26:26,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908034999] [2020-10-15 16:26:26,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:26,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:26,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:26,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:26,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:26,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:26,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557257947] [2020-10-15 16:26:26,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:26,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:26,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:26,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:26,818 INFO L87 Difference]: Start difference. First operand 353 states and 945 transitions. Second operand 19 states. [2020-10-15 16:26:28,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:28,489 INFO L93 Difference]: Finished difference Result 482 states and 1207 transitions. [2020-10-15 16:26:28,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:26:28,493 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:28,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:28,494 INFO L225 Difference]: With dead ends: 482 [2020-10-15 16:26:28,494 INFO L226 Difference]: Without dead ends: 476 [2020-10-15 16:26:28,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 16:26:28,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-10-15 16:26:28,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 351. [2020-10-15 16:26:28,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-15 16:26:28,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 939 transitions. [2020-10-15 16:26:28,501 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 939 transitions. Word has length 15 [2020-10-15 16:26:28,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:28,501 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 939 transitions. [2020-10-15 16:26:28,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:28,501 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 939 transitions. [2020-10-15 16:26:28,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:28,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:28,502 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:28,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-10-15 16:26:28,703 INFO L429 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:28,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:28,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2032250561, now seen corresponding path program 266 times [2020-10-15 16:26:28,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:28,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940457730] [2020-10-15 16:26:28,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:29,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:29,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940457730] [2020-10-15 16:26:29,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909866056] [2020-10-15 16:26:29,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:29,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:26:29,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:29,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:29,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:29,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:29,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:29,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748115671] [2020-10-15 16:26:29,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:29,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:29,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:29,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:29,481 INFO L87 Difference]: Start difference. First operand 351 states and 939 transitions. Second operand 19 states. [2020-10-15 16:26:30,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:30,651 INFO L93 Difference]: Finished difference Result 460 states and 1154 transitions. [2020-10-15 16:26:30,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:26:30,654 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:30,655 INFO L225 Difference]: With dead ends: 460 [2020-10-15 16:26:30,655 INFO L226 Difference]: Without dead ends: 455 [2020-10-15 16:26:30,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:26:30,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-10-15 16:26:30,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 356. [2020-10-15 16:26:30,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-15 16:26:30,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 952 transitions. [2020-10-15 16:26:30,661 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 952 transitions. Word has length 15 [2020-10-15 16:26:30,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:30,661 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 952 transitions. [2020-10-15 16:26:30,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 952 transitions. [2020-10-15 16:26:30,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:30,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:30,662 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:30,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-10-15 16:26:30,862 INFO L429 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:30,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:30,863 INFO L82 PathProgramCache]: Analyzing trace with hash -2032220770, now seen corresponding path program 267 times [2020-10-15 16:26:30,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:30,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404976320] [2020-10-15 16:26:30,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:31,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404976320] [2020-10-15 16:26:31,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275701281] [2020-10-15 16:26:31,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:31,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:26:31,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:31,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:31,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:31,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:31,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:31,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953583701] [2020-10-15 16:26:31,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:31,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:31,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:31,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:31,604 INFO L87 Difference]: Start difference. First operand 356 states and 952 transitions. Second operand 19 states. [2020-10-15 16:26:32,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:32,596 INFO L93 Difference]: Finished difference Result 481 states and 1200 transitions. [2020-10-15 16:26:32,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:26:32,599 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:32,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:32,601 INFO L225 Difference]: With dead ends: 481 [2020-10-15 16:26:32,601 INFO L226 Difference]: Without dead ends: 475 [2020-10-15 16:26:32,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:26:32,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-15 16:26:32,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 354. [2020-10-15 16:26:32,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-15 16:26:32,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 946 transitions. [2020-10-15 16:26:32,606 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 946 transitions. Word has length 15 [2020-10-15 16:26:32,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:32,607 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 946 transitions. [2020-10-15 16:26:32,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:32,607 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 946 transitions. [2020-10-15 16:26:32,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:32,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:32,607 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:32,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2020-10-15 16:26:32,808 INFO L429 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:32,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:32,809 INFO L82 PathProgramCache]: Analyzing trace with hash -2031296288, now seen corresponding path program 268 times [2020-10-15 16:26:32,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:32,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398843680] [2020-10-15 16:26:32,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:33,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398843680] [2020-10-15 16:26:33,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226012240] [2020-10-15 16:26:33,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:33,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:26:33,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:33,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:33,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:33,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:33,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:33,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354969653] [2020-10-15 16:26:33,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:33,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:33,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:33,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:33,689 INFO L87 Difference]: Start difference. First operand 354 states and 946 transitions. Second operand 19 states. [2020-10-15 16:26:34,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:34,875 INFO L93 Difference]: Finished difference Result 442 states and 1116 transitions. [2020-10-15 16:26:34,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:26:34,878 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:34,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:34,879 INFO L225 Difference]: With dead ends: 442 [2020-10-15 16:26:34,879 INFO L226 Difference]: Without dead ends: 423 [2020-10-15 16:26:34,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:26:34,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-15 16:26:34,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 352. [2020-10-15 16:26:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-15 16:26:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 940 transitions. [2020-10-15 16:26:34,885 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 940 transitions. Word has length 15 [2020-10-15 16:26:34,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:34,885 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 940 transitions. [2020-10-15 16:26:34,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:34,885 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 940 transitions. [2020-10-15 16:26:34,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:34,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:34,886 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:35,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-10-15 16:26:35,086 INFO L429 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:35,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:35,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1173375070, now seen corresponding path program 269 times [2020-10-15 16:26:35,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:35,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084135993] [2020-10-15 16:26:35,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:35,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084135993] [2020-10-15 16:26:35,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694227316] [2020-10-15 16:26:35,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:35,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 16:26:35,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:35,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:35,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:36,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:36,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:36,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035820715] [2020-10-15 16:26:36,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:36,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:36,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:36,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:36,107 INFO L87 Difference]: Start difference. First operand 352 states and 940 transitions. Second operand 19 states. [2020-10-15 16:26:36,337 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-15 16:26:37,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:37,328 INFO L93 Difference]: Finished difference Result 456 states and 1147 transitions. [2020-10-15 16:26:37,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 16:26:37,332 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:37,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:37,333 INFO L225 Difference]: With dead ends: 456 [2020-10-15 16:26:37,333 INFO L226 Difference]: Without dead ends: 450 [2020-10-15 16:26:37,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-15 16:26:37,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-10-15 16:26:37,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 350. [2020-10-15 16:26:37,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-15 16:26:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 934 transitions. [2020-10-15 16:26:37,339 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 934 transitions. Word has length 15 [2020-10-15 16:26:37,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:37,339 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 934 transitions. [2020-10-15 16:26:37,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:37,339 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 934 transitions. [2020-10-15 16:26:37,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:37,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:37,340 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:37,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2020-10-15 16:26:37,540 INFO L429 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:37,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:37,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1173345279, now seen corresponding path program 270 times [2020-10-15 16:26:37,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:37,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201167320] [2020-10-15 16:26:37,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:37,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201167320] [2020-10-15 16:26:37,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520210324] [2020-10-15 16:26:37,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:37,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 16:26:37,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:37,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:37,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:40,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:40,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:40,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905199632] [2020-10-15 16:26:40,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:40,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:40,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:40,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:40,565 INFO L87 Difference]: Start difference. First operand 350 states and 934 transitions. Second operand 19 states. [2020-10-15 16:26:40,857 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-15 16:26:42,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:42,196 INFO L93 Difference]: Finished difference Result 466 states and 1163 transitions. [2020-10-15 16:26:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 16:26:42,200 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:42,201 INFO L225 Difference]: With dead ends: 466 [2020-10-15 16:26:42,202 INFO L226 Difference]: Without dead ends: 446 [2020-10-15 16:26:42,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=291, Invalid=579, Unknown=0, NotChecked=0, Total=870 [2020-10-15 16:26:42,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-15 16:26:42,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 345. [2020-10-15 16:26:42,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-15 16:26:42,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 919 transitions. [2020-10-15 16:26:42,214 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 919 transitions. Word has length 15 [2020-10-15 16:26:42,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:42,214 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 919 transitions. [2020-10-15 16:26:42,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:42,214 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 919 transitions. [2020-10-15 16:26:42,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:42,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:42,215 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:42,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:42,415 INFO L429 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:42,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:42,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1143823359, now seen corresponding path program 271 times [2020-10-15 16:26:42,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:42,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320028077] [2020-10-15 16:26:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:42,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320028077] [2020-10-15 16:26:42,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725118586] [2020-10-15 16:26:42,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:42,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:42,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:43,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:43,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:43,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124480118] [2020-10-15 16:26:43,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:43,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:43,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:43,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:43,499 INFO L87 Difference]: Start difference. First operand 345 states and 919 transitions. Second operand 19 states. [2020-10-15 16:26:44,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:44,275 INFO L93 Difference]: Finished difference Result 437 states and 1106 transitions. [2020-10-15 16:26:44,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:26:44,279 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:44,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:44,280 INFO L225 Difference]: With dead ends: 437 [2020-10-15 16:26:44,280 INFO L226 Difference]: Without dead ends: 422 [2020-10-15 16:26:44,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=214, Invalid=436, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:26:44,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-15 16:26:44,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 350. [2020-10-15 16:26:44,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-15 16:26:44,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 928 transitions. [2020-10-15 16:26:44,286 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 928 transitions. Word has length 15 [2020-10-15 16:26:44,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:44,286 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 928 transitions. [2020-10-15 16:26:44,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:44,286 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 928 transitions. [2020-10-15 16:26:44,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:44,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:44,286 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:44,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2020-10-15 16:26:44,487 INFO L429 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:44,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:44,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1143822398, now seen corresponding path program 272 times [2020-10-15 16:26:44,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:44,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685816443] [2020-10-15 16:26:44,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:44,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685816443] [2020-10-15 16:26:44,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588475496] [2020-10-15 16:26:44,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:45,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:26:45,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:45,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:45,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:45,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:45,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:45,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620232651] [2020-10-15 16:26:45,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:45,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:45,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:45,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:45,547 INFO L87 Difference]: Start difference. First operand 350 states and 928 transitions. Second operand 19 states. [2020-10-15 16:26:46,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:46,537 INFO L93 Difference]: Finished difference Result 433 states and 1087 transitions. [2020-10-15 16:26:46,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 16:26:46,541 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:46,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:46,542 INFO L225 Difference]: With dead ends: 433 [2020-10-15 16:26:46,542 INFO L226 Difference]: Without dead ends: 417 [2020-10-15 16:26:46,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:26:46,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-15 16:26:46,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 349. [2020-10-15 16:26:46,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-15 16:26:46,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 925 transitions. [2020-10-15 16:26:46,548 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 925 transitions. Word has length 15 [2020-10-15 16:26:46,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:46,548 INFO L481 AbstractCegarLoop]: Abstraction has 349 states and 925 transitions. [2020-10-15 16:26:46,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:46,548 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 925 transitions. [2020-10-15 16:26:46,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:46,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:46,548 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:46,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:46,749 INFO L429 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:46,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:46,750 INFO L82 PathProgramCache]: Analyzing trace with hash 439565519, now seen corresponding path program 273 times [2020-10-15 16:26:46,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:46,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619353674] [2020-10-15 16:26:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:47,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619353674] [2020-10-15 16:26:47,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368813305] [2020-10-15 16:26:47,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:47,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 16:26:47,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:47,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:47,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:47,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:47,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:47,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115120015] [2020-10-15 16:26:47,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:47,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:47,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:47,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:47,842 INFO L87 Difference]: Start difference. First operand 349 states and 925 transitions. Second operand 19 states. [2020-10-15 16:26:48,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:48,092 INFO L93 Difference]: Finished difference Result 394 states and 1001 transitions. [2020-10-15 16:26:48,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 16:26:48,096 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:48,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:48,097 INFO L225 Difference]: With dead ends: 394 [2020-10-15 16:26:48,097 INFO L226 Difference]: Without dead ends: 392 [2020-10-15 16:26:48,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-10-15 16:26:48,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-10-15 16:26:48,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 357. [2020-10-15 16:26:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-15 16:26:48,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 949 transitions. [2020-10-15 16:26:48,103 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 949 transitions. Word has length 15 [2020-10-15 16:26:48,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:48,103 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 949 transitions. [2020-10-15 16:26:48,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:48,103 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 949 transitions. [2020-10-15 16:26:48,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:48,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:48,103 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:48,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:48,304 INFO L429 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:48,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:48,305 INFO L82 PathProgramCache]: Analyzing trace with hash 439566480, now seen corresponding path program 274 times [2020-10-15 16:26:48,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:48,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796980421] [2020-10-15 16:26:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:48,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796980421] [2020-10-15 16:26:48,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147067998] [2020-10-15 16:26:48,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:48,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:26:48,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:48,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:48,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:49,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:49,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:49,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875290983] [2020-10-15 16:26:49,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:49,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:49,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:49,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:49,416 INFO L87 Difference]: Start difference. First operand 357 states and 949 transitions. Second operand 19 states. [2020-10-15 16:26:50,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:50,233 INFO L93 Difference]: Finished difference Result 420 states and 1064 transitions. [2020-10-15 16:26:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:26:50,236 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:50,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:50,237 INFO L225 Difference]: With dead ends: 420 [2020-10-15 16:26:50,237 INFO L226 Difference]: Without dead ends: 417 [2020-10-15 16:26:50,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2020-10-15 16:26:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-15 16:26:50,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 355. [2020-10-15 16:26:50,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-15 16:26:50,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-15 16:26:50,243 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-15 16:26:50,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:50,243 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-15 16:26:50,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:50,243 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-15 16:26:50,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:50,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:50,244 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:50,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:50,446 INFO L429 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:50,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:50,447 INFO L82 PathProgramCache]: Analyzing trace with hash 439595310, now seen corresponding path program 275 times [2020-10-15 16:26:50,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:50,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830238003] [2020-10-15 16:26:50,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:50,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:50,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830238003] [2020-10-15 16:26:50,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653920885] [2020-10-15 16:26:50,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:50,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:26:50,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:50,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:50,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:26:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:53,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:26:53,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:26:53,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627581630] [2020-10-15 16:26:53,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:26:53,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:26:53,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:26:53,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:26:53,574 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-15 16:26:54,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:26:54,682 INFO L93 Difference]: Finished difference Result 452 states and 1140 transitions. [2020-10-15 16:26:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 16:26:54,684 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:26:54,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:26:54,685 INFO L225 Difference]: With dead ends: 452 [2020-10-15 16:26:54,685 INFO L226 Difference]: Without dead ends: 448 [2020-10-15 16:26:54,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 16:26:54,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-10-15 16:26:54,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 353. [2020-10-15 16:26:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-15 16:26:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 937 transitions. [2020-10-15 16:26:54,690 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 937 transitions. Word has length 15 [2020-10-15 16:26:54,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:26:54,690 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 937 transitions. [2020-10-15 16:26:54,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:26:54,690 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 937 transitions. [2020-10-15 16:26:54,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:26:54,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:26:54,690 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:26:54,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-10-15 16:26:54,891 INFO L429 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:26:54,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:26:54,892 INFO L82 PathProgramCache]: Analyzing trace with hash 440489040, now seen corresponding path program 276 times [2020-10-15 16:26:54,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:26:54,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016324074] [2020-10-15 16:26:54,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:26:54,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:26:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:26:55,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016324074] [2020-10-15 16:26:55,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487750888] [2020-10-15 16:26:55,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:26:55,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 16:26:55,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:26:55,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:26:55,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:02,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:02,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:27:02,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438214044] [2020-10-15 16:27:02,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:27:02,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:02,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:27:02,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:27:02,079 INFO L87 Difference]: Start difference. First operand 353 states and 937 transitions. Second operand 19 states. [2020-10-15 16:27:03,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:03,565 INFO L93 Difference]: Finished difference Result 446 states and 1118 transitions. [2020-10-15 16:27:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:27:03,569 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:27:03,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:03,570 INFO L225 Difference]: With dead ends: 446 [2020-10-15 16:27:03,570 INFO L226 Difference]: Without dead ends: 443 [2020-10-15 16:27:03,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:27:03,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-10-15 16:27:03,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 355. [2020-10-15 16:27:03,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-15 16:27:03,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-15 16:27:03,576 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-15 16:27:03,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:03,576 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-15 16:27:03,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:27:03,576 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-15 16:27:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:27:03,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:03,577 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:03,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-10-15 16:27:03,778 INFO L429 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:03,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:03,778 INFO L82 PathProgramCache]: Analyzing trace with hash 440490001, now seen corresponding path program 277 times [2020-10-15 16:27:03,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:03,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148161419] [2020-10-15 16:27:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:04,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148161419] [2020-10-15 16:27:04,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710448015] [2020-10-15 16:27:04,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:04,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:27:04,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:08,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:08,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:27:08,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449026077] [2020-10-15 16:27:08,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:27:08,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:08,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:27:08,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=251, Unknown=1, NotChecked=0, Total=342 [2020-10-15 16:27:08,949 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-15 16:27:13,490 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-15 16:27:14,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:14,578 INFO L93 Difference]: Finished difference Result 483 states and 1210 transitions. [2020-10-15 16:27:14,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:27:14,583 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:27:14,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:14,584 INFO L225 Difference]: With dead ends: 483 [2020-10-15 16:27:14,584 INFO L226 Difference]: Without dead ends: 478 [2020-10-15 16:27:14,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=256, Invalid=555, Unknown=1, NotChecked=0, Total=812 [2020-10-15 16:27:14,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-10-15 16:27:14,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 355. [2020-10-15 16:27:14,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-15 16:27:14,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-15 16:27:14,590 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-15 16:27:14,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:14,590 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-15 16:27:14,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:27:14,590 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-15 16:27:14,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:27:14,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:14,591 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:14,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-10-15 16:27:14,792 INFO L429 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:14,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:14,792 INFO L82 PathProgramCache]: Analyzing trace with hash 440518831, now seen corresponding path program 278 times [2020-10-15 16:27:14,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:14,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045965648] [2020-10-15 16:27:14,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:15,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045965648] [2020-10-15 16:27:15,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279696946] [2020-10-15 16:27:15,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:15,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 16:27:15,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:15,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:27:15,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:15,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:15,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:27:15,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069650728] [2020-10-15 16:27:15,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:27:15,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:15,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:27:15,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:27:15,963 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-15 16:27:17,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:17,446 INFO L93 Difference]: Finished difference Result 469 states and 1175 transitions. [2020-10-15 16:27:17,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 16:27:17,448 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:27:17,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:17,449 INFO L225 Difference]: With dead ends: 469 [2020-10-15 16:27:17,449 INFO L226 Difference]: Without dead ends: 465 [2020-10-15 16:27:17,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-10-15 16:27:17,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-15 16:27:17,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 351. [2020-10-15 16:27:17,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-15 16:27:17,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 931 transitions. [2020-10-15 16:27:17,454 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 931 transitions. Word has length 15 [2020-10-15 16:27:17,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:17,454 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 931 transitions. [2020-10-15 16:27:17,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:27:17,454 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 931 transitions. [2020-10-15 16:27:17,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:27:17,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:17,455 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:17,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2020-10-15 16:27:17,656 INFO L429 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:17,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:17,656 INFO L82 PathProgramCache]: Analyzing trace with hash 468194670, now seen corresponding path program 279 times [2020-10-15 16:27:17,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:17,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560380269] [2020-10-15 16:27:17,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:18,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560380269] [2020-10-15 16:27:18,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506211465] [2020-10-15 16:27:18,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:18,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 16:27:18,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:18,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:27:18,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:22,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:22,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:27:22,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803388316] [2020-10-15 16:27:22,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:27:22,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:22,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:27:22,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:27:22,895 INFO L87 Difference]: Start difference. First operand 351 states and 931 transitions. Second operand 19 states. [2020-10-15 16:27:24,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:24,668 INFO L93 Difference]: Finished difference Result 440 states and 1101 transitions. [2020-10-15 16:27:24,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:27:24,672 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:27:24,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:24,674 INFO L225 Difference]: With dead ends: 440 [2020-10-15 16:27:24,674 INFO L226 Difference]: Without dead ends: 437 [2020-10-15 16:27:24,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=312, Invalid=680, Unknown=0, NotChecked=0, Total=992 [2020-10-15 16:27:24,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-15 16:27:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 354. [2020-10-15 16:27:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-15 16:27:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 940 transitions. [2020-10-15 16:27:24,680 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 940 transitions. Word has length 15 [2020-10-15 16:27:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:24,681 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 940 transitions. [2020-10-15 16:27:24,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:27:24,681 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 940 transitions. [2020-10-15 16:27:24,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:27:24,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:24,682 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:24,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:24,883 INFO L429 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:24,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:24,884 INFO L82 PathProgramCache]: Analyzing trace with hash 468195631, now seen corresponding path program 280 times [2020-10-15 16:27:24,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:24,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075873324] [2020-10-15 16:27:24,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:25,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:25,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075873324] [2020-10-15 16:27:25,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857673259] [2020-10-15 16:27:25,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:25,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 16:27:25,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:25,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:27:25,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:26,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:26,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:27:26,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292923092] [2020-10-15 16:27:26,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:27:26,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:26,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:27:26,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-10-15 16:27:26,053 INFO L87 Difference]: Start difference. First operand 354 states and 940 transitions. Second operand 19 states. [2020-10-15 16:27:27,169 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-15 16:27:27,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 16:27:27,774 INFO L93 Difference]: Finished difference Result 478 states and 1194 transitions. [2020-10-15 16:27:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 16:27:27,779 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 16:27:27,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 16:27:27,780 INFO L225 Difference]: With dead ends: 478 [2020-10-15 16:27:27,780 INFO L226 Difference]: Without dead ends: 473 [2020-10-15 16:27:27,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2020-10-15 16:27:27,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-10-15 16:27:27,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 354. [2020-10-15 16:27:27,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-15 16:27:27,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 940 transitions. [2020-10-15 16:27:27,794 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 940 transitions. Word has length 15 [2020-10-15 16:27:27,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 16:27:27,794 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 940 transitions. [2020-10-15 16:27:27,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 16:27:27,795 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 940 transitions. [2020-10-15 16:27:27,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 16:27:27,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 16:27:27,796 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 16:27:28,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2020-10-15 16:27:28,010 INFO L429 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 16:27:28,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 16:27:28,010 INFO L82 PathProgramCache]: Analyzing trace with hash 468224461, now seen corresponding path program 281 times [2020-10-15 16:27:28,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 16:27:28,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3831456] [2020-10-15 16:27:28,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 16:27:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 16:27:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:28,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3831456] [2020-10-15 16:27:28,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35360970] [2020-10-15 16:27:28,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 16:27:28,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 16:27:28,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 16:27:28,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 16:27:28,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 16:27:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 16:27:41,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 16:27:41,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 16:27:41,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353100342] [2020-10-15 16:27:41,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 16:27:41,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 16:27:41,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 16:27:41,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=249, Unknown=4, NotChecked=0, Total=342 [2020-10-15 16:27:41,612 INFO L87 Difference]: Start difference. First operand 354 states and 940 transitions. Second operand 19 states. [2020-10-15 16:27:46,173 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 16:27:55,855 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 36 DAG size of output: 34 Received shutdown request... [2020-10-15 16:27:56,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 16:27:56,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2020-10-15 16:27:56,266 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-15 16:27:56,270 WARN L235 ceAbstractionStarter]: Timeout [2020-10-15 16:27:56,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 04:27:56 BasicIcfg [2020-10-15 16:27:56,270 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 16:27:56,271 INFO L168 Benchmark]: Toolchain (without parser) took 873880.02 ms. Allocated memory was 252.2 MB in the beginning and 230.2 MB in the end (delta: -22.0 MB). Free memory was 207.2 MB in the beginning and 175.3 MB in the end (delta: 31.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 14.2 GB. [2020-10-15 16:27:56,272 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 252.2 MB. Free memory is still 228.6 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 16:27:56,272 INFO L168 Benchmark]: CACSL2BoogieTranslator took 600.75 ms. Allocated memory was 252.2 MB in the beginning and 316.7 MB in the end (delta: 64.5 MB). Free memory was 207.2 MB in the beginning and 272.7 MB in the end (delta: -65.5 MB). Peak memory consumption was 32.7 MB. Max. memory is 14.2 GB. [2020-10-15 16:27:56,272 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.05 ms. Allocated memory is still 316.7 MB. Free memory was 272.7 MB in the beginning and 272.1 MB in the end (delta: 629.2 kB). Peak memory consumption was 629.2 kB. Max. memory is 14.2 GB. [2020-10-15 16:27:56,272 INFO L168 Benchmark]: Boogie Preprocessor took 28.96 ms. Allocated memory is still 316.7 MB. Free memory was 272.1 MB in the beginning and 269.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 16:27:56,272 INFO L168 Benchmark]: RCFGBuilder took 371.38 ms. Allocated memory is still 316.7 MB. Free memory was 269.6 MB in the beginning and 247.5 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 14.2 GB. [2020-10-15 16:27:56,273 INFO L168 Benchmark]: TraceAbstraction took 872825.12 ms. Allocated memory was 316.7 MB in the beginning and 230.2 MB in the end (delta: -86.5 MB). Free memory was 247.5 MB in the beginning and 175.3 MB in the end (delta: 72.2 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 16:27:56,275 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 252.2 MB. Free memory is still 228.6 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 600.75 ms. Allocated memory was 252.2 MB in the beginning and 316.7 MB in the end (delta: 64.5 MB). Free memory was 207.2 MB in the beginning and 272.7 MB in the end (delta: -65.5 MB). Peak memory consumption was 32.7 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 48.05 ms. Allocated memory is still 316.7 MB. Free memory was 272.7 MB in the beginning and 272.1 MB in the end (delta: 629.2 kB). Peak memory consumption was 629.2 kB. Max. memory is 14.2 GB. * Boogie Preprocessor took 28.96 ms. Allocated memory is still 316.7 MB. Free memory was 272.1 MB in the beginning and 269.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 371.38 ms. Allocated memory is still 316.7 MB. Free memory was 269.6 MB in the beginning and 247.5 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 14.2 GB. * TraceAbstraction took 872825.12 ms. Allocated memory was 316.7 MB in the beginning and 230.2 MB in the end (delta: -86.5 MB). Free memory was 247.5 MB in the beginning and 175.3 MB in the end (delta: 72.2 MB). There was no memory consumed. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 697 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 12 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 59 PlacesBefore, 20 PlacesAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 50 TotalNumberOfCompositions, 943 MoverChecksTotal - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (354states) and FLOYD_HOARE automaton (currently 19 states, 19 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 29 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 872.6s, OverallIterations: 317, TraceHistogramMax: 7, AutomataDifference: 543.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 4189 SDtfs, 37557 SDslu, 32519 SDs, 0 SdLazy, 23250 SolverSat, 9904 SolverUnsat, 62 SolverUnknown, 0 SolverNotchecked, 156.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9358 GetRequests, 1544 SyntacticMatches, 292 SemanticMatches, 7521 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 51484 ImplicationChecksByTransitivity, 601.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=357occurred in iteration=309, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 316 MinimizatonAttempts, 20704 StatesRemovedByMinimization, 314 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 4.8s SatisfiabilityAnalysisTime, 247.5s InterpolantComputationTime, 8308 NumberOfCodeBlocks, 8306 NumberOfCodeBlocksAsserted, 1006 NumberOfCheckSat, 7682 ConstructedInterpolants, 52 QuantifiedInterpolants, 893222 SizeOfPredicates, 307 NumberOfNonLiveVariables, 27976 ConjunctsInSsa, 3224 ConjunctsInUnsatCore, 626 InterpolantComputations, 10 PerfectInterpolantSequences, 42/3966 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown