/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-New_States.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-12 09:40:43,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-12 09:40:43,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-12 09:40:43,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-12 09:40:43,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-12 09:40:43,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-12 09:40:43,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-12 09:40:43,233 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-12 09:40:43,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-12 09:40:43,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-12 09:40:43,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-12 09:40:43,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-12 09:40:43,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-12 09:40:43,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-12 09:40:43,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-12 09:40:43,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-12 09:40:43,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-12 09:40:43,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-12 09:40:43,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-12 09:40:43,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-12 09:40:43,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-12 09:40:43,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-12 09:40:43,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-12 09:40:43,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-12 09:40:43,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-12 09:40:43,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-12 09:40:43,300 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-12 09:40:43,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-12 09:40:43,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-12 09:40:43,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-12 09:40:43,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-12 09:40:43,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-12 09:40:43,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-12 09:40:43,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-12 09:40:43,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-12 09:40:43,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-12 09:40:43,309 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-New_States.epf [2020-11-12 09:40:43,370 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-12 09:40:43,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-12 09:40:43,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-12 09:40:43,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-12 09:40:43,376 INFO L138 SettingsManager]: * Use SBE=true [2020-11-12 09:40:43,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-12 09:40:43,377 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-12 09:40:43,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-12 09:40:43,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-12 09:40:43,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-12 09:40:43,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-12 09:40:43,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-12 09:40:43,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-12 09:40:43,380 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-12 09:40:43,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-12 09:40:43,380 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-12 09:40:43,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-12 09:40:43,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-12 09:40:43,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-12 09:40:43,381 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-12 09:40:43,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-12 09:40:43,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-12 09:40:43,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-12 09:40:43,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-12 09:40:43,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-12 09:40:43,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-12 09:40:43,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-12 09:40:43,383 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-11-12 09:40:43,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-12 09:40:43,383 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-12 09:40:43,384 INFO L138 SettingsManager]: * Sleep set reduction in concurrent analysis=NEW_STATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-12 09:40:43,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-12 09:40:43,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-12 09:40:43,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-12 09:40:43,877 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-12 09:40:43,878 INFO L275 PluginConnector]: CDTParser initialized [2020-11-12 09:40:43,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-11-12 09:40:43,958 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7c57a607/6c28d6a14cd649c48665afa10907aee5/FLAGb337fcc6b [2020-11-12 09:40:44,854 INFO L306 CDTParser]: Found 1 translation units. [2020-11-12 09:40:44,855 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-11-12 09:40:44,880 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7c57a607/6c28d6a14cd649c48665afa10907aee5/FLAGb337fcc6b [2020-11-12 09:40:45,048 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7c57a607/6c28d6a14cd649c48665afa10907aee5 [2020-11-12 09:40:45,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-12 09:40:45,060 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-12 09:40:45,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-12 09:40:45,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-12 09:40:45,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-12 09:40:45,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 09:40:45" (1/1) ... [2020-11-12 09:40:45,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@359ac608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:45, skipping insertion in model container [2020-11-12 09:40:45,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 09:40:45" (1/1) ... [2020-11-12 09:40:45,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-12 09:40:45,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-12 09:40:45,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-12 09:40:45,498 INFO L203 MainTranslator]: Completed pre-run [2020-11-12 09:40:45,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-12 09:40:45,664 INFO L208 MainTranslator]: Completed translation [2020-11-12 09:40:45,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:45 WrapperNode [2020-11-12 09:40:45,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-12 09:40:45,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-12 09:40:45,668 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-12 09:40:45,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-12 09:40:45,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:45" (1/1) ... [2020-11-12 09:40:45,691 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:45" (1/1) ... [2020-11-12 09:40:45,712 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-12 09:40:45,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-12 09:40:45,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-12 09:40:45,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-12 09:40:45,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:45" (1/1) ... [2020-11-12 09:40:45,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:45" (1/1) ... [2020-11-12 09:40:45,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:45" (1/1) ... [2020-11-12 09:40:45,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:45" (1/1) ... [2020-11-12 09:40:45,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:45" (1/1) ... [2020-11-12 09:40:45,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:45" (1/1) ... [2020-11-12 09:40:45,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:45" (1/1) ... [2020-11-12 09:40:45,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-12 09:40:45,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-12 09:40:45,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-12 09:40:45,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-12 09:40:45,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:45" (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 [2020-11-12 09:40:45,814 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-12 09:40:45,815 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-12 09:40:45,815 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-12 09:40:45,815 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-12 09:40:45,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-12 09:40:45,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-12 09:40:45,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-12 09:40:45,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-12 09:40:45,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-12 09:40:45,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-12 09:40:45,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-12 09:40:45,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-12 09:40:45,822 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-12 09:40:46,151 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-12 09:40:46,151 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-12 09:40:46,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 09:40:46 BoogieIcfgContainer [2020-11-12 09:40:46,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-12 09:40:46,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-12 09:40:46,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-12 09:40:46,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-12 09:40:46,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 09:40:45" (1/3) ... [2020-11-12 09:40:46,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa5ce00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 09:40:46, skipping insertion in model container [2020-11-12 09:40:46,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:45" (2/3) ... [2020-11-12 09:40:46,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa5ce00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 09:40:46, skipping insertion in model container [2020-11-12 09:40:46,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 09:40:46" (3/3) ... [2020-11-12 09:40:46,162 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-11-12 09:40:46,175 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-12 09:40:46,175 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-12 09:40:46,178 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-12 09:40:46,179 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-12 09:40:46,209 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,210 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,210 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,210 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,210 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,211 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,211 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,211 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,211 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,211 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,212 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,212 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,212 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,212 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,213 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,213 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,213 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,213 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,214 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,214 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,214 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,214 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,214 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,215 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,215 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,215 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,215 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,215 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,216 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,216 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,216 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,216 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,217 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,217 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,217 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,217 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,217 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,218 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,218 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,218 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,219 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,219 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,222 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,223 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,223 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,223 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,224 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,224 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,224 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,224 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,225 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,225 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,225 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,225 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,226 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,226 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,228 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,229 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,229 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,229 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,230 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,230 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,236 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,236 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,236 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,237 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,237 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,237 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:46,241 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-12 09:40:46,255 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-12 09:40:46,280 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-12 09:40:46,280 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-12 09:40:46,281 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-12 09:40:46,281 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-12 09:40:46,281 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-12 09:40:46,281 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-12 09:40:46,281 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-12 09:40:46,282 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-12 09:40:46,295 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 64 transitions, 138 flow [2020-11-12 09:40:46,431 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:46,692 WARN L455 BasicCegarLoop]: Sleep Set Reduction Time: 257ms [2020-11-12 09:40:46,699 WARN L456 BasicCegarLoop]: Sleep set: input automaton has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:46,716 WARN L457 BasicCegarLoop]: Sleep set: output automaton has 6412 states, 5723 states have (on average 1.2081076358553207) internal successors, (6914), 6411 states have internal predecessors, (6914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:46,732 INFO L276 IsEmpty]: Start isEmpty. Operand has 6412 states, 5723 states have (on average 1.2081076358553207) internal successors, (6914), 6411 states have internal predecessors, (6914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:46,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-12 09:40:46,742 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:46,743 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:40:46,743 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:46,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:46,750 INFO L82 PathProgramCache]: Analyzing trace with hash 27863943, now seen corresponding path program 1 times [2020-11-12 09:40:46,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:46,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934573173] [2020-11-12 09:40:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:47,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934573173] [2020-11-12 09:40:47,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:40:47,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-12 09:40:47,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732730864] [2020-11-12 09:40:47,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-12 09:40:47,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:47,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-12 09:40:47,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-12 09:40:47,269 INFO L87 Difference]: Start difference. First operand has 6412 states, 5723 states have (on average 1.2081076358553207) internal successors, (6914), 6411 states have internal predecessors, (6914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:47,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:47,450 INFO L93 Difference]: Finished difference Result 3969 states and 4537 transitions. [2020-11-12 09:40:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-12 09:40:47,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2020-11-12 09:40:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:47,478 INFO L225 Difference]: With dead ends: 3969 [2020-11-12 09:40:47,479 INFO L226 Difference]: Without dead ends: 1423 [2020-11-12 09:40:47,481 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-11-12 09:40:47,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2020-11-12 09:40:47,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1065. [2020-11-12 09:40:47,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 969 states have (on average 1.4066047471620227) internal successors, (1363), 1064 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:47,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1363 transitions. [2020-11-12 09:40:47,612 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1363 transitions. Word has length 28 [2020-11-12 09:40:47,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:47,612 INFO L481 AbstractCegarLoop]: Abstraction has 1065 states and 1363 transitions. [2020-11-12 09:40:47,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:47,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1363 transitions. [2020-11-12 09:40:47,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-12 09:40:47,618 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:47,619 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:40:47,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-12 09:40:47,619 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:47,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:47,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1108146506, now seen corresponding path program 1 times [2020-11-12 09:40:47,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:47,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073941890] [2020-11-12 09:40:47,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:47,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073941890] [2020-11-12 09:40:47,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:40:47,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-12 09:40:47,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618327271] [2020-11-12 09:40:47,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-12 09:40:47,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:47,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-12 09:40:47,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-12 09:40:47,811 INFO L87 Difference]: Start difference. First operand 1065 states and 1363 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:47,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:47,922 INFO L93 Difference]: Finished difference Result 1193 states and 1540 transitions. [2020-11-12 09:40:47,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-12 09:40:47,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2020-11-12 09:40:47,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:47,928 INFO L225 Difference]: With dead ends: 1193 [2020-11-12 09:40:47,929 INFO L226 Difference]: Without dead ends: 967 [2020-11-12 09:40:47,930 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-12 09:40:47,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2020-11-12 09:40:47,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 922. [2020-11-12 09:40:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 842 states have (on average 1.4239904988123515) internal successors, (1199), 921 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:47,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1199 transitions. [2020-11-12 09:40:48,000 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1199 transitions. Word has length 32 [2020-11-12 09:40:48,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:48,000 INFO L481 AbstractCegarLoop]: Abstraction has 922 states and 1199 transitions. [2020-11-12 09:40:48,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:48,001 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1199 transitions. [2020-11-12 09:40:48,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-12 09:40:48,004 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:48,005 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:40:48,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-12 09:40:48,006 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:48,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:48,007 INFO L82 PathProgramCache]: Analyzing trace with hash 168146404, now seen corresponding path program 1 times [2020-11-12 09:40:48,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:48,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991987012] [2020-11-12 09:40:48,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:48,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991987012] [2020-11-12 09:40:48,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:40:48,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-12 09:40:48,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37041384] [2020-11-12 09:40:48,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-12 09:40:48,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:48,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-12 09:40:48,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-12 09:40:48,185 INFO L87 Difference]: Start difference. First operand 922 states and 1199 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:48,296 INFO L93 Difference]: Finished difference Result 1179 states and 1471 transitions. [2020-11-12 09:40:48,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-12 09:40:48,297 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2020-11-12 09:40:48,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:48,302 INFO L225 Difference]: With dead ends: 1179 [2020-11-12 09:40:48,302 INFO L226 Difference]: Without dead ends: 803 [2020-11-12 09:40:48,303 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-11-12 09:40:48,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2020-11-12 09:40:48,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 781. [2020-11-12 09:40:48,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 717 states have (on average 1.4546722454672245) internal successors, (1043), 780 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1043 transitions. [2020-11-12 09:40:48,326 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1043 transitions. Word has length 32 [2020-11-12 09:40:48,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:48,326 INFO L481 AbstractCegarLoop]: Abstraction has 781 states and 1043 transitions. [2020-11-12 09:40:48,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:48,327 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1043 transitions. [2020-11-12 09:40:48,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-12 09:40:48,328 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:48,328 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:40:48,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-12 09:40:48,329 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:48,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:48,330 INFO L82 PathProgramCache]: Analyzing trace with hash -470623983, now seen corresponding path program 1 times [2020-11-12 09:40:48,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:48,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752489552] [2020-11-12 09:40:48,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:48,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752489552] [2020-11-12 09:40:48,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:40:48,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-12 09:40:48,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198640667] [2020-11-12 09:40:48,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-12 09:40:48,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:48,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-12 09:40:48,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-12 09:40:48,482 INFO L87 Difference]: Start difference. First operand 781 states and 1043 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:48,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:48,610 INFO L93 Difference]: Finished difference Result 1609 states and 1963 transitions. [2020-11-12 09:40:48,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-12 09:40:48,611 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2020-11-12 09:40:48,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:48,618 INFO L225 Difference]: With dead ends: 1609 [2020-11-12 09:40:48,618 INFO L226 Difference]: Without dead ends: 1395 [2020-11-12 09:40:48,619 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-11-12 09:40:48,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2020-11-12 09:40:48,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 834. [2020-11-12 09:40:48,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 770 states have (on average 1.4376623376623376) internal successors, (1107), 833 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:48,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1107 transitions. [2020-11-12 09:40:48,650 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1107 transitions. Word has length 36 [2020-11-12 09:40:48,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:48,650 INFO L481 AbstractCegarLoop]: Abstraction has 834 states and 1107 transitions. [2020-11-12 09:40:48,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:48,651 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1107 transitions. [2020-11-12 09:40:48,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-12 09:40:48,652 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:48,652 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:40:48,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-12 09:40:48,653 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:48,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:48,653 INFO L82 PathProgramCache]: Analyzing trace with hash 661466183, now seen corresponding path program 2 times [2020-11-12 09:40:48,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:48,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074093369] [2020-11-12 09:40:48,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:48,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074093369] [2020-11-12 09:40:48,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:40:48,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-12 09:40:48,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766150911] [2020-11-12 09:40:48,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-12 09:40:48,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:48,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-12 09:40:48,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-12 09:40:48,774 INFO L87 Difference]: Start difference. First operand 834 states and 1107 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:48,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:48,869 INFO L93 Difference]: Finished difference Result 1143 states and 1497 transitions. [2020-11-12 09:40:48,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-12 09:40:48,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2020-11-12 09:40:48,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:48,875 INFO L225 Difference]: With dead ends: 1143 [2020-11-12 09:40:48,875 INFO L226 Difference]: Without dead ends: 887 [2020-11-12 09:40:48,876 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-12 09:40:48,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2020-11-12 09:40:48,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 860. [2020-11-12 09:40:48,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 796 states have (on average 1.434673366834171) internal successors, (1142), 859 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:48,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1142 transitions. [2020-11-12 09:40:48,902 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1142 transitions. Word has length 36 [2020-11-12 09:40:48,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:48,903 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1142 transitions. [2020-11-12 09:40:48,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:48,903 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1142 transitions. [2020-11-12 09:40:48,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-12 09:40:48,904 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:48,904 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:40:48,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-12 09:40:48,905 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:48,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:48,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1267275225, now seen corresponding path program 3 times [2020-11-12 09:40:48,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:48,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37918312] [2020-11-12 09:40:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:49,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37918312] [2020-11-12 09:40:49,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:40:49,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-12 09:40:49,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001618298] [2020-11-12 09:40:49,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-12 09:40:49,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:49,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-12 09:40:49,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-12 09:40:49,061 INFO L87 Difference]: Start difference. First operand 860 states and 1142 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:49,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:49,281 INFO L93 Difference]: Finished difference Result 1438 states and 1810 transitions. [2020-11-12 09:40:49,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-12 09:40:49,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2020-11-12 09:40:49,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:49,288 INFO L225 Difference]: With dead ends: 1438 [2020-11-12 09:40:49,288 INFO L226 Difference]: Without dead ends: 888 [2020-11-12 09:40:49,290 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-11-12 09:40:49,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2020-11-12 09:40:49,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 821. [2020-11-12 09:40:49,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 757 states have (on average 1.4451783355350065) internal successors, (1094), 820 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:49,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1094 transitions. [2020-11-12 09:40:49,318 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1094 transitions. Word has length 36 [2020-11-12 09:40:49,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:49,319 INFO L481 AbstractCegarLoop]: Abstraction has 821 states and 1094 transitions. [2020-11-12 09:40:49,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:49,319 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1094 transitions. [2020-11-12 09:40:49,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-12 09:40:49,320 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:49,321 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:40:49,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-12 09:40:49,322 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:49,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:49,323 INFO L82 PathProgramCache]: Analyzing trace with hash -733270170, now seen corresponding path program 1 times [2020-11-12 09:40:49,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:49,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527587859] [2020-11-12 09:40:49,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:49,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527587859] [2020-11-12 09:40:49,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4436494] [2020-11-12 09:40:49,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:49,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-12 09:40:49,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:49,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:49,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:49,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:49,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-11-12 09:40:49,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788714894] [2020-11-12 09:40:49,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-12 09:40:49,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:49,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-12 09:40:49,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-12 09:40:49,718 INFO L87 Difference]: Start difference. First operand 821 states and 1094 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:49,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:49,924 INFO L93 Difference]: Finished difference Result 1144 states and 1447 transitions. [2020-11-12 09:40:49,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-12 09:40:49,925 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2020-11-12 09:40:49,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:49,930 INFO L225 Difference]: With dead ends: 1144 [2020-11-12 09:40:49,930 INFO L226 Difference]: Without dead ends: 930 [2020-11-12 09:40:49,931 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-11-12 09:40:49,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2020-11-12 09:40:49,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 841. [2020-11-12 09:40:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 777 states have (on average 1.4465894465894467) internal successors, (1124), 840 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:49,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1124 transitions. [2020-11-12 09:40:49,958 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1124 transitions. Word has length 41 [2020-11-12 09:40:49,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:49,959 INFO L481 AbstractCegarLoop]: Abstraction has 841 states and 1124 transitions. [2020-11-12 09:40:49,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1124 transitions. [2020-11-12 09:40:49,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-12 09:40:49,960 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:49,960 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:40:50,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-12 09:40:50,174 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:50,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:50,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1717865532, now seen corresponding path program 2 times [2020-11-12 09:40:50,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:50,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968466068] [2020-11-12 09:40:50,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:50,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:50,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968466068] [2020-11-12 09:40:50,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78363737] [2020-11-12 09:40:50,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:50,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:40:50,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:50,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 09:40:50,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:50,413 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:50,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:50,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-12 09:40:50,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461238753] [2020-11-12 09:40:50,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-12 09:40:50,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:50,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-12 09:40:50,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-12 09:40:50,423 INFO L87 Difference]: Start difference. First operand 841 states and 1124 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:50,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:50,697 INFO L93 Difference]: Finished difference Result 1492 states and 1878 transitions. [2020-11-12 09:40:50,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-12 09:40:50,698 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2020-11-12 09:40:50,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:50,703 INFO L225 Difference]: With dead ends: 1492 [2020-11-12 09:40:50,703 INFO L226 Difference]: Without dead ends: 956 [2020-11-12 09:40:50,704 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-11-12 09:40:50,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2020-11-12 09:40:50,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 839. [2020-11-12 09:40:50,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 775 states have (on average 1.44) internal successors, (1116), 838 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:50,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1116 transitions. [2020-11-12 09:40:50,728 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1116 transitions. Word has length 41 [2020-11-12 09:40:50,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:50,729 INFO L481 AbstractCegarLoop]: Abstraction has 839 states and 1116 transitions. [2020-11-12 09:40:50,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:50,729 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1116 transitions. [2020-11-12 09:40:50,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-12 09:40:50,730 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:50,731 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:40:50,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:50,944 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:50,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:50,945 INFO L82 PathProgramCache]: Analyzing trace with hash 558735100, now seen corresponding path program 1 times [2020-11-12 09:40:50,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:50,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337740086] [2020-11-12 09:40:50,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:50,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:51,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337740086] [2020-11-12 09:40:51,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142297319] [2020-11-12 09:40:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-11-12 09:40:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:51,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 09:40:51,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:51,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:51,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:51,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:51,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-11-12 09:40:51,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147477187] [2020-11-12 09:40:51,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-12 09:40:51,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:51,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-12 09:40:51,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-11-12 09:40:51,263 INFO L87 Difference]: Start difference. First operand 839 states and 1116 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:51,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:51,505 INFO L93 Difference]: Finished difference Result 1532 states and 1884 transitions. [2020-11-12 09:40:51,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-12 09:40:51,506 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2020-11-12 09:40:51,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:51,512 INFO L225 Difference]: With dead ends: 1532 [2020-11-12 09:40:51,513 INFO L226 Difference]: Without dead ends: 1290 [2020-11-12 09:40:51,513 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:40:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2020-11-12 09:40:51,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 849. [2020-11-12 09:40:51,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 785 states have (on average 1.4369426751592356) internal successors, (1128), 848 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:51,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1128 transitions. [2020-11-12 09:40:51,543 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1128 transitions. Word has length 46 [2020-11-12 09:40:51,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:51,543 INFO L481 AbstractCegarLoop]: Abstraction has 849 states and 1128 transitions. [2020-11-12 09:40:51,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:51,544 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1128 transitions. [2020-11-12 09:40:51,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-12 09:40:51,545 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:51,545 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:40:51,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:51,759 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:51,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:51,760 INFO L82 PathProgramCache]: Analyzing trace with hash 735627068, now seen corresponding path program 2 times [2020-11-12 09:40:51,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:51,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207625190] [2020-11-12 09:40:51,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:51,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207625190] [2020-11-12 09:40:51,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415770844] [2020-11-12 09:40:51,897 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 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 [2020-11-12 09:40:51,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:40:51,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:51,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 09:40:51,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:52,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:52,068 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:52,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:52,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-12 09:40:52,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708309549] [2020-11-12 09:40:52,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-12 09:40:52,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:52,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-12 09:40:52,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-11-12 09:40:52,084 INFO L87 Difference]: Start difference. First operand 849 states and 1128 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:52,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:52,401 INFO L93 Difference]: Finished difference Result 1240 states and 1561 transitions. [2020-11-12 09:40:52,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-12 09:40:52,402 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2020-11-12 09:40:52,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:52,410 INFO L225 Difference]: With dead ends: 1240 [2020-11-12 09:40:52,411 INFO L226 Difference]: Without dead ends: 1026 [2020-11-12 09:40:52,411 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:40:52,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2020-11-12 09:40:52,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 872. [2020-11-12 09:40:52,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 808 states have (on average 1.438118811881188) internal successors, (1162), 871 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:52,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1162 transitions. [2020-11-12 09:40:52,440 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1162 transitions. Word has length 46 [2020-11-12 09:40:52,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:52,440 INFO L481 AbstractCegarLoop]: Abstraction has 872 states and 1162 transitions. [2020-11-12 09:40:52,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:52,440 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1162 transitions. [2020-11-12 09:40:52,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-12 09:40:52,442 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:52,442 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:40:52,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:52,656 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:52,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:52,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1108204526, now seen corresponding path program 3 times [2020-11-12 09:40:52,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:52,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465544636] [2020-11-12 09:40:52,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:52,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:52,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465544636] [2020-11-12 09:40:52,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288192886] [2020-11-12 09:40:52,854 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 [2020-11-12 09:40:52,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-12 09:40:52,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:52,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 09:40:52,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:53,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:53,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:53,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-12 09:40:53,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941955168] [2020-11-12 09:40:53,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-12 09:40:53,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:53,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-12 09:40:53,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-12 09:40:53,030 INFO L87 Difference]: Start difference. First operand 872 states and 1162 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:53,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:53,324 INFO L93 Difference]: Finished difference Result 1543 states and 1938 transitions. [2020-11-12 09:40:53,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-12 09:40:53,325 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2020-11-12 09:40:53,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:53,330 INFO L225 Difference]: With dead ends: 1543 [2020-11-12 09:40:53,330 INFO L226 Difference]: Without dead ends: 1007 [2020-11-12 09:40:53,331 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:40:53,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2020-11-12 09:40:53,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 872. [2020-11-12 09:40:53,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 808 states have (on average 1.431930693069307) internal successors, (1157), 871 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:53,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1157 transitions. [2020-11-12 09:40:53,357 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1157 transitions. Word has length 46 [2020-11-12 09:40:53,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:53,357 INFO L481 AbstractCegarLoop]: Abstraction has 872 states and 1157 transitions. [2020-11-12 09:40:53,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:53,358 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1157 transitions. [2020-11-12 09:40:53,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-12 09:40:53,359 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:53,359 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:40:53,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-12 09:40:53,573 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:53,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:53,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1319926319, now seen corresponding path program 4 times [2020-11-12 09:40:53,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:53,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566314314] [2020-11-12 09:40:53,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:53,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566314314] [2020-11-12 09:40:53,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354284769] [2020-11-12 09:40:53,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:53,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:40:53,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:53,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:40:53,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:53,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:53,916 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:53,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:53,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-11-12 09:40:53,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052410830] [2020-11-12 09:40:53,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-12 09:40:53,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:53,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-12 09:40:53,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-11-12 09:40:53,926 INFO L87 Difference]: Start difference. First operand 872 states and 1157 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:54,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:54,280 INFO L93 Difference]: Finished difference Result 1261 states and 1587 transitions. [2020-11-12 09:40:54,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-12 09:40:54,280 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2020-11-12 09:40:54,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:54,286 INFO L225 Difference]: With dead ends: 1261 [2020-11-12 09:40:54,286 INFO L226 Difference]: Without dead ends: 1047 [2020-11-12 09:40:54,287 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2020-11-12 09:40:54,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2020-11-12 09:40:54,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 886. [2020-11-12 09:40:54,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 822 states have (on average 1.4355231143552312) internal successors, (1180), 885 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1180 transitions. [2020-11-12 09:40:54,312 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1180 transitions. Word has length 51 [2020-11-12 09:40:54,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:54,313 INFO L481 AbstractCegarLoop]: Abstraction has 886 states and 1180 transitions. [2020-11-12 09:40:54,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:54,313 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1180 transitions. [2020-11-12 09:40:54,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-12 09:40:54,314 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:54,314 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:40:54,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:54,529 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:54,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:54,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1131209383, now seen corresponding path program 5 times [2020-11-12 09:40:54,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:54,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658900858] [2020-11-12 09:40:54,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:54,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658900858] [2020-11-12 09:40:54,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140369604] [2020-11-12 09:40:54,672 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 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 [2020-11-12 09:40:54,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:40:54,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:54,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 09:40:54,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:54,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:54,800 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:54,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:54,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-11-12 09:40:54,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481925139] [2020-11-12 09:40:54,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-12 09:40:54,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:54,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-12 09:40:54,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-11-12 09:40:54,810 INFO L87 Difference]: Start difference. First operand 886 states and 1180 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:55,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:55,294 INFO L93 Difference]: Finished difference Result 1793 states and 2148 transitions. [2020-11-12 09:40:55,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-12 09:40:55,295 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2020-11-12 09:40:55,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:55,301 INFO L225 Difference]: With dead ends: 1793 [2020-11-12 09:40:55,301 INFO L226 Difference]: Without dead ends: 1059 [2020-11-12 09:40:55,302 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2020-11-12 09:40:55,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2020-11-12 09:40:55,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 896. [2020-11-12 09:40:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 832 states have (on average 1.4338942307692308) internal successors, (1193), 895 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:55,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1193 transitions. [2020-11-12 09:40:55,326 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1193 transitions. Word has length 51 [2020-11-12 09:40:55,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:55,327 INFO L481 AbstractCegarLoop]: Abstraction has 896 states and 1193 transitions. [2020-11-12 09:40:55,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:55,327 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1193 transitions. [2020-11-12 09:40:55,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-12 09:40:55,328 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:55,329 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:40:55,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:55,542 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:55,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:55,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1873386279, now seen corresponding path program 6 times [2020-11-12 09:40:55,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:55,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496551962] [2020-11-12 09:40:55,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:55,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496551962] [2020-11-12 09:40:55,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152090975] [2020-11-12 09:40:55,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:55,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 09:40:55,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:55,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:40:55,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:55,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:55,853 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:55,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:55,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-11-12 09:40:55,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123088447] [2020-11-12 09:40:55,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 09:40:55,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:55,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 09:40:55,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-12 09:40:55,868 INFO L87 Difference]: Start difference. First operand 896 states and 1193 transitions. Second operand has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 14 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:56,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:56,198 INFO L93 Difference]: Finished difference Result 1637 states and 2018 transitions. [2020-11-12 09:40:56,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-12 09:40:56,198 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 14 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-11-12 09:40:56,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:56,206 INFO L225 Difference]: With dead ends: 1637 [2020-11-12 09:40:56,206 INFO L226 Difference]: Without dead ends: 1395 [2020-11-12 09:40:56,207 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2020-11-12 09:40:56,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2020-11-12 09:40:56,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 906. [2020-11-12 09:40:56,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 842 states have (on average 1.4311163895486936) internal successors, (1205), 905 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:56,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1205 transitions. [2020-11-12 09:40:56,236 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1205 transitions. Word has length 56 [2020-11-12 09:40:56,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:56,237 INFO L481 AbstractCegarLoop]: Abstraction has 906 states and 1205 transitions. [2020-11-12 09:40:56,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 14 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:56,237 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1205 transitions. [2020-11-12 09:40:56,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-12 09:40:56,238 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:56,238 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:40:56,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-12 09:40:56,452 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:56,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:56,453 INFO L82 PathProgramCache]: Analyzing trace with hash 797709159, now seen corresponding path program 7 times [2020-11-12 09:40:56,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:56,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354458061] [2020-11-12 09:40:56,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:56,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354458061] [2020-11-12 09:40:56,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203535441] [2020-11-12 09:40:56,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:56,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:56,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:40:56,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:56,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:56,723 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:56,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:56,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-12 09:40:56,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543749698] [2020-11-12 09:40:56,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-12 09:40:56,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:56,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-12 09:40:56,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-11-12 09:40:56,733 INFO L87 Difference]: Start difference. First operand 906 states and 1205 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:57,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:57,100 INFO L93 Difference]: Finished difference Result 1310 states and 1643 transitions. [2020-11-12 09:40:57,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-12 09:40:57,101 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-11-12 09:40:57,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:57,109 INFO L225 Difference]: With dead ends: 1310 [2020-11-12 09:40:57,109 INFO L226 Difference]: Without dead ends: 1068 [2020-11-12 09:40:57,112 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2020-11-12 09:40:57,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2020-11-12 09:40:57,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 913. [2020-11-12 09:40:57,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 849 states have (on average 1.4287396937573615) internal successors, (1213), 912 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1213 transitions. [2020-11-12 09:40:57,143 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1213 transitions. Word has length 56 [2020-11-12 09:40:57,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:57,143 INFO L481 AbstractCegarLoop]: Abstraction has 913 states and 1213 transitions. [2020-11-12 09:40:57,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:57,143 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1213 transitions. [2020-11-12 09:40:57,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-12 09:40:57,144 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:57,145 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:40:57,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-12 09:40:57,359 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:57,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:57,360 INFO L82 PathProgramCache]: Analyzing trace with hash 423479847, now seen corresponding path program 8 times [2020-11-12 09:40:57,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:57,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048178779] [2020-11-12 09:40:57,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:57,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048178779] [2020-11-12 09:40:57,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213882573] [2020-11-12 09:40:57,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:57,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:40:57,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:57,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:40:57,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:57,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:57,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:57,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:57,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-12 09:40:57,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711760415] [2020-11-12 09:40:57,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-12 09:40:57,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:57,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-12 09:40:57,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-12 09:40:57,662 INFO L87 Difference]: Start difference. First operand 913 states and 1213 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:58,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:58,105 INFO L93 Difference]: Finished difference Result 1314 states and 1649 transitions. [2020-11-12 09:40:58,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-12 09:40:58,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-11-12 09:40:58,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:58,113 INFO L225 Difference]: With dead ends: 1314 [2020-11-12 09:40:58,114 INFO L226 Difference]: Without dead ends: 1100 [2020-11-12 09:40:58,114 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2020-11-12 09:40:58,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2020-11-12 09:40:58,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 917. [2020-11-12 09:40:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 853 states have (on average 1.4279015240328252) internal successors, (1218), 916 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1218 transitions. [2020-11-12 09:40:58,144 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1218 transitions. Word has length 56 [2020-11-12 09:40:58,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:58,144 INFO L481 AbstractCegarLoop]: Abstraction has 917 states and 1218 transitions. [2020-11-12 09:40:58,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:58,145 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1218 transitions. [2020-11-12 09:40:58,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-12 09:40:58,153 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:58,153 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:40:58,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-12 09:40:58,367 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:58,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:58,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1420351747, now seen corresponding path program 9 times [2020-11-12 09:40:58,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:58,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510760748] [2020-11-12 09:40:58,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:58,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510760748] [2020-11-12 09:40:58,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528626738] [2020-11-12 09:40:58,506 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 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 [2020-11-12 09:40:58,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 09:40:58,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:58,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:40:58,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:58,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:58,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:58,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-11-12 09:40:58,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975759389] [2020-11-12 09:40:58,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-12 09:40:58,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:58,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-12 09:40:58,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-11-12 09:40:58,677 INFO L87 Difference]: Start difference. First operand 917 states and 1218 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:59,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:59,204 INFO L93 Difference]: Finished difference Result 1822 states and 2189 transitions. [2020-11-12 09:40:59,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-12 09:40:59,205 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-11-12 09:40:59,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:59,210 INFO L225 Difference]: With dead ends: 1822 [2020-11-12 09:40:59,210 INFO L226 Difference]: Without dead ends: 1088 [2020-11-12 09:40:59,211 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2020-11-12 09:40:59,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2020-11-12 09:40:59,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 903. [2020-11-12 09:40:59,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 839 states have (on average 1.4243146603098926) internal successors, (1195), 902 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:59,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1195 transitions. [2020-11-12 09:40:59,233 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1195 transitions. Word has length 56 [2020-11-12 09:40:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:59,234 INFO L481 AbstractCegarLoop]: Abstraction has 903 states and 1195 transitions. [2020-11-12 09:40:59,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:40:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1195 transitions. [2020-11-12 09:40:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-12 09:40:59,235 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:59,235 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:40:59,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-12 09:40:59,449 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:59,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:59,450 INFO L82 PathProgramCache]: Analyzing trace with hash 172841916, now seen corresponding path program 10 times [2020-11-12 09:40:59,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:59,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314903791] [2020-11-12 09:40:59,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:59,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314903791] [2020-11-12 09:40:59,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721501273] [2020-11-12 09:40:59,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:59,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:40:59,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:59,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:40:59,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:59,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:59,741 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:59,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:59,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-12 09:40:59,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199365979] [2020-11-12 09:40:59,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-12 09:40:59,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:59,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-12 09:40:59,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-11-12 09:40:59,752 INFO L87 Difference]: Start difference. First operand 903 states and 1195 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:00,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:00,168 INFO L93 Difference]: Finished difference Result 1331 states and 1663 transitions. [2020-11-12 09:41:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-12 09:41:00,168 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2020-11-12 09:41:00,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:00,175 INFO L225 Difference]: With dead ends: 1331 [2020-11-12 09:41:00,176 INFO L226 Difference]: Without dead ends: 1089 [2020-11-12 09:41:00,176 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2020-11-12 09:41:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2020-11-12 09:41:00,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 917. [2020-11-12 09:41:00,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 853 states have (on average 1.422039859320047) internal successors, (1213), 916 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1213 transitions. [2020-11-12 09:41:00,199 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1213 transitions. Word has length 61 [2020-11-12 09:41:00,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:00,200 INFO L481 AbstractCegarLoop]: Abstraction has 917 states and 1213 transitions. [2020-11-12 09:41:00,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:00,200 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1213 transitions. [2020-11-12 09:41:00,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-12 09:41:00,201 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:00,202 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:00,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-12 09:41:00,415 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:00,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:00,416 INFO L82 PathProgramCache]: Analyzing trace with hash -201387396, now seen corresponding path program 11 times [2020-11-12 09:41:00,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:00,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048385145] [2020-11-12 09:41:00,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:00,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048385145] [2020-11-12 09:41:00,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744473661] [2020-11-12 09:41:00,591 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 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 [2020-11-12 09:41:00,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-12 09:41:00,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:00,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:41:00,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:00,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:00,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:00,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:00,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-12 09:41:00,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208429189] [2020-11-12 09:41:00,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-12 09:41:00,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:00,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-12 09:41:00,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-11-12 09:41:00,743 INFO L87 Difference]: Start difference. First operand 917 states and 1213 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:01,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:01,283 INFO L93 Difference]: Finished difference Result 1719 states and 2083 transitions. [2020-11-12 09:41:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-12 09:41:01,283 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2020-11-12 09:41:01,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:01,289 INFO L225 Difference]: With dead ends: 1719 [2020-11-12 09:41:01,289 INFO L226 Difference]: Without dead ends: 1168 [2020-11-12 09:41:01,290 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=706, Unknown=0, NotChecked=0, Total=930 [2020-11-12 09:41:01,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2020-11-12 09:41:01,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 931. [2020-11-12 09:41:01,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 867 states have (on average 1.42560553633218) internal successors, (1236), 930 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:01,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1236 transitions. [2020-11-12 09:41:01,313 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1236 transitions. Word has length 61 [2020-11-12 09:41:01,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:01,313 INFO L481 AbstractCegarLoop]: Abstraction has 931 states and 1236 transitions. [2020-11-12 09:41:01,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:01,313 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1236 transitions. [2020-11-12 09:41:01,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-12 09:41:01,314 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:01,315 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:01,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:41:01,529 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:01,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:01,530 INFO L82 PathProgramCache]: Analyzing trace with hash -2045218990, now seen corresponding path program 12 times [2020-11-12 09:41:01,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:01,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699370788] [2020-11-12 09:41:01,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:01,683 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:01,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699370788] [2020-11-12 09:41:01,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949176774] [2020-11-12 09:41:01,684 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 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 [2020-11-12 09:41:01,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 09:41:01,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:01,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:41:01,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:01,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:01,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:01,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-11-12 09:41:01,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651790021] [2020-11-12 09:41:01,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 09:41:01,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:01,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 09:41:01,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-11-12 09:41:01,840 INFO L87 Difference]: Start difference. First operand 931 states and 1236 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:02,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:02,539 INFO L93 Difference]: Finished difference Result 1867 states and 2236 transitions. [2020-11-12 09:41:02,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-12 09:41:02,539 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2020-11-12 09:41:02,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:02,545 INFO L225 Difference]: With dead ends: 1867 [2020-11-12 09:41:02,545 INFO L226 Difference]: Without dead ends: 1133 [2020-11-12 09:41:02,546 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=288, Invalid=902, Unknown=0, NotChecked=0, Total=1190 [2020-11-12 09:41:02,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2020-11-12 09:41:02,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 901. [2020-11-12 09:41:02,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 837 states have (on average 1.4241338112305855) internal successors, (1192), 900 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:02,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1192 transitions. [2020-11-12 09:41:02,569 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1192 transitions. Word has length 61 [2020-11-12 09:41:02,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:02,569 INFO L481 AbstractCegarLoop]: Abstraction has 901 states and 1192 transitions. [2020-11-12 09:41:02,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:02,569 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1192 transitions. [2020-11-12 09:41:02,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-12 09:41:02,571 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:02,571 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:02,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:41:02,786 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:02,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:02,787 INFO L82 PathProgramCache]: Analyzing trace with hash -358310510, now seen corresponding path program 13 times [2020-11-12 09:41:02,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:02,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346937654] [2020-11-12 09:41:02,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:03,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346937654] [2020-11-12 09:41:03,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602249905] [2020-11-12 09:41:03,000 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 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 [2020-11-12 09:41:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:03,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:41:03,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:03,113 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:03,158 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:03,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:03,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2020-11-12 09:41:03,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856392816] [2020-11-12 09:41:03,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-12 09:41:03,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:03,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-12 09:41:03,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-12 09:41:03,186 INFO L87 Difference]: Start difference. First operand 901 states and 1192 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:03,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:03,580 INFO L93 Difference]: Finished difference Result 1656 states and 2033 transitions. [2020-11-12 09:41:03,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-12 09:41:03,580 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-12 09:41:03,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:03,587 INFO L225 Difference]: With dead ends: 1656 [2020-11-12 09:41:03,587 INFO L226 Difference]: Without dead ends: 1414 [2020-11-12 09:41:03,588 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2020-11-12 09:41:03,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2020-11-12 09:41:03,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 911. [2020-11-12 09:41:03,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 847 states have (on average 1.421487603305785) internal successors, (1204), 910 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:03,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1204 transitions. [2020-11-12 09:41:03,611 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1204 transitions. Word has length 66 [2020-11-12 09:41:03,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:03,612 INFO L481 AbstractCegarLoop]: Abstraction has 911 states and 1204 transitions. [2020-11-12 09:41:03,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:03,612 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1204 transitions. [2020-11-12 09:41:03,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-12 09:41:03,613 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:03,614 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:03,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-12 09:41:03,827 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:03,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:03,828 INFO L82 PathProgramCache]: Analyzing trace with hash 620611026, now seen corresponding path program 14 times [2020-11-12 09:41:03,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:03,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570777366] [2020-11-12 09:41:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:04,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570777366] [2020-11-12 09:41:04,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870932505] [2020-11-12 09:41:04,097 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 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 [2020-11-12 09:41:04,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:41:04,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:04,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:41:04,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:04,251 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:04,305 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:04,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:04,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-12 09:41:04,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406553469] [2020-11-12 09:41:04,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-12 09:41:04,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:04,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-12 09:41:04,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-11-12 09:41:04,329 INFO L87 Difference]: Start difference. First operand 911 states and 1204 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:04,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:04,865 INFO L93 Difference]: Finished difference Result 1373 states and 1711 transitions. [2020-11-12 09:41:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-12 09:41:04,865 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-12 09:41:04,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:04,871 INFO L225 Difference]: With dead ends: 1373 [2020-11-12 09:41:04,871 INFO L226 Difference]: Without dead ends: 1131 [2020-11-12 09:41:04,872 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2020-11-12 09:41:04,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2020-11-12 09:41:04,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 934. [2020-11-12 09:41:04,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 870 states have (on average 1.4172413793103449) internal successors, (1233), 933 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:04,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1233 transitions. [2020-11-12 09:41:04,894 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1233 transitions. Word has length 66 [2020-11-12 09:41:04,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:04,895 INFO L481 AbstractCegarLoop]: Abstraction has 934 states and 1233 transitions. [2020-11-12 09:41:04,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:04,895 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1233 transitions. [2020-11-12 09:41:04,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-12 09:41:04,897 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:04,897 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:05,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:41:05,110 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:05,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:05,111 INFO L82 PathProgramCache]: Analyzing trace with hash -637096814, now seen corresponding path program 15 times [2020-11-12 09:41:05,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:05,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413614706] [2020-11-12 09:41:05,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:05,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413614706] [2020-11-12 09:41:05,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392358512] [2020-11-12 09:41:05,309 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 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 [2020-11-12 09:41:05,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 09:41:05,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:05,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:41:05,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:05,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:05,461 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:05,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:05,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-12 09:41:05,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883000955] [2020-11-12 09:41:05,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-12 09:41:05,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:05,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-12 09:41:05,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-11-12 09:41:05,477 INFO L87 Difference]: Start difference. First operand 934 states and 1233 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:05,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:05,979 INFO L93 Difference]: Finished difference Result 1374 states and 1713 transitions. [2020-11-12 09:41:05,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-12 09:41:05,979 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-12 09:41:05,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:05,984 INFO L225 Difference]: With dead ends: 1374 [2020-11-12 09:41:05,984 INFO L226 Difference]: Without dead ends: 1132 [2020-11-12 09:41:05,985 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2020-11-12 09:41:05,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2020-11-12 09:41:06,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 948. [2020-11-12 09:41:06,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 884 states have (on average 1.415158371040724) internal successors, (1251), 947 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1251 transitions. [2020-11-12 09:41:06,007 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1251 transitions. Word has length 66 [2020-11-12 09:41:06,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:06,007 INFO L481 AbstractCegarLoop]: Abstraction has 948 states and 1251 transitions. [2020-11-12 09:41:06,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:06,007 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1251 transitions. [2020-11-12 09:41:06,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-12 09:41:06,009 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:06,009 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:06,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-12 09:41:06,223 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:06,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:06,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1011326126, now seen corresponding path program 16 times [2020-11-12 09:41:06,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:06,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012812681] [2020-11-12 09:41:06,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:06,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012812681] [2020-11-12 09:41:06,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211383688] [2020-11-12 09:41:06,418 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 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 [2020-11-12 09:41:06,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:41:06,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:06,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-12 09:41:06,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:06,549 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:06,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:06,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:06,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-12 09:41:06,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872481066] [2020-11-12 09:41:06,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-12 09:41:06,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:06,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-12 09:41:06,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-11-12 09:41:06,614 INFO L87 Difference]: Start difference. First operand 948 states and 1251 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:07,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:07,242 INFO L93 Difference]: Finished difference Result 1763 states and 2135 transitions. [2020-11-12 09:41:07,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-12 09:41:07,242 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-12 09:41:07,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:07,262 INFO L225 Difference]: With dead ends: 1763 [2020-11-12 09:41:07,262 INFO L226 Difference]: Without dead ends: 1212 [2020-11-12 09:41:07,263 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2020-11-12 09:41:07,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2020-11-12 09:41:07,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 962. [2020-11-12 09:41:07,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 898 states have (on average 1.418708240534521) internal successors, (1274), 961 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:07,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1274 transitions. [2020-11-12 09:41:07,296 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1274 transitions. Word has length 66 [2020-11-12 09:41:07,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:07,297 INFO L481 AbstractCegarLoop]: Abstraction has 962 states and 1274 transitions. [2020-11-12 09:41:07,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:07,297 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1274 transitions. [2020-11-12 09:41:07,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-12 09:41:07,298 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:07,299 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:07,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-12 09:41:07,514 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:07,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:07,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1439809576, now seen corresponding path program 17 times [2020-11-12 09:41:07,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:07,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492453802] [2020-11-12 09:41:07,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:07,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492453802] [2020-11-12 09:41:07,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186498685] [2020-11-12 09:41:07,714 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 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 [2020-11-12 09:41:07,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 09:41:07,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:07,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:41:07,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:07,828 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:07,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:07,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:07,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-12 09:41:07,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165430105] [2020-11-12 09:41:07,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-12 09:41:07,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:07,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-12 09:41:07,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-11-12 09:41:07,868 INFO L87 Difference]: Start difference. First operand 962 states and 1274 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:08,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:08,612 INFO L93 Difference]: Finished difference Result 1889 states and 2269 transitions. [2020-11-12 09:41:08,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-12 09:41:08,612 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-12 09:41:08,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:08,616 INFO L225 Difference]: With dead ends: 1889 [2020-11-12 09:41:08,616 INFO L226 Difference]: Without dead ends: 1155 [2020-11-12 09:41:08,617 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2020-11-12 09:41:08,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2020-11-12 09:41:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 934. [2020-11-12 09:41:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 870 states have (on average 1.4172413793103449) internal successors, (1233), 933 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1233 transitions. [2020-11-12 09:41:08,640 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1233 transitions. Word has length 66 [2020-11-12 09:41:08,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:08,641 INFO L481 AbstractCegarLoop]: Abstraction has 934 states and 1233 transitions. [2020-11-12 09:41:08,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1233 transitions. [2020-11-12 09:41:08,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-12 09:41:08,642 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:08,643 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:08,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-12 09:41:08,858 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:08,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:08,859 INFO L82 PathProgramCache]: Analyzing trace with hash 78931943, now seen corresponding path program 18 times [2020-11-12 09:41:08,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:08,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344180492] [2020-11-12 09:41:08,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:09,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344180492] [2020-11-12 09:41:09,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412964001] [2020-11-12 09:41:09,089 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 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 [2020-11-12 09:41:09,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 09:41:09,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:09,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:41:09,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:09,201 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:09,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:09,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:09,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-12 09:41:09,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108097339] [2020-11-12 09:41:09,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-12 09:41:09,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:09,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-12 09:41:09,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-12 09:41:09,233 INFO L87 Difference]: Start difference. First operand 934 states and 1233 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:09,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:09,712 INFO L93 Difference]: Finished difference Result 1404 states and 1749 transitions. [2020-11-12 09:41:09,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-12 09:41:09,713 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-11-12 09:41:09,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:09,715 INFO L225 Difference]: With dead ends: 1404 [2020-11-12 09:41:09,715 INFO L226 Difference]: Without dead ends: 1162 [2020-11-12 09:41:09,716 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2020-11-12 09:41:09,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-11-12 09:41:09,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 948. [2020-11-12 09:41:09,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 884 states have (on average 1.415158371040724) internal successors, (1251), 947 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1251 transitions. [2020-11-12 09:41:09,738 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1251 transitions. Word has length 71 [2020-11-12 09:41:09,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:09,739 INFO L481 AbstractCegarLoop]: Abstraction has 948 states and 1251 transitions. [2020-11-12 09:41:09,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:09,739 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1251 transitions. [2020-11-12 09:41:09,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-12 09:41:09,740 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:09,741 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:09,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-12 09:41:09,955 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:09,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:09,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1178775897, now seen corresponding path program 19 times [2020-11-12 09:41:09,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:09,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924293736] [2020-11-12 09:41:09,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:10,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924293736] [2020-11-12 09:41:10,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220005676] [2020-11-12 09:41:10,196 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 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 [2020-11-12 09:41:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:10,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:41:10,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:10,297 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:10,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:10,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:10,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-12 09:41:10,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131610233] [2020-11-12 09:41:10,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-12 09:41:10,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:10,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-12 09:41:10,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-11-12 09:41:10,327 INFO L87 Difference]: Start difference. First operand 948 states and 1251 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:10,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:10,906 INFO L93 Difference]: Finished difference Result 1405 states and 1751 transitions. [2020-11-12 09:41:10,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-12 09:41:10,907 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-11-12 09:41:10,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:10,909 INFO L225 Difference]: With dead ends: 1405 [2020-11-12 09:41:10,910 INFO L226 Difference]: Without dead ends: 1163 [2020-11-12 09:41:10,910 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2020-11-12 09:41:10,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2020-11-12 09:41:10,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 962. [2020-11-12 09:41:10,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 898 states have (on average 1.413140311804009) internal successors, (1269), 961 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:10,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1269 transitions. [2020-11-12 09:41:10,933 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1269 transitions. Word has length 71 [2020-11-12 09:41:10,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:10,933 INFO L481 AbstractCegarLoop]: Abstraction has 962 states and 1269 transitions. [2020-11-12 09:41:10,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:10,933 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1269 transitions. [2020-11-12 09:41:10,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-12 09:41:10,935 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:10,935 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:11,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-12 09:41:11,149 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:11,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:11,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1553005209, now seen corresponding path program 20 times [2020-11-12 09:41:11,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:11,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767159620] [2020-11-12 09:41:11,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:11,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767159620] [2020-11-12 09:41:11,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402089642] [2020-11-12 09:41:11,339 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 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 [2020-11-12 09:41:11,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:41:11,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:11,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:41:11,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:11,470 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:11,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:11,496 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:11,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:11,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-12 09:41:11,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873305861] [2020-11-12 09:41:11,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-12 09:41:11,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:11,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-12 09:41:11,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-12 09:41:11,499 INFO L87 Difference]: Start difference. First operand 962 states and 1269 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:12,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:12,205 INFO L93 Difference]: Finished difference Result 1793 states and 2171 transitions. [2020-11-12 09:41:12,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-12 09:41:12,205 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-11-12 09:41:12,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:12,207 INFO L225 Difference]: With dead ends: 1793 [2020-11-12 09:41:12,207 INFO L226 Difference]: Without dead ends: 1242 [2020-11-12 09:41:12,208 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2020-11-12 09:41:12,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2020-11-12 09:41:12,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 976. [2020-11-12 09:41:12,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 912 states have (on average 1.4166666666666667) internal successors, (1292), 975 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1292 transitions. [2020-11-12 09:41:12,228 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1292 transitions. Word has length 71 [2020-11-12 09:41:12,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:12,229 INFO L481 AbstractCegarLoop]: Abstraction has 976 states and 1292 transitions. [2020-11-12 09:41:12,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:12,229 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1292 transitions. [2020-11-12 09:41:12,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-12 09:41:12,231 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:12,231 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:12,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:41:12,446 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:12,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:12,447 INFO L82 PathProgramCache]: Analyzing trace with hash 898130493, now seen corresponding path program 21 times [2020-11-12 09:41:12,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:12,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304564983] [2020-11-12 09:41:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:12,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304564983] [2020-11-12 09:41:12,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381147227] [2020-11-12 09:41:12,647 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 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 [2020-11-12 09:41:12,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 09:41:12,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:12,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-12 09:41:12,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:12,800 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:12,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:12,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-11-12 09:41:12,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527284679] [2020-11-12 09:41:12,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-12 09:41:12,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:12,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-12 09:41:12,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-11-12 09:41:12,809 INFO L87 Difference]: Start difference. First operand 976 states and 1292 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:13,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:13,659 INFO L93 Difference]: Finished difference Result 1941 states and 2324 transitions. [2020-11-12 09:41:13,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-12 09:41:13,660 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2020-11-12 09:41:13,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:13,661 INFO L225 Difference]: With dead ends: 1941 [2020-11-12 09:41:13,662 INFO L226 Difference]: Without dead ends: 1207 [2020-11-12 09:41:13,662 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2020-11-12 09:41:13,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2020-11-12 09:41:13,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 932. [2020-11-12 09:41:13,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 868 states have (on average 1.4170506912442395) internal successors, (1230), 931 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:13,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1230 transitions. [2020-11-12 09:41:13,685 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1230 transitions. Word has length 71 [2020-11-12 09:41:13,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:13,685 INFO L481 AbstractCegarLoop]: Abstraction has 932 states and 1230 transitions. [2020-11-12 09:41:13,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:13,686 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1230 transitions. [2020-11-12 09:41:13,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-12 09:41:13,687 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:13,687 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:13,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-12 09:41:13,902 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:13,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:13,903 INFO L82 PathProgramCache]: Analyzing trace with hash 752604733, now seen corresponding path program 22 times [2020-11-12 09:41:13,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:13,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850100484] [2020-11-12 09:41:13,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:14,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850100484] [2020-11-12 09:41:14,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384582840] [2020-11-12 09:41:14,155 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 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 [2020-11-12 09:41:14,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:41:14,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:14,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-12 09:41:14,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:14,298 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:14,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:14,351 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:14,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:14,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2020-11-12 09:41:14,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614679801] [2020-11-12 09:41:14,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 09:41:14,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:14,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 09:41:14,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-11-12 09:41:14,353 INFO L87 Difference]: Start difference. First operand 932 states and 1230 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:14,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:14,828 INFO L93 Difference]: Finished difference Result 1701 states and 2087 transitions. [2020-11-12 09:41:14,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-12 09:41:14,829 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-12 09:41:14,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:14,832 INFO L225 Difference]: With dead ends: 1701 [2020-11-12 09:41:14,832 INFO L226 Difference]: Without dead ends: 1459 [2020-11-12 09:41:14,833 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=820, Unknown=0, NotChecked=0, Total=1122 [2020-11-12 09:41:14,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2020-11-12 09:41:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 942. [2020-11-12 09:41:14,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 878 states have (on average 1.4145785876993167) internal successors, (1242), 941 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1242 transitions. [2020-11-12 09:41:14,852 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1242 transitions. Word has length 76 [2020-11-12 09:41:14,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:14,853 INFO L481 AbstractCegarLoop]: Abstraction has 942 states and 1242 transitions. [2020-11-12 09:41:14,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:14,853 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1242 transitions. [2020-11-12 09:41:14,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-12 09:41:14,855 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:14,855 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:15,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:41:15,069 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:15,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:15,070 INFO L82 PathProgramCache]: Analyzing trace with hash 17804925, now seen corresponding path program 23 times [2020-11-12 09:41:15,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:15,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361542807] [2020-11-12 09:41:15,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:15,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361542807] [2020-11-12 09:41:15,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332498767] [2020-11-12 09:41:15,339 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 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 [2020-11-12 09:41:15,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-12 09:41:15,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:15,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-12 09:41:15,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:15,454 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:15,507 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 1 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:15,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:15,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-12 09:41:15,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978731386] [2020-11-12 09:41:15,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-12 09:41:15,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:15,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-12 09:41:15,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-11-12 09:41:15,525 INFO L87 Difference]: Start difference. First operand 942 states and 1242 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:16,025 INFO L93 Difference]: Finished difference Result 1446 states and 1797 transitions. [2020-11-12 09:41:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-12 09:41:16,026 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-12 09:41:16,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:16,028 INFO L225 Difference]: With dead ends: 1446 [2020-11-12 09:41:16,028 INFO L226 Difference]: Without dead ends: 1204 [2020-11-12 09:41:16,029 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2020-11-12 09:41:16,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2020-11-12 09:41:16,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 965. [2020-11-12 09:41:16,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 901 states have (on average 1.4106548279689235) internal successors, (1271), 964 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:16,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1271 transitions. [2020-11-12 09:41:16,045 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1271 transitions. Word has length 76 [2020-11-12 09:41:16,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:16,045 INFO L481 AbstractCegarLoop]: Abstraction has 965 states and 1271 transitions. [2020-11-12 09:41:16,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:16,046 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1271 transitions. [2020-11-12 09:41:16,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-12 09:41:16,048 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:16,048 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:16,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-12 09:41:16,262 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:16,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:16,263 INFO L82 PathProgramCache]: Analyzing trace with hash 808920381, now seen corresponding path program 24 times [2020-11-12 09:41:16,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:16,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996308134] [2020-11-12 09:41:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:16,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996308134] [2020-11-12 09:41:16,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348445678] [2020-11-12 09:41:16,513 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 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 [2020-11-12 09:41:16,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-12 09:41:16,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:16,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-12 09:41:16,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:16,643 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:16,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:16,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:16,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-12 09:41:16,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563350610] [2020-11-12 09:41:16,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-12 09:41:16,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:16,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-12 09:41:16,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-11-12 09:41:16,712 INFO L87 Difference]: Start difference. First operand 965 states and 1271 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:17,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:17,258 INFO L93 Difference]: Finished difference Result 1447 states and 1799 transitions. [2020-11-12 09:41:17,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-12 09:41:17,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-12 09:41:17,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:17,264 INFO L225 Difference]: With dead ends: 1447 [2020-11-12 09:41:17,264 INFO L226 Difference]: Without dead ends: 1205 [2020-11-12 09:41:17,267 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2020-11-12 09:41:17,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2020-11-12 09:41:17,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 979. [2020-11-12 09:41:17,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 915 states have (on average 1.4087431693989072) internal successors, (1289), 978 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:17,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1289 transitions. [2020-11-12 09:41:17,289 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1289 transitions. Word has length 76 [2020-11-12 09:41:17,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:17,289 INFO L481 AbstractCegarLoop]: Abstraction has 979 states and 1289 transitions. [2020-11-12 09:41:17,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:17,289 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1289 transitions. [2020-11-12 09:41:17,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-12 09:41:17,291 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:17,291 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:17,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:41:17,506 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:17,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:17,507 INFO L82 PathProgramCache]: Analyzing trace with hash -448787459, now seen corresponding path program 25 times [2020-11-12 09:41:17,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:17,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274523687] [2020-11-12 09:41:17,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:17,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274523687] [2020-11-12 09:41:17,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494350937] [2020-11-12 09:41:17,733 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 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 [2020-11-12 09:41:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:17,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-12 09:41:17,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:17,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:17,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:17,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:17,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-12 09:41:17,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913402035] [2020-11-12 09:41:17,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-12 09:41:17,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:17,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-12 09:41:17,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-11-12 09:41:17,912 INFO L87 Difference]: Start difference. First operand 979 states and 1289 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:18,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:18,593 INFO L93 Difference]: Finished difference Result 1439 states and 1791 transitions. [2020-11-12 09:41:18,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-12 09:41:18,593 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-12 09:41:18,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:18,595 INFO L225 Difference]: With dead ends: 1439 [2020-11-12 09:41:18,595 INFO L226 Difference]: Without dead ends: 1197 [2020-11-12 09:41:18,596 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2020-11-12 09:41:18,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2020-11-12 09:41:18,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 993. [2020-11-12 09:41:18,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 929 states have (on average 1.4068891280947255) internal successors, (1307), 992 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:18,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1307 transitions. [2020-11-12 09:41:18,611 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1307 transitions. Word has length 76 [2020-11-12 09:41:18,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:18,611 INFO L481 AbstractCegarLoop]: Abstraction has 993 states and 1307 transitions. [2020-11-12 09:41:18,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:18,612 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1307 transitions. [2020-11-12 09:41:18,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-12 09:41:18,613 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:18,613 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:18,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-12 09:41:18,827 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:18,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:18,828 INFO L82 PathProgramCache]: Analyzing trace with hash -823016771, now seen corresponding path program 26 times [2020-11-12 09:41:18,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:18,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295869135] [2020-11-12 09:41:18,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:19,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295869135] [2020-11-12 09:41:19,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521985330] [2020-11-12 09:41:19,031 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 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 [2020-11-12 09:41:19,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:41:19,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:19,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-12 09:41:19,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:19,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:19,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:19,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:19,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-12 09:41:19,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391717739] [2020-11-12 09:41:19,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-12 09:41:19,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:19,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-12 09:41:19,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-11-12 09:41:19,205 INFO L87 Difference]: Start difference. First operand 993 states and 1307 transitions. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:20,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:20,052 INFO L93 Difference]: Finished difference Result 1828 states and 2213 transitions. [2020-11-12 09:41:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-12 09:41:20,052 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-12 09:41:20,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:20,054 INFO L225 Difference]: With dead ends: 1828 [2020-11-12 09:41:20,054 INFO L226 Difference]: Without dead ends: 1277 [2020-11-12 09:41:20,055 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2020-11-12 09:41:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2020-11-12 09:41:20,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1007. [2020-11-12 09:41:20,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 943 states have (on average 1.410392364793213) internal successors, (1330), 1006 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1330 transitions. [2020-11-12 09:41:20,068 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1330 transitions. Word has length 76 [2020-11-12 09:41:20,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:20,069 INFO L481 AbstractCegarLoop]: Abstraction has 1007 states and 1330 transitions. [2020-11-12 09:41:20,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:20,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1330 transitions. [2020-11-12 09:41:20,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-12 09:41:20,070 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:20,070 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:20,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:41:20,284 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:20,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:20,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1628118931, now seen corresponding path program 27 times [2020-11-12 09:41:20,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:20,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702542619] [2020-11-12 09:41:20,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:20,500 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:20,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702542619] [2020-11-12 09:41:20,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47271156] [2020-11-12 09:41:20,501 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 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 [2020-11-12 09:41:20,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-12 09:41:20,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:20,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-12 09:41:20,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:20,658 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:20,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:20,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-12 09:41:20,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557761615] [2020-11-12 09:41:20,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-12 09:41:20,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:20,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-12 09:41:20,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-11-12 09:41:20,678 INFO L87 Difference]: Start difference. First operand 1007 states and 1330 transitions. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:21,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:21,539 INFO L93 Difference]: Finished difference Result 1952 states and 2345 transitions. [2020-11-12 09:41:21,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-12 09:41:21,539 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2020-11-12 09:41:21,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:21,542 INFO L225 Difference]: With dead ends: 1952 [2020-11-12 09:41:21,542 INFO L226 Difference]: Without dead ends: 1218 [2020-11-12 09:41:21,543 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=405, Invalid=1317, Unknown=0, NotChecked=0, Total=1722 [2020-11-12 09:41:21,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2020-11-12 09:41:21,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 965. [2020-11-12 09:41:21,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 901 states have (on average 1.4106548279689235) internal successors, (1271), 964 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:21,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1271 transitions. [2020-11-12 09:41:21,563 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1271 transitions. Word has length 76 [2020-11-12 09:41:21,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:21,564 INFO L481 AbstractCegarLoop]: Abstraction has 965 states and 1271 transitions. [2020-11-12 09:41:21,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:21,564 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1271 transitions. [2020-11-12 09:41:21,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-12 09:41:21,566 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:21,566 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:21,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-12 09:41:21,779 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:21,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:21,782 INFO L82 PathProgramCache]: Analyzing trace with hash 623278674, now seen corresponding path program 28 times [2020-11-12 09:41:21,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:21,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705767036] [2020-11-12 09:41:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:22,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705767036] [2020-11-12 09:41:22,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693345133] [2020-11-12 09:41:22,233 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 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 [2020-11-12 09:41:22,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:41:22,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:22,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-12 09:41:22,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:22,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:22,429 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 4 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:22,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:22,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-12 09:41:22,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327898340] [2020-11-12 09:41:22,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 09:41:22,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:22,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 09:41:22,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-11-12 09:41:22,448 INFO L87 Difference]: Start difference. First operand 965 states and 1271 transitions. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:22,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:22,972 INFO L93 Difference]: Finished difference Result 1477 states and 1835 transitions. [2020-11-12 09:41:22,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-12 09:41:22,972 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-11-12 09:41:22,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:22,975 INFO L225 Difference]: With dead ends: 1477 [2020-11-12 09:41:22,975 INFO L226 Difference]: Without dead ends: 1235 [2020-11-12 09:41:22,976 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2020-11-12 09:41:22,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2020-11-12 09:41:22,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 979. [2020-11-12 09:41:22,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 915 states have (on average 1.4087431693989072) internal successors, (1289), 978 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:22,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1289 transitions. [2020-11-12 09:41:22,998 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1289 transitions. Word has length 81 [2020-11-12 09:41:22,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:22,998 INFO L481 AbstractCegarLoop]: Abstraction has 979 states and 1289 transitions. [2020-11-12 09:41:22,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:22,998 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1289 transitions. [2020-11-12 09:41:23,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-12 09:41:23,000 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:23,001 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:23,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:41:23,216 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:23,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:23,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1414394130, now seen corresponding path program 29 times [2020-11-12 09:41:23,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:23,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967843039] [2020-11-12 09:41:23,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:23,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967843039] [2020-11-12 09:41:23,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538862244] [2020-11-12 09:41:23,465 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 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 [2020-11-12 09:41:23,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-12 09:41:23,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:23,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-12 09:41:23,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:23,573 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:23,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 4 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:23,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:23,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-12 09:41:23,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37406020] [2020-11-12 09:41:23,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 09:41:23,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:23,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 09:41:23,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-11-12 09:41:23,649 INFO L87 Difference]: Start difference. First operand 979 states and 1289 transitions. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:24,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:24,308 INFO L93 Difference]: Finished difference Result 1478 states and 1837 transitions. [2020-11-12 09:41:24,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-12 09:41:24,308 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-11-12 09:41:24,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:24,311 INFO L225 Difference]: With dead ends: 1478 [2020-11-12 09:41:24,311 INFO L226 Difference]: Without dead ends: 1236 [2020-11-12 09:41:24,312 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2020-11-12 09:41:24,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2020-11-12 09:41:24,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 993. [2020-11-12 09:41:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 929 states have (on average 1.4068891280947255) internal successors, (1307), 992 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:24,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1307 transitions. [2020-11-12 09:41:24,330 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1307 transitions. Word has length 81 [2020-11-12 09:41:24,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:24,331 INFO L481 AbstractCegarLoop]: Abstraction has 993 states and 1307 transitions. [2020-11-12 09:41:24,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:24,331 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1307 transitions. [2020-11-12 09:41:24,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-12 09:41:24,333 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:24,333 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:24,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-12 09:41:24,549 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:24,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:24,550 INFO L82 PathProgramCache]: Analyzing trace with hash 156686290, now seen corresponding path program 30 times [2020-11-12 09:41:24,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:24,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335919422] [2020-11-12 09:41:24,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:24,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335919422] [2020-11-12 09:41:24,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589537279] [2020-11-12 09:41:24,785 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 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 [2020-11-12 09:41:24,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-12 09:41:24,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:24,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-12 09:41:24,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:24,909 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:24,958 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 4 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:24,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:24,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-12 09:41:24,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280011689] [2020-11-12 09:41:24,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 09:41:24,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:24,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 09:41:24,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-11-12 09:41:24,979 INFO L87 Difference]: Start difference. First operand 993 states and 1307 transitions. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:25,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:25,744 INFO L93 Difference]: Finished difference Result 1479 states and 1839 transitions. [2020-11-12 09:41:25,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-12 09:41:25,744 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-11-12 09:41:25,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:25,752 INFO L225 Difference]: With dead ends: 1479 [2020-11-12 09:41:25,752 INFO L226 Difference]: Without dead ends: 1237 [2020-11-12 09:41:25,753 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2020-11-12 09:41:25,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2020-11-12 09:41:25,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1007. [2020-11-12 09:41:25,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 943 states have (on average 1.4050901378579004) internal successors, (1325), 1006 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:25,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1325 transitions. [2020-11-12 09:41:25,779 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1325 transitions. Word has length 81 [2020-11-12 09:41:25,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:25,780 INFO L481 AbstractCegarLoop]: Abstraction has 1007 states and 1325 transitions. [2020-11-12 09:41:25,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:25,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1325 transitions. [2020-11-12 09:41:25,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-12 09:41:25,783 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:25,783 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:25,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-12 09:41:25,996 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:25,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:25,997 INFO L82 PathProgramCache]: Analyzing trace with hash -217543022, now seen corresponding path program 31 times [2020-11-12 09:41:25,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:25,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120580640] [2020-11-12 09:41:25,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:26,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:26,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120580640] [2020-11-12 09:41:26,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520447158] [2020-11-12 09:41:26,235 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 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 [2020-11-12 09:41:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:26,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-12 09:41:26,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:26,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:26,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 4 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:26,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:26,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-12 09:41:26,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133141841] [2020-11-12 09:41:26,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 09:41:26,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:26,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 09:41:26,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-11-12 09:41:26,400 INFO L87 Difference]: Start difference. First operand 1007 states and 1325 transitions. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:27,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:27,335 INFO L93 Difference]: Finished difference Result 1867 states and 2259 transitions. [2020-11-12 09:41:27,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-12 09:41:27,335 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-11-12 09:41:27,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:27,338 INFO L225 Difference]: With dead ends: 1867 [2020-11-12 09:41:27,339 INFO L226 Difference]: Without dead ends: 1316 [2020-11-12 09:41:27,340 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=463, Invalid=1429, Unknown=0, NotChecked=0, Total=1892 [2020-11-12 09:41:27,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2020-11-12 09:41:27,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1021. [2020-11-12 09:41:27,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 957 states have (on average 1.4085684430512018) internal successors, (1348), 1020 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:27,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1348 transitions. [2020-11-12 09:41:27,360 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1348 transitions. Word has length 81 [2020-11-12 09:41:27,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:27,360 INFO L481 AbstractCegarLoop]: Abstraction has 1021 states and 1348 transitions. [2020-11-12 09:41:27,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:27,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1348 transitions. [2020-11-12 09:41:27,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-12 09:41:27,362 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:27,362 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:27,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-12 09:41:27,575 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:27,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:27,576 INFO L82 PathProgramCache]: Analyzing trace with hash -2061374616, now seen corresponding path program 32 times [2020-11-12 09:41:27,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:27,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918397247] [2020-11-12 09:41:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:27,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918397247] [2020-11-12 09:41:27,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239317624] [2020-11-12 09:41:27,798 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 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 [2020-11-12 09:41:27,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:41:27,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:27,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-12 09:41:27,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:27,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:27,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:27,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-12 09:41:27,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395891278] [2020-11-12 09:41:27,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-12 09:41:27,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:27,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-12 09:41:27,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-11-12 09:41:27,951 INFO L87 Difference]: Start difference. First operand 1021 states and 1348 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:28,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:28,975 INFO L93 Difference]: Finished difference Result 2015 states and 2412 transitions. [2020-11-12 09:41:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-12 09:41:28,975 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2020-11-12 09:41:28,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:28,978 INFO L225 Difference]: With dead ends: 2015 [2020-11-12 09:41:28,978 INFO L226 Difference]: Without dead ends: 1281 [2020-11-12 09:41:28,979 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=521, Invalid=1641, Unknown=0, NotChecked=0, Total=2162 [2020-11-12 09:41:28,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2020-11-12 09:41:28,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 963. [2020-11-12 09:41:28,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 899 states have (on average 1.4104560622914348) internal successors, (1268), 962 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:28,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1268 transitions. [2020-11-12 09:41:28,999 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1268 transitions. Word has length 81 [2020-11-12 09:41:29,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:29,000 INFO L481 AbstractCegarLoop]: Abstraction has 963 states and 1268 transitions. [2020-11-12 09:41:29,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:29,000 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1268 transitions. [2020-11-12 09:41:29,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-12 09:41:29,002 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:29,002 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:29,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-12 09:41:29,217 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:29,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:29,218 INFO L82 PathProgramCache]: Analyzing trace with hash -768576216, now seen corresponding path program 33 times [2020-11-12 09:41:29,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:29,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295385091] [2020-11-12 09:41:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:29,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295385091] [2020-11-12 09:41:29,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957451537] [2020-11-12 09:41:29,513 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 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 [2020-11-12 09:41:29,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-12 09:41:29,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:29,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-12 09:41:29,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:29,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:29,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:29,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:29,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 21 [2020-11-12 09:41:29,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525539603] [2020-11-12 09:41:29,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:41:29,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:29,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:41:29,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:41:29,704 INFO L87 Difference]: Start difference. First operand 963 states and 1268 transitions. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:30,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:30,245 INFO L93 Difference]: Finished difference Result 1746 states and 2141 transitions. [2020-11-12 09:41:30,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-12 09:41:30,246 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-12 09:41:30,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:30,251 INFO L225 Difference]: With dead ends: 1746 [2020-11-12 09:41:30,251 INFO L226 Difference]: Without dead ends: 1504 [2020-11-12 09:41:30,252 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-11-12 09:41:30,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2020-11-12 09:41:30,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 973. [2020-11-12 09:41:30,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 909 states have (on average 1.4081408140814082) internal successors, (1280), 972 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:30,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1280 transitions. [2020-11-12 09:41:30,273 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1280 transitions. Word has length 86 [2020-11-12 09:41:30,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:30,273 INFO L481 AbstractCegarLoop]: Abstraction has 973 states and 1280 transitions. [2020-11-12 09:41:30,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:30,274 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1280 transitions. [2020-11-12 09:41:30,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-12 09:41:30,275 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:30,275 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:30,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:41:30,490 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:30,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:30,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1923284328, now seen corresponding path program 34 times [2020-11-12 09:41:30,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:30,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924999514] [2020-11-12 09:41:30,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:30,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924999514] [2020-11-12 09:41:30,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273889201] [2020-11-12 09:41:30,824 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 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 [2020-11-12 09:41:30,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:41:30,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:30,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-12 09:41:30,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:30,934 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:30,978 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 1 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:30,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:30,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-12 09:41:30,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049530933] [2020-11-12 09:41:30,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 09:41:30,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:30,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 09:41:30,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-11-12 09:41:30,997 INFO L87 Difference]: Start difference. First operand 973 states and 1280 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:31,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:31,576 INFO L93 Difference]: Finished difference Result 1519 states and 1883 transitions. [2020-11-12 09:41:31,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-12 09:41:31,577 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-12 09:41:31,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:31,580 INFO L225 Difference]: With dead ends: 1519 [2020-11-12 09:41:31,580 INFO L226 Difference]: Without dead ends: 1277 [2020-11-12 09:41:31,580 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2020-11-12 09:41:31,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2020-11-12 09:41:31,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 996. [2020-11-12 09:41:31,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 932 states have (on average 1.4045064377682404) internal successors, (1309), 995 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:31,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1309 transitions. [2020-11-12 09:41:31,593 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1309 transitions. Word has length 86 [2020-11-12 09:41:31,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:31,593 INFO L481 AbstractCegarLoop]: Abstraction has 996 states and 1309 transitions. [2020-11-12 09:41:31,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:31,594 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1309 transitions. [2020-11-12 09:41:31,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-12 09:41:31,595 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:31,595 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:31,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-12 09:41:31,797 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:31,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:31,798 INFO L82 PathProgramCache]: Analyzing trace with hash 854918184, now seen corresponding path program 35 times [2020-11-12 09:41:31,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:31,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582805692] [2020-11-12 09:41:31,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:32,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582805692] [2020-11-12 09:41:32,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274800507] [2020-11-12 09:41:32,090 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 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 [2020-11-12 09:41:32,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-12 09:41:32,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:32,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-12 09:41:32,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:32,214 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:32,259 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:32,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:32,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-12 09:41:32,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373786275] [2020-11-12 09:41:32,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 09:41:32,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:32,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 09:41:32,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-11-12 09:41:32,278 INFO L87 Difference]: Start difference. First operand 996 states and 1309 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:32,946 INFO L93 Difference]: Finished difference Result 1520 states and 1885 transitions. [2020-11-12 09:41:32,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-12 09:41:32,946 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-12 09:41:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:32,948 INFO L225 Difference]: With dead ends: 1520 [2020-11-12 09:41:32,948 INFO L226 Difference]: Without dead ends: 1278 [2020-11-12 09:41:32,949 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2020-11-12 09:41:32,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2020-11-12 09:41:32,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1010. [2020-11-12 09:41:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 946 states have (on average 1.4027484143763214) internal successors, (1327), 1009 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:32,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1327 transitions. [2020-11-12 09:41:32,969 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1327 transitions. Word has length 86 [2020-11-12 09:41:32,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:32,970 INFO L481 AbstractCegarLoop]: Abstraction has 1010 states and 1327 transitions. [2020-11-12 09:41:32,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:32,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1327 transitions. [2020-11-12 09:41:32,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-12 09:41:32,972 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:32,972 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:33,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-11-12 09:41:33,186 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:33,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:33,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1646033640, now seen corresponding path program 36 times [2020-11-12 09:41:33,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:33,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153346536] [2020-11-12 09:41:33,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:33,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153346536] [2020-11-12 09:41:33,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818332229] [2020-11-12 09:41:33,454 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 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 [2020-11-12 09:41:33,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-12 09:41:33,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:33,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-12 09:41:33,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:33,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:33,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:33,642 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:33,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:33,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-12 09:41:33,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517687945] [2020-11-12 09:41:33,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 09:41:33,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:33,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 09:41:33,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-11-12 09:41:33,644 INFO L87 Difference]: Start difference. First operand 1010 states and 1327 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:34,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:34,431 INFO L93 Difference]: Finished difference Result 1512 states and 1877 transitions. [2020-11-12 09:41:34,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-12 09:41:34,431 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-12 09:41:34,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:34,433 INFO L225 Difference]: With dead ends: 1512 [2020-11-12 09:41:34,433 INFO L226 Difference]: Without dead ends: 1270 [2020-11-12 09:41:34,434 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2020-11-12 09:41:34,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2020-11-12 09:41:34,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1024. [2020-11-12 09:41:34,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 960 states have (on average 1.4010416666666667) internal successors, (1345), 1023 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1345 transitions. [2020-11-12 09:41:34,450 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1345 transitions. Word has length 86 [2020-11-12 09:41:34,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:34,450 INFO L481 AbstractCegarLoop]: Abstraction has 1024 states and 1345 transitions. [2020-11-12 09:41:34,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:34,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1345 transitions. [2020-11-12 09:41:34,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-12 09:41:34,452 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:34,452 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:34,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:41:34,666 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:34,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:34,667 INFO L82 PathProgramCache]: Analyzing trace with hash 388325800, now seen corresponding path program 37 times [2020-11-12 09:41:34,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:34,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628843616] [2020-11-12 09:41:34,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:34,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628843616] [2020-11-12 09:41:34,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140184969] [2020-11-12 09:41:34,917 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 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 [2020-11-12 09:41:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:34,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-12 09:41:34,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:35,029 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:35,070 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:35,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:35,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-12 09:41:35,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313740342] [2020-11-12 09:41:35,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 09:41:35,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:35,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 09:41:35,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-11-12 09:41:35,087 INFO L87 Difference]: Start difference. First operand 1024 states and 1345 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:35,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:35,952 INFO L93 Difference]: Finished difference Result 1504 states and 1869 transitions. [2020-11-12 09:41:35,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-12 09:41:35,952 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-12 09:41:35,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:35,955 INFO L225 Difference]: With dead ends: 1504 [2020-11-12 09:41:35,955 INFO L226 Difference]: Without dead ends: 1262 [2020-11-12 09:41:35,956 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=443, Invalid=1363, Unknown=0, NotChecked=0, Total=1806 [2020-11-12 09:41:35,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2020-11-12 09:41:35,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1038. [2020-11-12 09:41:35,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 974 states have (on average 1.3993839835728952) internal successors, (1363), 1037 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:35,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1363 transitions. [2020-11-12 09:41:35,976 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1363 transitions. Word has length 86 [2020-11-12 09:41:35,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:35,977 INFO L481 AbstractCegarLoop]: Abstraction has 1038 states and 1363 transitions. [2020-11-12 09:41:35,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:35,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1363 transitions. [2020-11-12 09:41:35,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-12 09:41:35,979 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:35,979 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:36,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-11-12 09:41:36,194 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:36,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:36,195 INFO L82 PathProgramCache]: Analyzing trace with hash 14096488, now seen corresponding path program 38 times [2020-11-12 09:41:36,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:36,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338650537] [2020-11-12 09:41:36,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:36,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338650537] [2020-11-12 09:41:36,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044416280] [2020-11-12 09:41:36,430 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 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 [2020-11-12 09:41:36,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:41:36,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:36,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-12 09:41:36,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:36,540 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:36,584 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:36,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:36,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-12 09:41:36,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988335972] [2020-11-12 09:41:36,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 09:41:36,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:36,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 09:41:36,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-11-12 09:41:36,594 INFO L87 Difference]: Start difference. First operand 1038 states and 1363 transitions. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:37,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:37,648 INFO L93 Difference]: Finished difference Result 1893 states and 2291 transitions. [2020-11-12 09:41:37,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-12 09:41:37,648 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-12 09:41:37,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:37,653 INFO L225 Difference]: With dead ends: 1893 [2020-11-12 09:41:37,653 INFO L226 Difference]: Without dead ends: 1342 [2020-11-12 09:41:37,655 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=534, Invalid=1628, Unknown=0, NotChecked=0, Total=2162 [2020-11-12 09:41:37,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2020-11-12 09:41:37,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1052. [2020-11-12 09:41:37,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 988 states have (on average 1.402834008097166) internal successors, (1386), 1051 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:37,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1386 transitions. [2020-11-12 09:41:37,674 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1386 transitions. Word has length 86 [2020-11-12 09:41:37,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:37,675 INFO L481 AbstractCegarLoop]: Abstraction has 1052 states and 1386 transitions. [2020-11-12 09:41:37,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:37,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1386 transitions. [2020-11-12 09:41:37,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-12 09:41:37,676 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:37,677 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:37,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:41:37,890 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:37,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:37,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1829735106, now seen corresponding path program 39 times [2020-11-12 09:41:37,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:37,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420069604] [2020-11-12 09:41:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:38,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420069604] [2020-11-12 09:41:38,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261965633] [2020-11-12 09:41:38,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 09:41:38,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-12 09:41:38,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:38,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-12 09:41:38,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:38,307 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:38,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:38,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-12 09:41:38,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376126207] [2020-11-12 09:41:38,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 09:41:38,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:38,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 09:41:38,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-11-12 09:41:38,321 INFO L87 Difference]: Start difference. First operand 1052 states and 1386 transitions. Second operand has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:39,423 INFO L93 Difference]: Finished difference Result 2017 states and 2423 transitions. [2020-11-12 09:41:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-12 09:41:39,424 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-12 09:41:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:39,426 INFO L225 Difference]: With dead ends: 2017 [2020-11-12 09:41:39,426 INFO L226 Difference]: Without dead ends: 1283 [2020-11-12 09:41:39,428 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=532, Invalid=1724, Unknown=0, NotChecked=0, Total=2256 [2020-11-12 09:41:39,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2020-11-12 09:41:39,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 996. [2020-11-12 09:41:39,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 932 states have (on average 1.4045064377682404) internal successors, (1309), 995 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:39,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1309 transitions. [2020-11-12 09:41:39,446 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1309 transitions. Word has length 86 [2020-11-12 09:41:39,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:39,447 INFO L481 AbstractCegarLoop]: Abstraction has 996 states and 1309 transitions. [2020-11-12 09:41:39,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1309 transitions. [2020-11-12 09:41:39,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-12 09:41:39,448 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:39,449 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:39,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-11-12 09:41:39,664 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:39,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:39,665 INFO L82 PathProgramCache]: Analyzing trace with hash 792773373, now seen corresponding path program 40 times [2020-11-12 09:41:39,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:39,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300802001] [2020-11-12 09:41:39,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:39,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300802001] [2020-11-12 09:41:39,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207920526] [2020-11-12 09:41:39,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 09:41:40,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:41:40,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:40,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-12 09:41:40,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:40,096 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:40,154 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:40,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:40,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-12 09:41:40,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499168201] [2020-11-12 09:41:40,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:41:40,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:40,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:41:40,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:41:40,174 INFO L87 Difference]: Start difference. First operand 996 states and 1309 transitions. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:40,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:40,827 INFO L93 Difference]: Finished difference Result 1550 states and 1921 transitions. [2020-11-12 09:41:40,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-12 09:41:40,828 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2020-11-12 09:41:40,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:40,829 INFO L225 Difference]: With dead ends: 1550 [2020-11-12 09:41:40,830 INFO L226 Difference]: Without dead ends: 1308 [2020-11-12 09:41:40,830 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2020-11-12 09:41:40,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2020-11-12 09:41:40,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1010. [2020-11-12 09:41:40,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 946 states have (on average 1.4027484143763214) internal successors, (1327), 1009 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:40,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1327 transitions. [2020-11-12 09:41:40,849 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1327 transitions. Word has length 91 [2020-11-12 09:41:40,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:40,850 INFO L481 AbstractCegarLoop]: Abstraction has 1010 states and 1327 transitions. [2020-11-12 09:41:40,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:40,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1327 transitions. [2020-11-12 09:41:40,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-12 09:41:40,851 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:40,852 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:41,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:41:41,068 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:41,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:41,068 INFO L82 PathProgramCache]: Analyzing trace with hash -275592771, now seen corresponding path program 41 times [2020-11-12 09:41:41,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:41,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890066744] [2020-11-12 09:41:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:41,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890066744] [2020-11-12 09:41:41,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618301409] [2020-11-12 09:41:41,376 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 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 [2020-11-12 09:41:41,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-12 09:41:41,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:41,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-12 09:41:41,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:41,491 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:41,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:41,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:41,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-12 09:41:41,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103861268] [2020-11-12 09:41:41,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:41:41,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:41,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:41:41,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:41:41,563 INFO L87 Difference]: Start difference. First operand 1010 states and 1327 transitions. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:42,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:42,359 INFO L93 Difference]: Finished difference Result 1551 states and 1923 transitions. [2020-11-12 09:41:42,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-12 09:41:42,359 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2020-11-12 09:41:42,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:42,361 INFO L225 Difference]: With dead ends: 1551 [2020-11-12 09:41:42,361 INFO L226 Difference]: Without dead ends: 1309 [2020-11-12 09:41:42,362 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=407, Invalid=1315, Unknown=0, NotChecked=0, Total=1722 [2020-11-12 09:41:42,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2020-11-12 09:41:42,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1024. [2020-11-12 09:41:42,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 960 states have (on average 1.4010416666666667) internal successors, (1345), 1023 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:42,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1345 transitions. [2020-11-12 09:41:42,377 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1345 transitions. Word has length 91 [2020-11-12 09:41:42,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:42,377 INFO L481 AbstractCegarLoop]: Abstraction has 1024 states and 1345 transitions. [2020-11-12 09:41:42,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:42,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1345 transitions. [2020-11-12 09:41:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-12 09:41:42,379 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:42,379 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:42,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-12 09:41:42,592 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:42,593 INFO L82 PathProgramCache]: Analyzing trace with hash 515522685, now seen corresponding path program 42 times [2020-11-12 09:41:42,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:42,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714982600] [2020-11-12 09:41:42,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:42,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714982600] [2020-11-12 09:41:42,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302623023] [2020-11-12 09:41:42,895 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 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 [2020-11-12 09:41:42,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-12 09:41:42,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:42,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-12 09:41:42,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:43,043 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:43,086 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:43,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:43,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-12 09:41:43,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832707490] [2020-11-12 09:41:43,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:41:43,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:43,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:41:43,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:41:43,107 INFO L87 Difference]: Start difference. First operand 1024 states and 1345 transitions. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:44,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:44,015 INFO L93 Difference]: Finished difference Result 1552 states and 1925 transitions. [2020-11-12 09:41:44,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-12 09:41:44,015 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2020-11-12 09:41:44,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:44,017 INFO L225 Difference]: With dead ends: 1552 [2020-11-12 09:41:44,017 INFO L226 Difference]: Without dead ends: 1310 [2020-11-12 09:41:44,018 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=450, Invalid=1442, Unknown=0, NotChecked=0, Total=1892 [2020-11-12 09:41:44,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2020-11-12 09:41:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1038. [2020-11-12 09:41:44,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 974 states have (on average 1.3993839835728952) internal successors, (1363), 1037 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1363 transitions. [2020-11-12 09:41:44,031 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1363 transitions. Word has length 91 [2020-11-12 09:41:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:44,031 INFO L481 AbstractCegarLoop]: Abstraction has 1038 states and 1363 transitions. [2020-11-12 09:41:44,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1363 transitions. [2020-11-12 09:41:44,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-12 09:41:44,033 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:44,033 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:44,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-12 09:41:44,234 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:44,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:44,235 INFO L82 PathProgramCache]: Analyzing trace with hash -742185155, now seen corresponding path program 43 times [2020-11-12 09:41:44,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:44,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105725196] [2020-11-12 09:41:44,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:44,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105725196] [2020-11-12 09:41:44,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216053670] [2020-11-12 09:41:44,551 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 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 [2020-11-12 09:41:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:44,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-12 09:41:44,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:44,702 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:44,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:44,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:44,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-12 09:41:44,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100392069] [2020-11-12 09:41:44,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:41:44,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:44,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:41:44,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:41:44,768 INFO L87 Difference]: Start difference. First operand 1038 states and 1363 transitions. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:45,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:45,749 INFO L93 Difference]: Finished difference Result 1553 states and 1927 transitions. [2020-11-12 09:41:45,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-12 09:41:45,750 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2020-11-12 09:41:45,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:45,752 INFO L225 Difference]: With dead ends: 1553 [2020-11-12 09:41:45,753 INFO L226 Difference]: Without dead ends: 1311 [2020-11-12 09:41:45,754 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=509, Invalid=1561, Unknown=0, NotChecked=0, Total=2070 [2020-11-12 09:41:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2020-11-12 09:41:45,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1052. [2020-11-12 09:41:45,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 988 states have (on average 1.3977732793522266) internal successors, (1381), 1051 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:45,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1381 transitions. [2020-11-12 09:41:45,777 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1381 transitions. Word has length 91 [2020-11-12 09:41:45,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:45,778 INFO L481 AbstractCegarLoop]: Abstraction has 1052 states and 1381 transitions. [2020-11-12 09:41:45,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:45,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1381 transitions. [2020-11-12 09:41:45,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-12 09:41:45,780 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:45,780 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:45,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:41:45,995 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:45,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:45,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1116414467, now seen corresponding path program 44 times [2020-11-12 09:41:45,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:45,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004202446] [2020-11-12 09:41:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:46,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004202446] [2020-11-12 09:41:46,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694654125] [2020-11-12 09:41:46,266 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 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 [2020-11-12 09:41:46,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:41:46,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:46,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-12 09:41:46,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:46,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:46,443 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:46,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:46,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-12 09:41:46,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210549580] [2020-11-12 09:41:46,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:41:46,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:46,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:41:46,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:41:46,462 INFO L87 Difference]: Start difference. First operand 1052 states and 1381 transitions. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:47,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:47,605 INFO L93 Difference]: Finished difference Result 1941 states and 2347 transitions. [2020-11-12 09:41:47,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-12 09:41:47,605 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2020-11-12 09:41:47,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:47,607 INFO L225 Difference]: With dead ends: 1941 [2020-11-12 09:41:47,607 INFO L226 Difference]: Without dead ends: 1390 [2020-11-12 09:41:47,608 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=607, Invalid=1843, Unknown=0, NotChecked=0, Total=2450 [2020-11-12 09:41:47,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2020-11-12 09:41:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1066. [2020-11-12 09:41:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1002 states have (on average 1.401197604790419) internal successors, (1404), 1065 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:47,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1404 transitions. [2020-11-12 09:41:47,624 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1404 transitions. Word has length 91 [2020-11-12 09:41:47,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:47,624 INFO L481 AbstractCegarLoop]: Abstraction has 1066 states and 1404 transitions. [2020-11-12 09:41:47,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:47,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1404 transitions. [2020-11-12 09:41:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-12 09:41:47,626 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:47,626 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:47,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-11-12 09:41:47,841 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:47,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:47,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1334721235, now seen corresponding path program 45 times [2020-11-12 09:41:47,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:47,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109462989] [2020-11-12 09:41:47,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:48,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109462989] [2020-11-12 09:41:48,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097112730] [2020-11-12 09:41:48,132 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 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 [2020-11-12 09:41:48,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-12 09:41:48,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:48,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-12 09:41:48,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:48,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:48,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:48,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-12 09:41:48,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878083333] [2020-11-12 09:41:48,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:41:48,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:48,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:41:48,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:41:48,304 INFO L87 Difference]: Start difference. First operand 1066 states and 1404 transitions. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:49,526 INFO L93 Difference]: Finished difference Result 2089 states and 2500 transitions. [2020-11-12 09:41:49,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-12 09:41:49,527 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2020-11-12 09:41:49,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:49,528 INFO L225 Difference]: With dead ends: 2089 [2020-11-12 09:41:49,528 INFO L226 Difference]: Without dead ends: 1355 [2020-11-12 09:41:49,529 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=666, Invalid=2090, Unknown=0, NotChecked=0, Total=2756 [2020-11-12 09:41:49,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2020-11-12 09:41:49,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 994. [2020-11-12 09:41:49,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 930 states have (on average 1.4043010752688172) internal successors, (1306), 993 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:49,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1306 transitions. [2020-11-12 09:41:49,541 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1306 transitions. Word has length 91 [2020-11-12 09:41:49,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:49,542 INFO L481 AbstractCegarLoop]: Abstraction has 994 states and 1306 transitions. [2020-11-12 09:41:49,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:49,542 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1306 transitions. [2020-11-12 09:41:49,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-12 09:41:49,543 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:49,543 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:49,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:41:49,755 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:49,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:49,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1295537581, now seen corresponding path program 46 times [2020-11-12 09:41:49,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:49,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901416272] [2020-11-12 09:41:49,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:50,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901416272] [2020-11-12 09:41:50,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758020220] [2020-11-12 09:41:50,114 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 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 [2020-11-12 09:41:50,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:41:50,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:50,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-12 09:41:50,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:50,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:50,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:50,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:50,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-12 09:41:50,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723345145] [2020-11-12 09:41:50,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 09:41:50,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:50,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 09:41:50,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2020-11-12 09:41:50,301 INFO L87 Difference]: Start difference. First operand 994 states and 1306 transitions. Second operand has 22 states, 22 states have (on average 5.363636363636363) internal successors, (118), 22 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:50,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:50,959 INFO L93 Difference]: Finished difference Result 1791 states and 2195 transitions. [2020-11-12 09:41:50,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-12 09:41:50,960 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.363636363636363) internal successors, (118), 22 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-12 09:41:50,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:50,962 INFO L225 Difference]: With dead ends: 1791 [2020-11-12 09:41:50,963 INFO L226 Difference]: Without dead ends: 1549 [2020-11-12 09:41:50,963 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-11-12 09:41:50,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2020-11-12 09:41:50,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 1004. [2020-11-12 09:41:50,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 940 states have (on average 1.402127659574468) internal successors, (1318), 1003 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:50,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1318 transitions. [2020-11-12 09:41:50,977 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1318 transitions. Word has length 96 [2020-11-12 09:41:50,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:50,978 INFO L481 AbstractCegarLoop]: Abstraction has 1004 states and 1318 transitions. [2020-11-12 09:41:50,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.363636363636363) internal successors, (118), 22 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:50,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1318 transitions. [2020-11-12 09:41:50,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-12 09:41:50,979 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:50,979 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:51,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:41:51,180 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:51,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:51,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1529027949, now seen corresponding path program 47 times [2020-11-12 09:41:51,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:51,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955666194] [2020-11-12 09:41:51,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:51,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955666194] [2020-11-12 09:41:51,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650017842] [2020-11-12 09:41:51,566 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 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 [2020-11-12 09:41:51,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-12 09:41:51,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:51,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-12 09:41:51,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:51,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:51,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 1 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:51,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:51,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-12 09:41:51,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009859668] [2020-11-12 09:41:51,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:41:51,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:51,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:41:51,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:41:51,741 INFO L87 Difference]: Start difference. First operand 1004 states and 1318 transitions. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:52,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:52,454 INFO L93 Difference]: Finished difference Result 1592 states and 1969 transitions. [2020-11-12 09:41:52,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-12 09:41:52,455 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-12 09:41:52,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:52,457 INFO L225 Difference]: With dead ends: 1592 [2020-11-12 09:41:52,457 INFO L226 Difference]: Without dead ends: 1350 [2020-11-12 09:41:52,457 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2020-11-12 09:41:52,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2020-11-12 09:41:52,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1027. [2020-11-12 09:41:52,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 963 states have (on average 1.398753894080997) internal successors, (1347), 1026 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1347 transitions. [2020-11-12 09:41:52,470 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1347 transitions. Word has length 96 [2020-11-12 09:41:52,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:52,470 INFO L481 AbstractCegarLoop]: Abstraction has 1027 states and 1347 transitions. [2020-11-12 09:41:52,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:52,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1347 transitions. [2020-11-12 09:41:52,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-12 09:41:52,471 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:52,471 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:52,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-11-12 09:41:52,672 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:52,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:52,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1369081517, now seen corresponding path program 48 times [2020-11-12 09:41:52,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:52,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032605859] [2020-11-12 09:41:52,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:53,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032605859] [2020-11-12 09:41:53,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609919256] [2020-11-12 09:41:53,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 09:41:53,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-12 09:41:53,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:53,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-12 09:41:53,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:53,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:53,146 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 4 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:53,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:53,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-12 09:41:53,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460070298] [2020-11-12 09:41:53,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:41:53,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:53,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:41:53,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:41:53,161 INFO L87 Difference]: Start difference. First operand 1027 states and 1347 transitions. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:53,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:53,965 INFO L93 Difference]: Finished difference Result 1593 states and 1971 transitions. [2020-11-12 09:41:53,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-12 09:41:53,965 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-12 09:41:53,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:53,967 INFO L225 Difference]: With dead ends: 1593 [2020-11-12 09:41:53,967 INFO L226 Difference]: Without dead ends: 1351 [2020-11-12 09:41:53,967 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2020-11-12 09:41:53,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2020-11-12 09:41:53,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1041. [2020-11-12 09:41:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 977 states have (on average 1.3971340839303992) internal successors, (1365), 1040 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:53,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1365 transitions. [2020-11-12 09:41:53,980 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1365 transitions. Word has length 96 [2020-11-12 09:41:53,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:53,980 INFO L481 AbstractCegarLoop]: Abstraction has 1041 states and 1365 transitions. [2020-11-12 09:41:53,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:53,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1365 transitions. [2020-11-12 09:41:53,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-12 09:41:53,981 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:53,981 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:54,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:41:54,182 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:54,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:54,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1857519635, now seen corresponding path program 49 times [2020-11-12 09:41:54,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:54,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051441272] [2020-11-12 09:41:54,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:54,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051441272] [2020-11-12 09:41:54,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572713208] [2020-11-12 09:41:54,509 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 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 [2020-11-12 09:41:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:54,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-12 09:41:54,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:54,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:54,658 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 4 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:54,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:54,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-12 09:41:54,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726061106] [2020-11-12 09:41:54,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:41:54,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:54,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:41:54,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:41:54,673 INFO L87 Difference]: Start difference. First operand 1041 states and 1365 transitions. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:55,624 INFO L93 Difference]: Finished difference Result 1585 states and 1963 transitions. [2020-11-12 09:41:55,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-12 09:41:55,624 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-12 09:41:55,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:55,626 INFO L225 Difference]: With dead ends: 1585 [2020-11-12 09:41:55,626 INFO L226 Difference]: Without dead ends: 1343 [2020-11-12 09:41:55,627 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2020-11-12 09:41:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2020-11-12 09:41:55,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1055. [2020-11-12 09:41:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 991 states have (on average 1.3955600403632695) internal successors, (1383), 1054 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:55,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1383 transitions. [2020-11-12 09:41:55,643 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1383 transitions. Word has length 96 [2020-11-12 09:41:55,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:55,644 INFO L481 AbstractCegarLoop]: Abstraction has 1055 states and 1383 transitions. [2020-11-12 09:41:55,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:55,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1383 transitions. [2020-11-12 09:41:55,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-12 09:41:55,645 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:55,645 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:55,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-12 09:41:55,853 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:55,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:55,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1646332205, now seen corresponding path program 50 times [2020-11-12 09:41:55,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:55,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607009730] [2020-11-12 09:41:55,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:56,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607009730] [2020-11-12 09:41:56,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541969330] [2020-11-12 09:41:56,171 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 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 [2020-11-12 09:41:56,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:41:56,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:56,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-12 09:41:56,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:56,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:56,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 4 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:56,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:56,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-12 09:41:56,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597424792] [2020-11-12 09:41:56,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:41:56,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:56,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:41:56,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:41:56,327 INFO L87 Difference]: Start difference. First operand 1055 states and 1383 transitions. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:57,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:57,348 INFO L93 Difference]: Finished difference Result 1577 states and 1955 transitions. [2020-11-12 09:41:57,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-12 09:41:57,348 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-12 09:41:57,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:57,351 INFO L225 Difference]: With dead ends: 1577 [2020-11-12 09:41:57,351 INFO L226 Difference]: Without dead ends: 1335 [2020-11-12 09:41:57,351 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2020-11-12 09:41:57,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2020-11-12 09:41:57,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1069. [2020-11-12 09:41:57,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1005 states have (on average 1.3940298507462687) internal successors, (1401), 1068 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1401 transitions. [2020-11-12 09:41:57,373 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1401 transitions. Word has length 96 [2020-11-12 09:41:57,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:57,373 INFO L481 AbstractCegarLoop]: Abstraction has 1069 states and 1401 transitions. [2020-11-12 09:41:57,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:57,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1401 transitions. [2020-11-12 09:41:57,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-12 09:41:57,375 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:57,375 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:57,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-12 09:41:57,589 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:57,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:57,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1390927251, now seen corresponding path program 51 times [2020-11-12 09:41:57,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:57,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117275490] [2020-11-12 09:41:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:57,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117275490] [2020-11-12 09:41:57,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374429037] [2020-11-12 09:41:57,897 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 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 [2020-11-12 09:41:57,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-12 09:41:57,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:57,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-12 09:41:57,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:58,047 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 4 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:58,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:58,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-12 09:41:58,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382488270] [2020-11-12 09:41:58,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:41:58,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:58,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:41:58,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:41:58,063 INFO L87 Difference]: Start difference. First operand 1069 states and 1401 transitions. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:59,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:41:59,122 INFO L93 Difference]: Finished difference Result 1567 states and 1945 transitions. [2020-11-12 09:41:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-12 09:41:59,123 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-12 09:41:59,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:41:59,124 INFO L225 Difference]: With dead ends: 1567 [2020-11-12 09:41:59,124 INFO L226 Difference]: Without dead ends: 1325 [2020-11-12 09:41:59,124 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2020-11-12 09:41:59,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2020-11-12 09:41:59,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1083. [2020-11-12 09:41:59,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1019 states have (on average 1.392541707556428) internal successors, (1419), 1082 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1419 transitions. [2020-11-12 09:41:59,137 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1419 transitions. Word has length 96 [2020-11-12 09:41:59,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:41:59,137 INFO L481 AbstractCegarLoop]: Abstraction has 1083 states and 1419 transitions. [2020-11-12 09:41:59,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:41:59,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1419 transitions. [2020-11-12 09:41:59,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-12 09:41:59,138 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:41:59,138 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:41:59,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-12 09:41:59,339 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:41:59,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:41:59,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1016697939, now seen corresponding path program 52 times [2020-11-12 09:41:59,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:41:59,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928095487] [2020-11-12 09:41:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:41:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:41:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:59,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928095487] [2020-11-12 09:41:59,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505854415] [2020-11-12 09:41:59,623 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 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 [2020-11-12 09:41:59,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:41:59,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:41:59,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-12 09:41:59,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:41:59,804 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:41:59,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:41:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 4 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:41:59,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:41:59,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-12 09:41:59,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093790386] [2020-11-12 09:41:59,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:41:59,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:41:59,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:41:59,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:41:59,856 INFO L87 Difference]: Start difference. First operand 1083 states and 1419 transitions. Second operand has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:01,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:01,298 INFO L93 Difference]: Finished difference Result 1958 states and 2369 transitions. [2020-11-12 09:42:01,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-12 09:42:01,298 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-12 09:42:01,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:01,300 INFO L225 Difference]: With dead ends: 1958 [2020-11-12 09:42:01,300 INFO L226 Difference]: Without dead ends: 1407 [2020-11-12 09:42:01,300 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=665, Invalid=1987, Unknown=0, NotChecked=0, Total=2652 [2020-11-12 09:42:01,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2020-11-12 09:42:01,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1097. [2020-11-12 09:42:01,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1033 states have (on average 1.3959341723136496) internal successors, (1442), 1096 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:01,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1442 transitions. [2020-11-12 09:42:01,314 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1442 transitions. Word has length 96 [2020-11-12 09:42:01,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:01,314 INFO L481 AbstractCegarLoop]: Abstraction has 1097 states and 1442 transitions. [2020-11-12 09:42:01,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:01,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1442 transitions. [2020-11-12 09:42:01,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-12 09:42:01,316 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:01,316 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:01,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-12 09:42:01,518 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:01,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:01,519 INFO L82 PathProgramCache]: Analyzing trace with hash -827133655, now seen corresponding path program 53 times [2020-11-12 09:42:01,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:01,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297235813] [2020-11-12 09:42:01,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:01,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297235813] [2020-11-12 09:42:01,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128659291] [2020-11-12 09:42:01,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 09:42:01,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-12 09:42:01,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:01,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-12 09:42:01,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:01,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:01,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:01,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:01,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-12 09:42:01,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743048085] [2020-11-12 09:42:01,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 09:42:01,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:01,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 09:42:01,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:42:01,955 INFO L87 Difference]: Start difference. First operand 1097 states and 1442 transitions. Second operand has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:03,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:03,199 INFO L93 Difference]: Finished difference Result 1870 states and 2330 transitions. [2020-11-12 09:42:03,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-12 09:42:03,200 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2020-11-12 09:42:03,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:03,202 INFO L225 Difference]: With dead ends: 1870 [2020-11-12 09:42:03,202 INFO L226 Difference]: Without dead ends: 1334 [2020-11-12 09:42:03,202 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-11-12 09:42:03,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2020-11-12 09:42:03,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 1027. [2020-11-12 09:42:03,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 963 states have (on average 1.398753894080997) internal successors, (1347), 1026 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:03,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1347 transitions. [2020-11-12 09:42:03,215 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1347 transitions. Word has length 96 [2020-11-12 09:42:03,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:03,215 INFO L481 AbstractCegarLoop]: Abstraction has 1027 states and 1347 transitions. [2020-11-12 09:42:03,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 20 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:03,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1347 transitions. [2020-11-12 09:42:03,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-12 09:42:03,216 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:03,217 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:03,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:42:03,417 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:03,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:03,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1478200856, now seen corresponding path program 54 times [2020-11-12 09:42:03,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:03,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964100922] [2020-11-12 09:42:03,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:03,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964100922] [2020-11-12 09:42:03,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133874598] [2020-11-12 09:42:03,797 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 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 [2020-11-12 09:42:03,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-12 09:42:03,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:03,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-12 09:42:03,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:03,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:03,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 4 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:04,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:04,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-12 09:42:04,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471068561] [2020-11-12 09:42:04,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 09:42:04,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:04,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 09:42:04,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-11-12 09:42:04,023 INFO L87 Difference]: Start difference. First operand 1027 states and 1347 transitions. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:04,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:04,803 INFO L93 Difference]: Finished difference Result 1623 states and 2007 transitions. [2020-11-12 09:42:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-12 09:42:04,803 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-12 09:42:04,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:04,805 INFO L225 Difference]: With dead ends: 1623 [2020-11-12 09:42:04,805 INFO L226 Difference]: Without dead ends: 1381 [2020-11-12 09:42:04,805 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2020-11-12 09:42:04,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2020-11-12 09:42:04,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1041. [2020-11-12 09:42:04,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 977 states have (on average 1.3971340839303992) internal successors, (1365), 1040 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:04,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1365 transitions. [2020-11-12 09:42:04,825 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1365 transitions. Word has length 101 [2020-11-12 09:42:04,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:04,825 INFO L481 AbstractCegarLoop]: Abstraction has 1041 states and 1365 transitions. [2020-11-12 09:42:04,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:04,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1365 transitions. [2020-11-12 09:42:04,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-12 09:42:04,827 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:04,827 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:05,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:42:05,043 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:05,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:05,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1318254424, now seen corresponding path program 55 times [2020-11-12 09:42:05,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:05,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975820207] [2020-11-12 09:42:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:05,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975820207] [2020-11-12 09:42:05,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995421282] [2020-11-12 09:42:05,473 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 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 [2020-11-12 09:42:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:05,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-12 09:42:05,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:05,627 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:05,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 4 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:05,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:05,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-12 09:42:05,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850176771] [2020-11-12 09:42:05,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 09:42:05,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:05,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 09:42:05,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-11-12 09:42:05,711 INFO L87 Difference]: Start difference. First operand 1041 states and 1365 transitions. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:06,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:06,615 INFO L93 Difference]: Finished difference Result 1624 states and 2009 transitions. [2020-11-12 09:42:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-12 09:42:06,616 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-12 09:42:06,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:06,617 INFO L225 Difference]: With dead ends: 1624 [2020-11-12 09:42:06,617 INFO L226 Difference]: Without dead ends: 1382 [2020-11-12 09:42:06,618 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2020-11-12 09:42:06,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2020-11-12 09:42:06,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1055. [2020-11-12 09:42:06,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 991 states have (on average 1.3955600403632695) internal successors, (1383), 1054 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1383 transitions. [2020-11-12 09:42:06,635 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1383 transitions. Word has length 101 [2020-11-12 09:42:06,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:06,635 INFO L481 AbstractCegarLoop]: Abstraction has 1055 states and 1383 transitions. [2020-11-12 09:42:06,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1383 transitions. [2020-11-12 09:42:06,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-12 09:42:06,637 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:06,637 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:06,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:42:06,838 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:06,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:06,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1908346728, now seen corresponding path program 56 times [2020-11-12 09:42:06,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:06,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701545736] [2020-11-12 09:42:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:07,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701545736] [2020-11-12 09:42:07,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808831264] [2020-11-12 09:42:07,212 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 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 [2020-11-12 09:42:07,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:42:07,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:07,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-12 09:42:07,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:07,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:07,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 4 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:07,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:07,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-12 09:42:07,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553139621] [2020-11-12 09:42:07,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 09:42:07,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:07,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 09:42:07,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2020-11-12 09:42:07,415 INFO L87 Difference]: Start difference. First operand 1055 states and 1383 transitions. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:08,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:08,422 INFO L93 Difference]: Finished difference Result 1625 states and 2011 transitions. [2020-11-12 09:42:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-12 09:42:08,422 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-12 09:42:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:08,424 INFO L225 Difference]: With dead ends: 1625 [2020-11-12 09:42:08,424 INFO L226 Difference]: Without dead ends: 1383 [2020-11-12 09:42:08,425 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2020-11-12 09:42:08,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2020-11-12 09:42:08,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1069. [2020-11-12 09:42:08,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1005 states have (on average 1.3940298507462687) internal successors, (1401), 1068 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:08,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1401 transitions. [2020-11-12 09:42:08,441 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1401 transitions. Word has length 101 [2020-11-12 09:42:08,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:08,442 INFO L481 AbstractCegarLoop]: Abstraction has 1069 states and 1401 transitions. [2020-11-12 09:42:08,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:08,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1401 transitions. [2020-11-12 09:42:08,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-12 09:42:08,443 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:08,444 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:08,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-11-12 09:42:08,645 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:08,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:08,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1595505112, now seen corresponding path program 57 times [2020-11-12 09:42:08,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:08,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794739679] [2020-11-12 09:42:08,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:08,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794739679] [2020-11-12 09:42:08,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812497820] [2020-11-12 09:42:08,980 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 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 [2020-11-12 09:42:09,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-12 09:42:09,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:09,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-12 09:42:09,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:09,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:09,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 4 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:09,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:09,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-12 09:42:09,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669775027] [2020-11-12 09:42:09,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 09:42:09,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:09,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 09:42:09,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2020-11-12 09:42:09,184 INFO L87 Difference]: Start difference. First operand 1069 states and 1401 transitions. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:10,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:10,264 INFO L93 Difference]: Finished difference Result 1626 states and 2013 transitions. [2020-11-12 09:42:10,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-12 09:42:10,264 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-12 09:42:10,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:10,266 INFO L225 Difference]: With dead ends: 1626 [2020-11-12 09:42:10,266 INFO L226 Difference]: Without dead ends: 1384 [2020-11-12 09:42:10,266 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=588, Invalid=1862, Unknown=0, NotChecked=0, Total=2450 [2020-11-12 09:42:10,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2020-11-12 09:42:10,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1083. [2020-11-12 09:42:10,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1019 states have (on average 1.392541707556428) internal successors, (1419), 1082 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:10,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1419 transitions. [2020-11-12 09:42:10,280 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1419 transitions. Word has length 101 [2020-11-12 09:42:10,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:10,281 INFO L481 AbstractCegarLoop]: Abstraction has 1083 states and 1419 transitions. [2020-11-12 09:42:10,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:10,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1419 transitions. [2020-11-12 09:42:10,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-12 09:42:10,283 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:10,283 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:10,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:42:10,498 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:10,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:10,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1441754344, now seen corresponding path program 58 times [2020-11-12 09:42:10,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:10,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450589537] [2020-11-12 09:42:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:10,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450589537] [2020-11-12 09:42:10,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574018425] [2020-11-12 09:42:10,852 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 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 [2020-11-12 09:42:10,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:42:10,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:10,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-12 09:42:10,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:10,985 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:11,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:11,055 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 4 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:11,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:11,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-12 09:42:11,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832964635] [2020-11-12 09:42:11,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 09:42:11,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:11,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 09:42:11,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-11-12 09:42:11,058 INFO L87 Difference]: Start difference. First operand 1083 states and 1419 transitions. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:12,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:12,293 INFO L93 Difference]: Finished difference Result 1627 states and 2015 transitions. [2020-11-12 09:42:12,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-12 09:42:12,293 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-12 09:42:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:12,295 INFO L225 Difference]: With dead ends: 1627 [2020-11-12 09:42:12,295 INFO L226 Difference]: Without dead ends: 1385 [2020-11-12 09:42:12,295 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2020-11-12 09:42:12,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2020-11-12 09:42:12,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1097. [2020-11-12 09:42:12,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1033 states have (on average 1.3910939012584704) internal successors, (1437), 1096 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:12,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1437 transitions. [2020-11-12 09:42:12,311 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1437 transitions. Word has length 101 [2020-11-12 09:42:12,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:12,311 INFO L481 AbstractCegarLoop]: Abstraction has 1097 states and 1437 transitions. [2020-11-12 09:42:12,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:12,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1437 transitions. [2020-11-12 09:42:12,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-12 09:42:12,312 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:12,312 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:12,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-11-12 09:42:12,513 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:12,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:12,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1067525032, now seen corresponding path program 59 times [2020-11-12 09:42:12,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:12,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456334454] [2020-11-12 09:42:12,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:12,837 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:12,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456334454] [2020-11-12 09:42:12,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90012960] [2020-11-12 09:42:12,838 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 [2020-11-12 09:42:12,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-12 09:42:12,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:12,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-12 09:42:12,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:12,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:13,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 4 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:13,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:13,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-12 09:42:13,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610753901] [2020-11-12 09:42:13,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 09:42:13,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:13,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 09:42:13,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-11-12 09:42:13,020 INFO L87 Difference]: Start difference. First operand 1097 states and 1437 transitions. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:14,418 INFO L93 Difference]: Finished difference Result 1631 states and 2027 transitions. [2020-11-12 09:42:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-12 09:42:14,419 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-12 09:42:14,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:14,420 INFO L225 Difference]: With dead ends: 1631 [2020-11-12 09:42:14,420 INFO L226 Difference]: Without dead ends: 1417 [2020-11-12 09:42:14,421 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2020-11-12 09:42:14,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2020-11-12 09:42:14,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1111. [2020-11-12 09:42:14,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1047 states have (on average 1.3944603629417383) internal successors, (1460), 1110 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:14,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1460 transitions. [2020-11-12 09:42:14,443 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1460 transitions. Word has length 101 [2020-11-12 09:42:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:14,443 INFO L481 AbstractCegarLoop]: Abstraction has 1111 states and 1460 transitions. [2020-11-12 09:42:14,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:14,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1460 transitions. [2020-11-12 09:42:14,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-12 09:42:14,445 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:14,445 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:14,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:42:14,660 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:14,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:14,660 INFO L82 PathProgramCache]: Analyzing trace with hash -776306562, now seen corresponding path program 60 times [2020-11-12 09:42:14,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:14,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840793758] [2020-11-12 09:42:14,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:14,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840793758] [2020-11-12 09:42:14,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672805372] [2020-11-12 09:42:14,971 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 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 [2020-11-12 09:42:15,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-12 09:42:15,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:15,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-12 09:42:15,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:15,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:15,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:15,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-12 09:42:15,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413436136] [2020-11-12 09:42:15,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-12 09:42:15,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:15,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-12 09:42:15,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:42:15,136 INFO L87 Difference]: Start difference. First operand 1111 states and 1460 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:16,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:16,459 INFO L93 Difference]: Finished difference Result 1936 states and 2406 transitions. [2020-11-12 09:42:16,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-12 09:42:16,460 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-12 09:42:16,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:16,462 INFO L225 Difference]: With dead ends: 1936 [2020-11-12 09:42:16,462 INFO L226 Difference]: Without dead ends: 1400 [2020-11-12 09:42:16,463 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=770, Invalid=2200, Unknown=0, NotChecked=0, Total=2970 [2020-11-12 09:42:16,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2020-11-12 09:42:16,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1025. [2020-11-12 09:42:16,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 961 states have (on average 1.3985431841831426) internal successors, (1344), 1024 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:16,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1344 transitions. [2020-11-12 09:42:16,480 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1344 transitions. Word has length 101 [2020-11-12 09:42:16,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:16,480 INFO L481 AbstractCegarLoop]: Abstraction has 1025 states and 1344 transitions. [2020-11-12 09:42:16,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:16,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1344 transitions. [2020-11-12 09:42:16,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-12 09:42:16,481 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:16,481 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:16,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-11-12 09:42:16,682 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:16,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:16,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1577756094, now seen corresponding path program 61 times [2020-11-12 09:42:16,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:16,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610523606] [2020-11-12 09:42:16,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:17,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610523606] [2020-11-12 09:42:17,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767435111] [2020-11-12 09:42:17,099 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 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 [2020-11-12 09:42:17,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:17,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-12 09:42:17,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:17,239 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:17,298 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:17,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:17,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2020-11-12 09:42:17,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416787193] [2020-11-12 09:42:17,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-12 09:42:17,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:17,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-12 09:42:17,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2020-11-12 09:42:17,332 INFO L87 Difference]: Start difference. First operand 1025 states and 1344 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:18,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:18,172 INFO L93 Difference]: Finished difference Result 1836 states and 2249 transitions. [2020-11-12 09:42:18,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-12 09:42:18,173 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-12 09:42:18,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:18,175 INFO L225 Difference]: With dead ends: 1836 [2020-11-12 09:42:18,175 INFO L226 Difference]: Without dead ends: 1594 [2020-11-12 09:42:18,176 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=566, Invalid=1504, Unknown=0, NotChecked=0, Total=2070 [2020-11-12 09:42:18,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2020-11-12 09:42:18,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1035. [2020-11-12 09:42:18,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 971 states have (on average 1.396498455200824) internal successors, (1356), 1034 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:18,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1356 transitions. [2020-11-12 09:42:18,193 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1356 transitions. Word has length 106 [2020-11-12 09:42:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:18,193 INFO L481 AbstractCegarLoop]: Abstraction has 1035 states and 1356 transitions. [2020-11-12 09:42:18,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:18,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1356 transitions. [2020-11-12 09:42:18,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-12 09:42:18,195 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:18,195 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:18,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:42:18,397 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:18,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:18,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1171878402, now seen corresponding path program 62 times [2020-11-12 09:42:18,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:18,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670507188] [2020-11-12 09:42:18,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:18,907 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:18,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670507188] [2020-11-12 09:42:18,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460917111] [2020-11-12 09:42:18,908 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 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 [2020-11-12 09:42:18,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:42:18,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:18,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-12 09:42:18,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:19,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:19,084 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 1 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:19,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:19,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-12 09:42:19,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943422573] [2020-11-12 09:42:19,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:42:19,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:19,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:42:19,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:42:19,124 INFO L87 Difference]: Start difference. First operand 1035 states and 1356 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:19,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:19,919 INFO L93 Difference]: Finished difference Result 1665 states and 2055 transitions. [2020-11-12 09:42:19,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-12 09:42:19,920 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-12 09:42:19,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:19,922 INFO L225 Difference]: With dead ends: 1665 [2020-11-12 09:42:19,922 INFO L226 Difference]: Without dead ends: 1423 [2020-11-12 09:42:19,922 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2020-11-12 09:42:19,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2020-11-12 09:42:19,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1058. [2020-11-12 09:42:19,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 994 states have (on average 1.3933601609657948) internal successors, (1385), 1057 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1385 transitions. [2020-11-12 09:42:19,935 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1385 transitions. Word has length 106 [2020-11-12 09:42:19,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:19,935 INFO L481 AbstractCegarLoop]: Abstraction has 1058 states and 1385 transitions. [2020-11-12 09:42:19,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:19,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1385 transitions. [2020-11-12 09:42:19,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-12 09:42:19,936 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:19,936 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:20,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-11-12 09:42:20,140 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:20,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:20,141 INFO L82 PathProgramCache]: Analyzing trace with hash 636597438, now seen corresponding path program 63 times [2020-11-12 09:42:20,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:20,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720062598] [2020-11-12 09:42:20,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:20,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720062598] [2020-11-12 09:42:20,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295477905] [2020-11-12 09:42:20,581 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 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 [2020-11-12 09:42:20,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-12 09:42:20,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:20,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-12 09:42:20,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:20,705 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:20,760 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 4 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:20,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:20,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-12 09:42:20,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081631930] [2020-11-12 09:42:20,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:42:20,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:20,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:42:20,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:42:20,790 INFO L87 Difference]: Start difference. First operand 1058 states and 1385 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:21,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:21,743 INFO L93 Difference]: Finished difference Result 1666 states and 2057 transitions. [2020-11-12 09:42:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-12 09:42:21,744 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-12 09:42:21,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:21,745 INFO L225 Difference]: With dead ends: 1666 [2020-11-12 09:42:21,745 INFO L226 Difference]: Without dead ends: 1424 [2020-11-12 09:42:21,746 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2020-11-12 09:42:21,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2020-11-12 09:42:21,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1072. [2020-11-12 09:42:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1008 states have (on average 1.3918650793650793) internal successors, (1403), 1071 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:21,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1403 transitions. [2020-11-12 09:42:21,760 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1403 transitions. Word has length 106 [2020-11-12 09:42:21,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:21,760 INFO L481 AbstractCegarLoop]: Abstraction has 1072 states and 1403 transitions. [2020-11-12 09:42:21,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:21,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1403 transitions. [2020-11-12 09:42:21,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-12 09:42:21,762 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:21,762 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:21,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-11-12 09:42:21,963 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:21,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:21,963 INFO L82 PathProgramCache]: Analyzing trace with hash 796543870, now seen corresponding path program 64 times [2020-11-12 09:42:21,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:21,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680725272] [2020-11-12 09:42:21,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:22,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680725272] [2020-11-12 09:42:22,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758294239] [2020-11-12 09:42:22,380 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 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 [2020-11-12 09:42:22,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:42:22,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:22,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-12 09:42:22,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:22,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:22,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 4 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:22,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:22,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-12 09:42:22,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650549505] [2020-11-12 09:42:22,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:42:22,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:22,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:42:22,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:42:22,586 INFO L87 Difference]: Start difference. First operand 1072 states and 1403 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:23,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:23,638 INFO L93 Difference]: Finished difference Result 1658 states and 2049 transitions. [2020-11-12 09:42:23,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-12 09:42:23,638 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-12 09:42:23,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:23,639 INFO L225 Difference]: With dead ends: 1658 [2020-11-12 09:42:23,640 INFO L226 Difference]: Without dead ends: 1416 [2020-11-12 09:42:23,640 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2020-11-12 09:42:23,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2020-11-12 09:42:23,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1086. [2020-11-12 09:42:23,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1022 states have (on average 1.3904109589041096) internal successors, (1421), 1085 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:23,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1421 transitions. [2020-11-12 09:42:23,652 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1421 transitions. Word has length 106 [2020-11-12 09:42:23,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:23,652 INFO L481 AbstractCegarLoop]: Abstraction has 1086 states and 1421 transitions. [2020-11-12 09:42:23,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:23,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1421 transitions. [2020-11-12 09:42:23,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-12 09:42:23,653 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:23,654 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:23,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:42:23,854 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:23,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:23,855 INFO L82 PathProgramCache]: Analyzing trace with hash -271822274, now seen corresponding path program 65 times [2020-11-12 09:42:23,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:23,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59785616] [2020-11-12 09:42:23,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:24,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59785616] [2020-11-12 09:42:24,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307646934] [2020-11-12 09:42:24,255 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 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 [2020-11-12 09:42:24,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-12 09:42:24,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:24,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-12 09:42:24,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:24,382 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:24,432 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 4 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:24,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:24,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-12 09:42:24,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738331307] [2020-11-12 09:42:24,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:42:24,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:24,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:42:24,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:42:24,449 INFO L87 Difference]: Start difference. First operand 1086 states and 1421 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:25,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:25,670 INFO L93 Difference]: Finished difference Result 1650 states and 2041 transitions. [2020-11-12 09:42:25,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-12 09:42:25,671 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-12 09:42:25,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:25,673 INFO L225 Difference]: With dead ends: 1650 [2020-11-12 09:42:25,673 INFO L226 Difference]: Without dead ends: 1408 [2020-11-12 09:42:25,673 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=603, Invalid=1947, Unknown=0, NotChecked=0, Total=2550 [2020-11-12 09:42:25,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2020-11-12 09:42:25,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1100. [2020-11-12 09:42:25,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1036 states have (on average 1.388996138996139) internal successors, (1439), 1099 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:25,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1439 transitions. [2020-11-12 09:42:25,686 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1439 transitions. Word has length 106 [2020-11-12 09:42:25,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:25,687 INFO L481 AbstractCegarLoop]: Abstraction has 1100 states and 1439 transitions. [2020-11-12 09:42:25,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:25,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1439 transitions. [2020-11-12 09:42:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-12 09:42:25,688 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:25,688 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:25,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:42:25,889 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:25,890 INFO L82 PathProgramCache]: Analyzing trace with hash 519293182, now seen corresponding path program 66 times [2020-11-12 09:42:25,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:25,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303906877] [2020-11-12 09:42:25,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:26,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303906877] [2020-11-12 09:42:26,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475191793] [2020-11-12 09:42:26,278 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 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 [2020-11-12 09:42:26,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-12 09:42:26,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:26,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-12 09:42:26,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:26,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:26,449 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:26,463 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 4 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:26,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:26,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-12 09:42:26,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499062676] [2020-11-12 09:42:26,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:42:26,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:26,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:42:26,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:42:26,464 INFO L87 Difference]: Start difference. First operand 1100 states and 1439 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:27,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:27,764 INFO L93 Difference]: Finished difference Result 1642 states and 2033 transitions. [2020-11-12 09:42:27,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-12 09:42:27,765 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-12 09:42:27,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:27,766 INFO L225 Difference]: With dead ends: 1642 [2020-11-12 09:42:27,766 INFO L226 Difference]: Without dead ends: 1400 [2020-11-12 09:42:27,767 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2020-11-12 09:42:27,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2020-11-12 09:42:27,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1114. [2020-11-12 09:42:27,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1050 states have (on average 1.3876190476190475) internal successors, (1457), 1113 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:27,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1457 transitions. [2020-11-12 09:42:27,779 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1457 transitions. Word has length 106 [2020-11-12 09:42:27,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:27,779 INFO L481 AbstractCegarLoop]: Abstraction has 1114 states and 1457 transitions. [2020-11-12 09:42:27,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:27,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1457 transitions. [2020-11-12 09:42:27,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-12 09:42:27,781 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:27,781 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:27,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2020-11-12 09:42:27,982 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:27,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:27,983 INFO L82 PathProgramCache]: Analyzing trace with hash -738414658, now seen corresponding path program 67 times [2020-11-12 09:42:27,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:27,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881162319] [2020-11-12 09:42:27,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:28,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881162319] [2020-11-12 09:42:28,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539868208] [2020-11-12 09:42:28,405 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 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 [2020-11-12 09:42:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:28,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-12 09:42:28,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:28,548 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:28,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 4 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:28,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:28,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-12 09:42:28,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596132983] [2020-11-12 09:42:28,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:42:28,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:28,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:42:28,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:42:28,631 INFO L87 Difference]: Start difference. First operand 1114 states and 1457 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:30,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:30,064 INFO L93 Difference]: Finished difference Result 1634 states and 2025 transitions. [2020-11-12 09:42:30,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-12 09:42:30,065 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-12 09:42:30,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:30,066 INFO L225 Difference]: With dead ends: 1634 [2020-11-12 09:42:30,066 INFO L226 Difference]: Without dead ends: 1392 [2020-11-12 09:42:30,067 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2020-11-12 09:42:30,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2020-11-12 09:42:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1128. [2020-11-12 09:42:30,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1064 states have (on average 1.3862781954887218) internal successors, (1475), 1127 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1475 transitions. [2020-11-12 09:42:30,080 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1475 transitions. Word has length 106 [2020-11-12 09:42:30,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:30,081 INFO L481 AbstractCegarLoop]: Abstraction has 1128 states and 1475 transitions. [2020-11-12 09:42:30,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:30,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1475 transitions. [2020-11-12 09:42:30,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-12 09:42:30,082 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:30,082 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:30,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:42:30,283 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:30,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:30,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1112643970, now seen corresponding path program 68 times [2020-11-12 09:42:30,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:30,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755027493] [2020-11-12 09:42:30,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:30,634 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:30,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755027493] [2020-11-12 09:42:30,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714247877] [2020-11-12 09:42:30,635 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 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 [2020-11-12 09:42:30,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:42:30,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:30,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-12 09:42:30,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:30,779 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:30,831 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 4 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:30,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:30,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-12 09:42:30,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536549398] [2020-11-12 09:42:30,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:42:30,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:30,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:42:30,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:42:30,864 INFO L87 Difference]: Start difference. First operand 1128 states and 1475 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:32,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:32,415 INFO L93 Difference]: Finished difference Result 1639 states and 2039 transitions. [2020-11-12 09:42:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-12 09:42:32,416 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-12 09:42:32,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:32,417 INFO L225 Difference]: With dead ends: 1639 [2020-11-12 09:42:32,417 INFO L226 Difference]: Without dead ends: 1425 [2020-11-12 09:42:32,418 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=843, Invalid=2349, Unknown=0, NotChecked=0, Total=3192 [2020-11-12 09:42:32,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2020-11-12 09:42:32,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1142. [2020-11-12 09:42:32,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1078 states have (on average 1.3896103896103895) internal successors, (1498), 1141 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1498 transitions. [2020-11-12 09:42:32,434 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1498 transitions. Word has length 106 [2020-11-12 09:42:32,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:32,434 INFO L481 AbstractCegarLoop]: Abstraction has 1142 states and 1498 transitions. [2020-11-12 09:42:32,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:32,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1498 transitions. [2020-11-12 09:42:32,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-12 09:42:32,436 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:32,436 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:32,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-11-12 09:42:32,637 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:32,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:32,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1338491732, now seen corresponding path program 69 times [2020-11-12 09:42:32,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:32,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061593980] [2020-11-12 09:42:32,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:32,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061593980] [2020-11-12 09:42:32,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908376552] [2020-11-12 09:42:32,987 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 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 [2020-11-12 09:42:33,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-12 09:42:33,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:33,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-12 09:42:33,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:33,150 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:33,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:33,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-12 09:42:33,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575226200] [2020-11-12 09:42:33,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-12 09:42:33,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:33,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-12 09:42:33,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-11-12 09:42:33,168 INFO L87 Difference]: Start difference. First operand 1142 states and 1498 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:34,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:34,695 INFO L93 Difference]: Finished difference Result 1933 states and 2406 transitions. [2020-11-12 09:42:34,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-12 09:42:34,695 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-12 09:42:34,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:34,697 INFO L225 Difference]: With dead ends: 1933 [2020-11-12 09:42:34,697 INFO L226 Difference]: Without dead ends: 1397 [2020-11-12 09:42:34,698 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=783, Invalid=2297, Unknown=0, NotChecked=0, Total=3080 [2020-11-12 09:42:34,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2020-11-12 09:42:34,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1058. [2020-11-12 09:42:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 994 states have (on average 1.3933601609657948) internal successors, (1385), 1057 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1385 transitions. [2020-11-12 09:42:34,710 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1385 transitions. Word has length 106 [2020-11-12 09:42:34,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:34,711 INFO L481 AbstractCegarLoop]: Abstraction has 1058 states and 1385 transitions. [2020-11-12 09:42:34,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:34,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1385 transitions. [2020-11-12 09:42:34,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-12 09:42:34,712 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:34,712 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:34,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:42:34,913 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:34,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:34,914 INFO L82 PathProgramCache]: Analyzing trace with hash 272021267, now seen corresponding path program 70 times [2020-11-12 09:42:34,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:34,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980795954] [2020-11-12 09:42:34,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:35,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980795954] [2020-11-12 09:42:35,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311033421] [2020-11-12 09:42:35,387 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 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 [2020-11-12 09:42:35,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:42:35,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:35,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-12 09:42:35,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:35,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:35,532 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 4 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:35,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:35,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-12 09:42:35,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095908878] [2020-11-12 09:42:35,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:42:35,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:35,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:42:35,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:42:35,553 INFO L87 Difference]: Start difference. First operand 1058 states and 1385 transitions. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:36,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:36,500 INFO L93 Difference]: Finished difference Result 1696 states and 2093 transitions. [2020-11-12 09:42:36,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-12 09:42:36,501 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-12 09:42:36,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:36,503 INFO L225 Difference]: With dead ends: 1696 [2020-11-12 09:42:36,503 INFO L226 Difference]: Without dead ends: 1454 [2020-11-12 09:42:36,503 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=529, Invalid=1633, Unknown=0, NotChecked=0, Total=2162 [2020-11-12 09:42:36,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2020-11-12 09:42:36,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1072. [2020-11-12 09:42:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1008 states have (on average 1.3918650793650793) internal successors, (1403), 1071 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1403 transitions. [2020-11-12 09:42:36,517 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1403 transitions. Word has length 111 [2020-11-12 09:42:36,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:36,517 INFO L481 AbstractCegarLoop]: Abstraction has 1072 states and 1403 transitions. [2020-11-12 09:42:36,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:36,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1403 transitions. [2020-11-12 09:42:36,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-12 09:42:36,519 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:36,519 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:36,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-11-12 09:42:36,720 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:36,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:36,721 INFO L82 PathProgramCache]: Analyzing trace with hash 2080497107, now seen corresponding path program 71 times [2020-11-12 09:42:36,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:36,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081991901] [2020-11-12 09:42:36,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:37,192 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:37,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081991901] [2020-11-12 09:42:37,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242822813] [2020-11-12 09:42:37,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-12 09:42:37,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-12 09:42:37,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:37,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-12 09:42:37,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:37,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:37,342 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 4 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:37,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:37,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-12 09:42:37,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048950921] [2020-11-12 09:42:37,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:42:37,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:37,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:42:37,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:42:37,367 INFO L87 Difference]: Start difference. First operand 1072 states and 1403 transitions. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:38,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:38,468 INFO L93 Difference]: Finished difference Result 1697 states and 2095 transitions. [2020-11-12 09:42:38,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-12 09:42:38,468 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-12 09:42:38,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:38,471 INFO L225 Difference]: With dead ends: 1697 [2020-11-12 09:42:38,471 INFO L226 Difference]: Without dead ends: 1455 [2020-11-12 09:42:38,472 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=553, Invalid=1799, Unknown=0, NotChecked=0, Total=2352 [2020-11-12 09:42:38,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2020-11-12 09:42:38,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1086. [2020-11-12 09:42:38,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1022 states have (on average 1.3904109589041096) internal successors, (1421), 1085 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:38,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1421 transitions. [2020-11-12 09:42:38,490 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1421 transitions. Word has length 111 [2020-11-12 09:42:38,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:38,490 INFO L481 AbstractCegarLoop]: Abstraction has 1086 states and 1421 transitions. [2020-11-12 09:42:38,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:38,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1421 transitions. [2020-11-12 09:42:38,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-12 09:42:38,491 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:38,492 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:38,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:42:38,692 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:38,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:38,693 INFO L82 PathProgramCache]: Analyzing trace with hash -2054523757, now seen corresponding path program 72 times [2020-11-12 09:42:38,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:38,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205317450] [2020-11-12 09:42:38,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:39,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205317450] [2020-11-12 09:42:39,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751296374] [2020-11-12 09:42:39,152 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 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 [2020-11-12 09:42:39,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-12 09:42:39,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:39,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-12 09:42:39,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:39,306 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:39,329 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 4 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:39,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:39,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-12 09:42:39,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326402081] [2020-11-12 09:42:39,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:42:39,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:39,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:42:39,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:42:39,356 INFO L87 Difference]: Start difference. First operand 1086 states and 1421 transitions. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:40,532 INFO L93 Difference]: Finished difference Result 1698 states and 2097 transitions. [2020-11-12 09:42:40,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-12 09:42:40,532 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-12 09:42:40,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:40,534 INFO L225 Difference]: With dead ends: 1698 [2020-11-12 09:42:40,534 INFO L226 Difference]: Without dead ends: 1456 [2020-11-12 09:42:40,534 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=593, Invalid=1957, Unknown=0, NotChecked=0, Total=2550 [2020-11-12 09:42:40,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2020-11-12 09:42:40,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1100. [2020-11-12 09:42:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1036 states have (on average 1.388996138996139) internal successors, (1439), 1099 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:40,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1439 transitions. [2020-11-12 09:42:40,550 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1439 transitions. Word has length 111 [2020-11-12 09:42:40,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:40,550 INFO L481 AbstractCegarLoop]: Abstraction has 1100 states and 1439 transitions. [2020-11-12 09:42:40,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:40,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1439 transitions. [2020-11-12 09:42:40,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-12 09:42:40,551 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:40,552 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:40,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-11-12 09:42:40,752 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:40,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:40,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1172077395, now seen corresponding path program 73 times [2020-11-12 09:42:40,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:40,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542692553] [2020-11-12 09:42:40,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:41,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542692553] [2020-11-12 09:42:41,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599003626] [2020-11-12 09:42:41,170 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 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 [2020-11-12 09:42:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:41,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-12 09:42:41,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:41,310 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:41,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 4 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:41,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:41,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-12 09:42:41,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010472137] [2020-11-12 09:42:41,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:42:41,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:41,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:42:41,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:42:41,358 INFO L87 Difference]: Start difference. First operand 1100 states and 1439 transitions. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:42,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:42,569 INFO L93 Difference]: Finished difference Result 1699 states and 2099 transitions. [2020-11-12 09:42:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-12 09:42:42,570 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-12 09:42:42,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:42,571 INFO L225 Difference]: With dead ends: 1699 [2020-11-12 09:42:42,571 INFO L226 Difference]: Without dead ends: 1457 [2020-11-12 09:42:42,572 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=649, Invalid=2107, Unknown=0, NotChecked=0, Total=2756 [2020-11-12 09:42:42,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2020-11-12 09:42:42,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1114. [2020-11-12 09:42:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1050 states have (on average 1.3876190476190475) internal successors, (1457), 1113 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:42,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1457 transitions. [2020-11-12 09:42:42,584 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1457 transitions. Word has length 111 [2020-11-12 09:42:42,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:42,584 INFO L481 AbstractCegarLoop]: Abstraction has 1114 states and 1457 transitions. [2020-11-12 09:42:42,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:42,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1457 transitions. [2020-11-12 09:42:42,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-12 09:42:42,585 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:42,586 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:42,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:42:42,786 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:42,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:42,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1963192851, now seen corresponding path program 74 times [2020-11-12 09:42:42,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:42,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286128916] [2020-11-12 09:42:42,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:43,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286128916] [2020-11-12 09:42:43,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432817564] [2020-11-12 09:42:43,217 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 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 [2020-11-12 09:42:43,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:42:43,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:43,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-12 09:42:43,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:43,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:43,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 4 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:43,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:43,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-12 09:42:43,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440672231] [2020-11-12 09:42:43,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:42:43,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:43,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:42:43,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:42:43,429 INFO L87 Difference]: Start difference. First operand 1114 states and 1457 transitions. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:44,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:44,874 INFO L93 Difference]: Finished difference Result 1700 states and 2101 transitions. [2020-11-12 09:42:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-12 09:42:44,874 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-12 09:42:44,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:44,875 INFO L225 Difference]: With dead ends: 1700 [2020-11-12 09:42:44,875 INFO L226 Difference]: Without dead ends: 1458 [2020-11-12 09:42:44,876 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2020-11-12 09:42:44,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2020-11-12 09:42:44,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1128. [2020-11-12 09:42:44,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1064 states have (on average 1.3862781954887218) internal successors, (1475), 1127 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1475 transitions. [2020-11-12 09:42:44,889 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1475 transitions. Word has length 111 [2020-11-12 09:42:44,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:44,889 INFO L481 AbstractCegarLoop]: Abstraction has 1128 states and 1475 transitions. [2020-11-12 09:42:44,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:44,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1475 transitions. [2020-11-12 09:42:44,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-12 09:42:44,890 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:44,890 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:45,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:42:45,091 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:45,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:45,092 INFO L82 PathProgramCache]: Analyzing trace with hash 705485011, now seen corresponding path program 75 times [2020-11-12 09:42:45,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:45,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325532775] [2020-11-12 09:42:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:45,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325532775] [2020-11-12 09:42:45,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349592956] [2020-11-12 09:42:45,470 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 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 [2020-11-12 09:42:45,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-12 09:42:45,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:45,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-12 09:42:45,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:45,602 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:45,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 4 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:45,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:45,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-12 09:42:45,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575978683] [2020-11-12 09:42:45,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:42:45,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:45,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:42:45,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:42:45,642 INFO L87 Difference]: Start difference. First operand 1128 states and 1475 transitions. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:47,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:47,234 INFO L93 Difference]: Finished difference Result 1701 states and 2103 transitions. [2020-11-12 09:42:47,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-12 09:42:47,234 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-12 09:42:47,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:47,236 INFO L225 Difference]: With dead ends: 1701 [2020-11-12 09:42:47,236 INFO L226 Difference]: Without dead ends: 1459 [2020-11-12 09:42:47,237 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=809, Invalid=2383, Unknown=0, NotChecked=0, Total=3192 [2020-11-12 09:42:47,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2020-11-12 09:42:47,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1142. [2020-11-12 09:42:47,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1078 states have (on average 1.3849721706864564) internal successors, (1493), 1141 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:47,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1493 transitions. [2020-11-12 09:42:47,251 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1493 transitions. Word has length 111 [2020-11-12 09:42:47,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:47,251 INFO L481 AbstractCegarLoop]: Abstraction has 1142 states and 1493 transitions. [2020-11-12 09:42:47,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:47,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1493 transitions. [2020-11-12 09:42:47,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-12 09:42:47,252 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:47,253 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:47,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:42:47,462 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:47,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:47,462 INFO L82 PathProgramCache]: Analyzing trace with hash 331255699, now seen corresponding path program 76 times [2020-11-12 09:42:47,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:47,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521388145] [2020-11-12 09:42:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:47,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521388145] [2020-11-12 09:42:47,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682198505] [2020-11-12 09:42:47,853 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 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 [2020-11-12 09:42:47,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:42:47,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:47,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-12 09:42:47,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:47,985 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:48,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 4 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:48,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:48,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-12 09:42:48,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33600145] [2020-11-12 09:42:48,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:42:48,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:48,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:42:48,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:42:48,024 INFO L87 Difference]: Start difference. First operand 1142 states and 1493 transitions. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:49,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:49,620 INFO L93 Difference]: Finished difference Result 1705 states and 2115 transitions. [2020-11-12 09:42:49,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-12 09:42:49,621 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-12 09:42:49,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:49,622 INFO L225 Difference]: With dead ends: 1705 [2020-11-12 09:42:49,622 INFO L226 Difference]: Without dead ends: 1491 [2020-11-12 09:42:49,623 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=913, Invalid=2509, Unknown=0, NotChecked=0, Total=3422 [2020-11-12 09:42:49,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2020-11-12 09:42:49,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1156. [2020-11-12 09:42:49,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1092 states have (on average 1.3882783882783882) internal successors, (1516), 1155 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:49,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1516 transitions. [2020-11-12 09:42:49,637 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1516 transitions. Word has length 111 [2020-11-12 09:42:49,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:49,637 INFO L481 AbstractCegarLoop]: Abstraction has 1156 states and 1516 transitions. [2020-11-12 09:42:49,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 23 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:49,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1516 transitions. [2020-11-12 09:42:49,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-12 09:42:49,638 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:49,639 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:49,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:42:49,841 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:49,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:49,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1512575895, now seen corresponding path program 77 times [2020-11-12 09:42:49,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:49,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940178811] [2020-11-12 09:42:49,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:50,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940178811] [2020-11-12 09:42:50,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136198611] [2020-11-12 09:42:50,216 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 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 [2020-11-12 09:42:50,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-12 09:42:50,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:50,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-12 09:42:50,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:50,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:50,373 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:50,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:50,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-12 09:42:50,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860780493] [2020-11-12 09:42:50,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 09:42:50,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:50,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 09:42:50,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:42:50,387 INFO L87 Difference]: Start difference. First operand 1156 states and 1516 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:52,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:52,147 INFO L93 Difference]: Finished difference Result 2010 states and 2494 transitions. [2020-11-12 09:42:52,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-12 09:42:52,147 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-12 09:42:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:52,149 INFO L225 Difference]: With dead ends: 2010 [2020-11-12 09:42:52,149 INFO L226 Difference]: Without dead ends: 1474 [2020-11-12 09:42:52,150 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1036, Invalid=2624, Unknown=0, NotChecked=0, Total=3660 [2020-11-12 09:42:52,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2020-11-12 09:42:52,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1056. [2020-11-12 09:42:52,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 992 states have (on average 1.3931451612903225) internal successors, (1382), 1055 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:52,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1382 transitions. [2020-11-12 09:42:52,164 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1382 transitions. Word has length 111 [2020-11-12 09:42:52,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:52,165 INFO L481 AbstractCegarLoop]: Abstraction has 1056 states and 1382 transitions. [2020-11-12 09:42:52,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:52,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1382 transitions. [2020-11-12 09:42:52,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-12 09:42:52,166 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:52,167 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:52,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:42:52,368 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:52,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:52,369 INFO L82 PathProgramCache]: Analyzing trace with hash -710502551, now seen corresponding path program 78 times [2020-11-12 09:42:52,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:52,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32814114] [2020-11-12 09:42:52,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:52,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32814114] [2020-11-12 09:42:52,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577201373] [2020-11-12 09:42:52,902 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 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 [2020-11-12 09:42:52,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-12 09:42:53,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:53,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-12 09:42:53,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:53,062 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:53,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:53,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:53,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-12 09:42:53,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566415836] [2020-11-12 09:42:53,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-12 09:42:53,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:53,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-12 09:42:53,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2020-11-12 09:42:53,110 INFO L87 Difference]: Start difference. First operand 1056 states and 1382 transitions. Second operand has 26 states, 26 states have (on average 5.3076923076923075) internal successors, (138), 26 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:54,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:54,072 INFO L93 Difference]: Finished difference Result 1881 states and 2303 transitions. [2020-11-12 09:42:54,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-12 09:42:54,073 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.3076923076923075) internal successors, (138), 26 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-12 09:42:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:54,074 INFO L225 Difference]: With dead ends: 1881 [2020-11-12 09:42:54,075 INFO L226 Difference]: Without dead ends: 1639 [2020-11-12 09:42:54,076 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=639, Invalid=1713, Unknown=0, NotChecked=0, Total=2352 [2020-11-12 09:42:54,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2020-11-12 09:42:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1066. [2020-11-12 09:42:54,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1002 states have (on average 1.3912175648702594) internal successors, (1394), 1065 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:54,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1394 transitions. [2020-11-12 09:42:54,090 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1394 transitions. Word has length 116 [2020-11-12 09:42:54,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:54,090 INFO L481 AbstractCegarLoop]: Abstraction has 1066 states and 1394 transitions. [2020-11-12 09:42:54,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.3076923076923075) internal successors, (138), 26 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:54,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1394 transitions. [2020-11-12 09:42:54,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-12 09:42:54,092 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:54,092 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:54,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:42:54,293 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:54,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:54,294 INFO L82 PathProgramCache]: Analyzing trace with hash -2027081815, now seen corresponding path program 79 times [2020-11-12 09:42:54,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:54,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437465130] [2020-11-12 09:42:54,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:54,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437465130] [2020-11-12 09:42:54,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476493968] [2020-11-12 09:42:54,812 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 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 [2020-11-12 09:42:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:54,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-12 09:42:54,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:54,953 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:54,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 1 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:55,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:55,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-12 09:42:55,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977836948] [2020-11-12 09:42:55,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-12 09:42:55,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:55,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-12 09:42:55,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2020-11-12 09:42:55,021 INFO L87 Difference]: Start difference. First operand 1066 states and 1394 transitions. Second operand has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:56,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:56,008 INFO L93 Difference]: Finished difference Result 1738 states and 2141 transitions. [2020-11-12 09:42:56,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-12 09:42:56,009 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-12 09:42:56,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:56,012 INFO L225 Difference]: With dead ends: 1738 [2020-11-12 09:42:56,012 INFO L226 Difference]: Without dead ends: 1496 [2020-11-12 09:42:56,012 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=575, Invalid=1681, Unknown=0, NotChecked=0, Total=2256 [2020-11-12 09:42:56,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2020-11-12 09:42:56,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1089. [2020-11-12 09:42:56,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1025 states have (on average 1.3882926829268292) internal successors, (1423), 1088 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1423 transitions. [2020-11-12 09:42:56,026 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1423 transitions. Word has length 116 [2020-11-12 09:42:56,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:56,026 INFO L481 AbstractCegarLoop]: Abstraction has 1089 states and 1423 transitions. [2020-11-12 09:42:56,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:56,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1423 transitions. [2020-11-12 09:42:56,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-12 09:42:56,027 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:56,027 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:56,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:42:56,241 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:56,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:56,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1891178903, now seen corresponding path program 80 times [2020-11-12 09:42:56,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:56,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375915395] [2020-11-12 09:42:56,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:56,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375915395] [2020-11-12 09:42:56,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847261295] [2020-11-12 09:42:56,774 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 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 [2020-11-12 09:42:56,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:42:56,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:56,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-12 09:42:56,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:56,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:56,923 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 4 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:56,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:56,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-12 09:42:56,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629652192] [2020-11-12 09:42:56,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-12 09:42:56,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:56,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-12 09:42:56,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2020-11-12 09:42:56,945 INFO L87 Difference]: Start difference. First operand 1089 states and 1423 transitions. Second operand has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:58,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:42:58,102 INFO L93 Difference]: Finished difference Result 1739 states and 2143 transitions. [2020-11-12 09:42:58,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-12 09:42:58,103 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-12 09:42:58,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:42:58,105 INFO L225 Difference]: With dead ends: 1739 [2020-11-12 09:42:58,105 INFO L226 Difference]: Without dead ends: 1497 [2020-11-12 09:42:58,105 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=590, Invalid=1860, Unknown=0, NotChecked=0, Total=2450 [2020-11-12 09:42:58,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2020-11-12 09:42:58,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1103. [2020-11-12 09:42:58,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1039 states have (on average 1.3869104908565928) internal successors, (1441), 1102 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:58,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1441 transitions. [2020-11-12 09:42:58,120 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1441 transitions. Word has length 116 [2020-11-12 09:42:58,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:42:58,120 INFO L481 AbstractCegarLoop]: Abstraction has 1103 states and 1441 transitions. [2020-11-12 09:42:58,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:42:58,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1441 transitions. [2020-11-12 09:42:58,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-12 09:42:58,121 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:42:58,121 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:42:58,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-11-12 09:42:58,322 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:42:58,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:42:58,323 INFO L82 PathProgramCache]: Analyzing trace with hash -82703063, now seen corresponding path program 81 times [2020-11-12 09:42:58,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:42:58,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314820877] [2020-11-12 09:42:58,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:42:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:42:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:58,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314820877] [2020-11-12 09:42:58,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819153969] [2020-11-12 09:42:58,820 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 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 [2020-11-12 09:42:58,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-12 09:42:58,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:42:58,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-12 09:42:58,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:42:58,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:42:59,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:42:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 4 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:42:59,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:42:59,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-12 09:42:59,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666781982] [2020-11-12 09:42:59,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-12 09:42:59,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:42:59,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-12 09:42:59,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-11-12 09:42:59,038 INFO L87 Difference]: Start difference. First operand 1103 states and 1441 transitions. Second operand has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:00,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:43:00,332 INFO L93 Difference]: Finished difference Result 1731 states and 2135 transitions. [2020-11-12 09:43:00,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-12 09:43:00,332 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-12 09:43:00,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:43:00,334 INFO L225 Difference]: With dead ends: 1731 [2020-11-12 09:43:00,334 INFO L226 Difference]: Without dead ends: 1489 [2020-11-12 09:43:00,335 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=621, Invalid=2031, Unknown=0, NotChecked=0, Total=2652 [2020-11-12 09:43:00,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2020-11-12 09:43:00,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1117. [2020-11-12 09:43:00,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1053 states have (on average 1.3855650522317189) internal successors, (1459), 1116 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:00,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1459 transitions. [2020-11-12 09:43:00,350 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1459 transitions. Word has length 116 [2020-11-12 09:43:00,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:43:00,350 INFO L481 AbstractCegarLoop]: Abstraction has 1117 states and 1459 transitions. [2020-11-12 09:43:00,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:00,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1459 transitions. [2020-11-12 09:43:00,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-12 09:43:00,351 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:43:00,351 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:43:00,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:43:00,552 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:43:00,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:43:00,553 INFO L82 PathProgramCache]: Analyzing trace with hash 77243369, now seen corresponding path program 82 times [2020-11-12 09:43:00,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:43:00,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35730879] [2020-11-12 09:43:00,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:43:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:43:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:01,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35730879] [2020-11-12 09:43:01,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953411389] [2020-11-12 09:43:01,060 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 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 [2020-11-12 09:43:01,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:43:01,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:43:01,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-12 09:43:01,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:43:01,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:43:01,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:43:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 4 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:01,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:43:01,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-12 09:43:01,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670039197] [2020-11-12 09:43:01,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-12 09:43:01,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:43:01,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-12 09:43:01,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-11-12 09:43:01,257 INFO L87 Difference]: Start difference. First operand 1117 states and 1459 transitions. Second operand has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:02,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:43:02,650 INFO L93 Difference]: Finished difference Result 1723 states and 2127 transitions. [2020-11-12 09:43:02,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-12 09:43:02,651 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-12 09:43:02,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:43:02,653 INFO L225 Difference]: With dead ends: 1723 [2020-11-12 09:43:02,653 INFO L226 Difference]: Without dead ends: 1481 [2020-11-12 09:43:02,653 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2020-11-12 09:43:02,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2020-11-12 09:43:02,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1131. [2020-11-12 09:43:02,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1067 states have (on average 1.3842549203373946) internal successors, (1477), 1130 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1477 transitions. [2020-11-12 09:43:02,674 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1477 transitions. Word has length 116 [2020-11-12 09:43:02,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:43:02,675 INFO L481 AbstractCegarLoop]: Abstraction has 1131 states and 1477 transitions. [2020-11-12 09:43:02,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:02,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1477 transitions. [2020-11-12 09:43:02,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-12 09:43:02,677 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:43:02,677 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:43:02,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-11-12 09:43:02,891 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:43:02,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:43:02,891 INFO L82 PathProgramCache]: Analyzing trace with hash -991122775, now seen corresponding path program 83 times [2020-11-12 09:43:02,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:43:02,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957592412] [2020-11-12 09:43:02,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:43:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:43:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:03,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957592412] [2020-11-12 09:43:03,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695521251] [2020-11-12 09:43:03,346 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 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 [2020-11-12 09:43:03,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-12 09:43:03,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:43:03,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-12 09:43:03,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:43:03,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:43:03,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:43:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 4 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:03,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:43:03,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-12 09:43:03,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358992585] [2020-11-12 09:43:03,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-12 09:43:03,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:43:03,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-12 09:43:03,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-11-12 09:43:03,552 INFO L87 Difference]: Start difference. First operand 1131 states and 1477 transitions. Second operand has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:05,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:43:05,101 INFO L93 Difference]: Finished difference Result 1715 states and 2119 transitions. [2020-11-12 09:43:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-12 09:43:05,101 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-12 09:43:05,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:43:05,102 INFO L225 Difference]: With dead ends: 1715 [2020-11-12 09:43:05,103 INFO L226 Difference]: Without dead ends: 1473 [2020-11-12 09:43:05,103 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=731, Invalid=2349, Unknown=0, NotChecked=0, Total=3080 [2020-11-12 09:43:05,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2020-11-12 09:43:05,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1145. [2020-11-12 09:43:05,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1081 states have (on average 1.3829787234042554) internal successors, (1495), 1144 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:05,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1495 transitions. [2020-11-12 09:43:05,116 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1495 transitions. Word has length 116 [2020-11-12 09:43:05,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:43:05,116 INFO L481 AbstractCegarLoop]: Abstraction has 1145 states and 1495 transitions. [2020-11-12 09:43:05,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:05,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1495 transitions. [2020-11-12 09:43:05,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-12 09:43:05,117 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:43:05,117 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:43:05,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:43:05,318 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:43:05,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:43:05,319 INFO L82 PathProgramCache]: Analyzing trace with hash -200007319, now seen corresponding path program 84 times [2020-11-12 09:43:05,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:43:05,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273124219] [2020-11-12 09:43:05,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:43:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:43:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:05,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273124219] [2020-11-12 09:43:05,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165305608] [2020-11-12 09:43:05,761 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 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 [2020-11-12 09:43:05,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-12 09:43:05,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:43:05,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-12 09:43:05,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:43:05,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:43:05,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:43:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 4 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:05,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:43:05,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-12 09:43:05,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495691465] [2020-11-12 09:43:05,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-12 09:43:05,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:43:05,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-12 09:43:05,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2020-11-12 09:43:05,943 INFO L87 Difference]: Start difference. First operand 1145 states and 1495 transitions. Second operand has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:07,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:43:07,603 INFO L93 Difference]: Finished difference Result 1707 states and 2111 transitions. [2020-11-12 09:43:07,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-12 09:43:07,604 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-12 09:43:07,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:43:07,606 INFO L225 Difference]: With dead ends: 1707 [2020-11-12 09:43:07,606 INFO L226 Difference]: Without dead ends: 1465 [2020-11-12 09:43:07,607 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=810, Invalid=2496, Unknown=0, NotChecked=0, Total=3306 [2020-11-12 09:43:07,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2020-11-12 09:43:07,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1159. [2020-11-12 09:43:07,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1095 states have (on average 1.3817351598173515) internal successors, (1513), 1158 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:07,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1513 transitions. [2020-11-12 09:43:07,620 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1513 transitions. Word has length 116 [2020-11-12 09:43:07,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:43:07,621 INFO L481 AbstractCegarLoop]: Abstraction has 1159 states and 1513 transitions. [2020-11-12 09:43:07,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:07,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1513 transitions. [2020-11-12 09:43:07,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-12 09:43:07,622 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:43:07,622 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:43:07,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:43:07,824 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:43:07,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:43:07,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1457715159, now seen corresponding path program 85 times [2020-11-12 09:43:07,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:43:07,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150226968] [2020-11-12 09:43:07,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:43:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:43:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:08,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150226968] [2020-11-12 09:43:08,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021074277] [2020-11-12 09:43:08,247 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 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 [2020-11-12 09:43:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:43:08,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-12 09:43:08,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:43:08,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:43:08,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:43:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 4 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:08,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:43:08,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-12 09:43:08,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017837026] [2020-11-12 09:43:08,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-12 09:43:08,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:43:08,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-12 09:43:08,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-11-12 09:43:08,418 INFO L87 Difference]: Start difference. First operand 1159 states and 1513 transitions. Second operand has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:10,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:43:10,255 INFO L93 Difference]: Finished difference Result 1699 states and 2103 transitions. [2020-11-12 09:43:10,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-12 09:43:10,255 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-12 09:43:10,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:43:10,257 INFO L225 Difference]: With dead ends: 1699 [2020-11-12 09:43:10,257 INFO L226 Difference]: Without dead ends: 1457 [2020-11-12 09:43:10,257 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2020-11-12 09:43:10,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2020-11-12 09:43:10,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1173. [2020-11-12 09:43:10,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1109 states have (on average 1.3805229936880072) internal successors, (1531), 1172 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:10,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1531 transitions. [2020-11-12 09:43:10,275 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1531 transitions. Word has length 116 [2020-11-12 09:43:10,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:43:10,275 INFO L481 AbstractCegarLoop]: Abstraction has 1173 states and 1531 transitions. [2020-11-12 09:43:10,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:10,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1531 transitions. [2020-11-12 09:43:10,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-12 09:43:10,276 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:43:10,277 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:43:10,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:43:10,477 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:43:10,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:43:10,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1831944471, now seen corresponding path program 86 times [2020-11-12 09:43:10,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:43:10,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670761906] [2020-11-12 09:43:10,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:43:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:43:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:10,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670761906] [2020-11-12 09:43:10,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634749556] [2020-11-12 09:43:10,938 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 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 [2020-11-12 09:43:11,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:43:11,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:43:11,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-12 09:43:11,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:43:11,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:43:11,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:43:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 4 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:11,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:43:11,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-12 09:43:11,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260648749] [2020-11-12 09:43:11,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-12 09:43:11,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:43:11,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-12 09:43:11,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-11-12 09:43:11,117 INFO L87 Difference]: Start difference. First operand 1173 states and 1531 transitions. Second operand has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:13,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:43:13,126 INFO L93 Difference]: Finished difference Result 1704 states and 2117 transitions. [2020-11-12 09:43:13,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-12 09:43:13,126 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-12 09:43:13,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:43:13,128 INFO L225 Difference]: With dead ends: 1704 [2020-11-12 09:43:13,128 INFO L226 Difference]: Without dead ends: 1490 [2020-11-12 09:43:13,129 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1016, Invalid=2766, Unknown=0, NotChecked=0, Total=3782 [2020-11-12 09:43:13,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2020-11-12 09:43:13,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1187. [2020-11-12 09:43:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1123 states have (on average 1.383793410507569) internal successors, (1554), 1186 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:13,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1554 transitions. [2020-11-12 09:43:13,145 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1554 transitions. Word has length 116 [2020-11-12 09:43:13,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:43:13,145 INFO L481 AbstractCegarLoop]: Abstraction has 1187 states and 1554 transitions. [2020-11-12 09:43:13,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.125) internal successors, (123), 24 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:13,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1554 transitions. [2020-11-12 09:43:13,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-12 09:43:13,147 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:43:13,147 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:43:13,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:43:13,348 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:43:13,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:43:13,349 INFO L82 PathProgramCache]: Analyzing trace with hash 619191231, now seen corresponding path program 87 times [2020-11-12 09:43:13,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:43:13,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73207912] [2020-11-12 09:43:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:43:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:43:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:13,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73207912] [2020-11-12 09:43:13,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094883758] [2020-11-12 09:43:13,791 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 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 [2020-11-12 09:43:13,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-12 09:43:13,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:43:13,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-12 09:43:13,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:43:13,973 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:43:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:13,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:43:13,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-12 09:43:13,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933027435] [2020-11-12 09:43:13,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-12 09:43:13,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:43:13,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-12 09:43:13,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-11-12 09:43:13,988 INFO L87 Difference]: Start difference. First operand 1187 states and 1554 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:15,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:43:15,926 INFO L93 Difference]: Finished difference Result 1998 states and 2484 transitions. [2020-11-12 09:43:15,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-12 09:43:15,927 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2020-11-12 09:43:15,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:43:15,929 INFO L225 Difference]: With dead ends: 1998 [2020-11-12 09:43:15,929 INFO L226 Difference]: Without dead ends: 1462 [2020-11-12 09:43:15,930 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=963, Invalid=2819, Unknown=0, NotChecked=0, Total=3782 [2020-11-12 09:43:15,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2020-11-12 09:43:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1089. [2020-11-12 09:43:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1025 states have (on average 1.3882926829268292) internal successors, (1423), 1088 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:15,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1423 transitions. [2020-11-12 09:43:15,945 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1423 transitions. Word has length 116 [2020-11-12 09:43:15,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:43:15,946 INFO L481 AbstractCegarLoop]: Abstraction has 1089 states and 1423 transitions. [2020-11-12 09:43:15,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:15,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1423 transitions. [2020-11-12 09:43:15,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-12 09:43:15,947 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:43:15,947 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:43:16,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:43:16,148 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:43:16,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:43:16,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1621148286, now seen corresponding path program 88 times [2020-11-12 09:43:16,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:43:16,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648563900] [2020-11-12 09:43:16,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:43:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:43:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:16,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648563900] [2020-11-12 09:43:16,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665381615] [2020-11-12 09:43:16,741 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 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 [2020-11-12 09:43:16,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:43:16,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:43:16,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-12 09:43:16,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:43:16,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:43:16,950 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:43:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 4 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:16,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:43:16,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-12 09:43:16,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172099692] [2020-11-12 09:43:16,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-12 09:43:16,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:43:16,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-12 09:43:16,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2020-11-12 09:43:16,986 INFO L87 Difference]: Start difference. First operand 1089 states and 1423 transitions. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:18,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:43:18,076 INFO L93 Difference]: Finished difference Result 1769 states and 2179 transitions. [2020-11-12 09:43:18,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-12 09:43:18,076 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-12 09:43:18,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:43:18,078 INFO L225 Difference]: With dead ends: 1769 [2020-11-12 09:43:18,078 INFO L226 Difference]: Without dead ends: 1527 [2020-11-12 09:43:18,079 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=665, Invalid=1987, Unknown=0, NotChecked=0, Total=2652 [2020-11-12 09:43:18,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2020-11-12 09:43:18,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 1103. [2020-11-12 09:43:18,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1039 states have (on average 1.3869104908565928) internal successors, (1441), 1102 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:18,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1441 transitions. [2020-11-12 09:43:18,093 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1441 transitions. Word has length 121 [2020-11-12 09:43:18,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:43:18,093 INFO L481 AbstractCegarLoop]: Abstraction has 1103 states and 1441 transitions. [2020-11-12 09:43:18,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:18,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1441 transitions. [2020-11-12 09:43:18,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-12 09:43:18,094 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:43:18,095 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:43:18,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:43:18,296 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:43:18,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:43:18,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1757051198, now seen corresponding path program 89 times [2020-11-12 09:43:18,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:43:18,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402189180] [2020-11-12 09:43:18,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:43:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:43:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:18,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402189180] [2020-11-12 09:43:18,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417578741] [2020-11-12 09:43:18,873 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 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 [2020-11-12 09:43:18,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-12 09:43:18,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:43:18,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-12 09:43:18,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:43:19,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:43:19,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:43:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 4 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:19,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:43:19,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-12 09:43:19,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33065006] [2020-11-12 09:43:19,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-12 09:43:19,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:43:19,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-12 09:43:19,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-11-12 09:43:19,092 INFO L87 Difference]: Start difference. First operand 1103 states and 1441 transitions. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:20,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:43:20,354 INFO L93 Difference]: Finished difference Result 1770 states and 2181 transitions. [2020-11-12 09:43:20,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-12 09:43:20,354 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-12 09:43:20,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:43:20,356 INFO L225 Difference]: With dead ends: 1770 [2020-11-12 09:43:20,357 INFO L226 Difference]: Without dead ends: 1528 [2020-11-12 09:43:20,357 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=686, Invalid=2176, Unknown=0, NotChecked=0, Total=2862 [2020-11-12 09:43:20,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2020-11-12 09:43:20,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1117. [2020-11-12 09:43:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1053 states have (on average 1.3855650522317189) internal successors, (1459), 1116 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:20,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1459 transitions. [2020-11-12 09:43:20,371 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1459 transitions. Word has length 121 [2020-11-12 09:43:20,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:43:20,371 INFO L481 AbstractCegarLoop]: Abstraction has 1117 states and 1459 transitions. [2020-11-12 09:43:20,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:20,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1459 transitions. [2020-11-12 09:43:20,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-12 09:43:20,372 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:43:20,372 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:43:20,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2020-11-12 09:43:20,573 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:43:20,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:43:20,574 INFO L82 PathProgramCache]: Analyzing trace with hash -729440258, now seen corresponding path program 90 times [2020-11-12 09:43:20,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:43:20,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838312509] [2020-11-12 09:43:20,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:43:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:43:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:21,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838312509] [2020-11-12 09:43:21,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106467125] [2020-11-12 09:43:21,124 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 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 [2020-11-12 09:43:21,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-12 09:43:21,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:43:21,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-12 09:43:21,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:43:21,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:43:21,319 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:43:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 4 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:21,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:43:21,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-12 09:43:21,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726349194] [2020-11-12 09:43:21,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-12 09:43:21,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:43:21,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-12 09:43:21,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2020-11-12 09:43:21,341 INFO L87 Difference]: Start difference. First operand 1117 states and 1459 transitions. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:22,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:43:22,860 INFO L93 Difference]: Finished difference Result 1771 states and 2183 transitions. [2020-11-12 09:43:22,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-12 09:43:22,861 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-12 09:43:22,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:43:22,862 INFO L225 Difference]: With dead ends: 1771 [2020-11-12 09:43:22,862 INFO L226 Difference]: Without dead ends: 1529 [2020-11-12 09:43:22,863 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=723, Invalid=2357, Unknown=0, NotChecked=0, Total=3080 [2020-11-12 09:43:22,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2020-11-12 09:43:22,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1131. [2020-11-12 09:43:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1067 states have (on average 1.3842549203373946) internal successors, (1477), 1130 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1477 transitions. [2020-11-12 09:43:22,878 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1477 transitions. Word has length 121 [2020-11-12 09:43:22,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:43:22,879 INFO L481 AbstractCegarLoop]: Abstraction has 1131 states and 1477 transitions. [2020-11-12 09:43:22,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:22,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1477 transitions. [2020-11-12 09:43:22,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-12 09:43:22,880 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:43:22,880 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:43:23,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:43:23,081 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:43:23,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:43:23,082 INFO L82 PathProgramCache]: Analyzing trace with hash -569493826, now seen corresponding path program 91 times [2020-11-12 09:43:23,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:43:23,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315401908] [2020-11-12 09:43:23,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:43:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:43:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:23,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315401908] [2020-11-12 09:43:23,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652614979] [2020-11-12 09:43:23,626 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 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 [2020-11-12 09:43:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:43:23,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-12 09:43:23,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:43:23,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:43:23,825 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:43:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 4 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:23,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:43:23,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-12 09:43:23,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138053619] [2020-11-12 09:43:23,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-12 09:43:23,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:43:23,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-12 09:43:23,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2020-11-12 09:43:23,857 INFO L87 Difference]: Start difference. First operand 1131 states and 1477 transitions. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:25,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:43:25,442 INFO L93 Difference]: Finished difference Result 1772 states and 2185 transitions. [2020-11-12 09:43:25,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-12 09:43:25,442 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-12 09:43:25,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:43:25,444 INFO L225 Difference]: With dead ends: 1772 [2020-11-12 09:43:25,444 INFO L226 Difference]: Without dead ends: 1530 [2020-11-12 09:43:25,445 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=776, Invalid=2530, Unknown=0, NotChecked=0, Total=3306 [2020-11-12 09:43:25,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2020-11-12 09:43:25,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1145. [2020-11-12 09:43:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1081 states have (on average 1.3829787234042554) internal successors, (1495), 1144 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1495 transitions. [2020-11-12 09:43:25,461 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1495 transitions. Word has length 121 [2020-11-12 09:43:25,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:43:25,462 INFO L481 AbstractCegarLoop]: Abstraction has 1145 states and 1495 transitions. [2020-11-12 09:43:25,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:25,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1495 transitions. [2020-11-12 09:43:25,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-12 09:43:25,464 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:43:25,464 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:43:25,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-11-12 09:43:25,679 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:43:25,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:43:25,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1637859970, now seen corresponding path program 92 times [2020-11-12 09:43:25,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:43:25,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316559994] [2020-11-12 09:43:25,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:43:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:43:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:26,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316559994] [2020-11-12 09:43:26,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586003983] [2020-11-12 09:43:26,204 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 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 [2020-11-12 09:43:26,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:43:26,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:43:26,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-12 09:43:26,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:43:26,349 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:43:26,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:43:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 4 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:26,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:43:26,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-12 09:43:26,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719527837] [2020-11-12 09:43:26,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-12 09:43:26,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:43:26,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-12 09:43:26,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2020-11-12 09:43:26,435 INFO L87 Difference]: Start difference. First operand 1145 states and 1495 transitions. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:28,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:43:28,173 INFO L93 Difference]: Finished difference Result 1773 states and 2187 transitions. [2020-11-12 09:43:28,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-12 09:43:28,173 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-12 09:43:28,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:43:28,175 INFO L225 Difference]: With dead ends: 1773 [2020-11-12 09:43:28,176 INFO L226 Difference]: Without dead ends: 1531 [2020-11-12 09:43:28,176 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=845, Invalid=2695, Unknown=0, NotChecked=0, Total=3540 [2020-11-12 09:43:28,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2020-11-12 09:43:28,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1159. [2020-11-12 09:43:28,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1095 states have (on average 1.3817351598173515) internal successors, (1513), 1158 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:28,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1513 transitions. [2020-11-12 09:43:28,194 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1513 transitions. Word has length 121 [2020-11-12 09:43:28,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:43:28,195 INFO L481 AbstractCegarLoop]: Abstraction has 1159 states and 1513 transitions. [2020-11-12 09:43:28,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:28,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1513 transitions. [2020-11-12 09:43:28,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-12 09:43:28,196 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:43:28,196 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:43:28,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:43:28,410 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:43:28,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:43:28,410 INFO L82 PathProgramCache]: Analyzing trace with hash -846744514, now seen corresponding path program 93 times [2020-11-12 09:43:28,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:43:28,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718819817] [2020-11-12 09:43:28,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:43:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:43:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:28,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718819817] [2020-11-12 09:43:28,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909813778] [2020-11-12 09:43:28,894 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 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 [2020-11-12 09:43:28,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-12 09:43:28,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:43:28,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-12 09:43:28,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:43:29,040 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:43:29,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:43:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 4 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:29,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:43:29,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-12 09:43:29,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987640666] [2020-11-12 09:43:29,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-12 09:43:29,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:43:29,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-12 09:43:29,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2020-11-12 09:43:29,135 INFO L87 Difference]: Start difference. First operand 1159 states and 1513 transitions. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:31,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:43:31,033 INFO L93 Difference]: Finished difference Result 1774 states and 2189 transitions. [2020-11-12 09:43:31,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-12 09:43:31,033 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-12 09:43:31,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:43:31,035 INFO L225 Difference]: With dead ends: 1774 [2020-11-12 09:43:31,035 INFO L226 Difference]: Without dead ends: 1532 [2020-11-12 09:43:31,036 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=930, Invalid=2852, Unknown=0, NotChecked=0, Total=3782 [2020-11-12 09:43:31,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2020-11-12 09:43:31,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1173. [2020-11-12 09:43:31,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1109 states have (on average 1.3805229936880072) internal successors, (1531), 1172 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:31,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1531 transitions. [2020-11-12 09:43:31,055 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1531 transitions. Word has length 121 [2020-11-12 09:43:31,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:43:31,055 INFO L481 AbstractCegarLoop]: Abstraction has 1173 states and 1531 transitions. [2020-11-12 09:43:31,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:31,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1531 transitions. [2020-11-12 09:43:31,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-12 09:43:31,057 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:43:31,057 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:43:31,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-11-12 09:43:31,258 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:43:31,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:43:31,258 INFO L82 PathProgramCache]: Analyzing trace with hash -2104452354, now seen corresponding path program 94 times [2020-11-12 09:43:31,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:43:31,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232915931] [2020-11-12 09:43:31,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:43:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:43:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:31,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232915931] [2020-11-12 09:43:31,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029300818] [2020-11-12 09:43:31,761 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 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 [2020-11-12 09:43:31,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:43:31,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:43:31,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-12 09:43:31,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:43:31,895 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:43:31,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:43:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 4 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:31,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:43:31,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-12 09:43:31,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883041240] [2020-11-12 09:43:31,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-12 09:43:31,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:43:31,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-12 09:43:31,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2020-11-12 09:43:31,972 INFO L87 Difference]: Start difference. First operand 1173 states and 1531 transitions. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:33,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:43:33,978 INFO L93 Difference]: Finished difference Result 1775 states and 2191 transitions. [2020-11-12 09:43:33,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-12 09:43:33,979 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-12 09:43:33,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:43:33,980 INFO L225 Difference]: With dead ends: 1775 [2020-11-12 09:43:33,981 INFO L226 Difference]: Without dead ends: 1533 [2020-11-12 09:43:33,981 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1031, Invalid=3001, Unknown=0, NotChecked=0, Total=4032 [2020-11-12 09:43:33,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2020-11-12 09:43:33,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1187. [2020-11-12 09:43:33,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1123 states have (on average 1.379341050756901) internal successors, (1549), 1186 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:33,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1549 transitions. [2020-11-12 09:43:33,996 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1549 transitions. Word has length 121 [2020-11-12 09:43:33,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:43:33,996 INFO L481 AbstractCegarLoop]: Abstraction has 1187 states and 1549 transitions. [2020-11-12 09:43:33,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:33,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1549 transitions. [2020-11-12 09:43:33,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-12 09:43:33,997 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:43:33,997 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:43:34,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-11-12 09:43:34,199 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:43:34,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:43:34,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1816285630, now seen corresponding path program 95 times [2020-11-12 09:43:34,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:43:34,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184725038] [2020-11-12 09:43:34,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:43:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:43:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:34,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184725038] [2020-11-12 09:43:34,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409220732] [2020-11-12 09:43:34,672 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 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 [2020-11-12 09:43:34,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-12 09:43:34,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:43:34,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-12 09:43:34,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:43:34,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:43:34,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:43:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 4 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:34,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:43:34,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-12 09:43:34,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262165299] [2020-11-12 09:43:34,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-12 09:43:34,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:43:34,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-12 09:43:34,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-11-12 09:43:34,877 INFO L87 Difference]: Start difference. First operand 1187 states and 1549 transitions. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:36,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:43:36,980 INFO L93 Difference]: Finished difference Result 1779 states and 2203 transitions. [2020-11-12 09:43:36,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-12 09:43:36,980 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-12 09:43:36,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:43:36,982 INFO L225 Difference]: With dead ends: 1779 [2020-11-12 09:43:36,982 INFO L226 Difference]: Without dead ends: 1565 [2020-11-12 09:43:36,983 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1148, Invalid=3142, Unknown=0, NotChecked=0, Total=4290 [2020-11-12 09:43:36,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2020-11-12 09:43:36,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1201. [2020-11-12 09:43:36,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1137 states have (on average 1.3825857519788918) internal successors, (1572), 1200 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:36,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1572 transitions. [2020-11-12 09:43:36,997 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1572 transitions. Word has length 121 [2020-11-12 09:43:36,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:43:36,997 INFO L481 AbstractCegarLoop]: Abstraction has 1201 states and 1572 transitions. [2020-11-12 09:43:36,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:36,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1572 transitions. [2020-11-12 09:43:36,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-12 09:43:36,998 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:43:36,998 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:43:37,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-11-12 09:43:37,200 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:43:37,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:43:37,200 INFO L82 PathProgramCache]: Analyzing trace with hash -27545964, now seen corresponding path program 96 times [2020-11-12 09:43:37,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:43:37,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777036974] [2020-11-12 09:43:37,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:43:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:43:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:37,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777036974] [2020-11-12 09:43:37,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325474497] [2020-11-12 09:43:37,703 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 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 [2020-11-12 09:43:37,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-12 09:43:37,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:43:37,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-12 09:43:37,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:43:37,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:43:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:43:37,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:43:37,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-12 09:43:37,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319672792] [2020-11-12 09:43:37,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-12 09:43:37,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:43:37,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-12 09:43:37,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2020-11-12 09:43:37,928 INFO L87 Difference]: Start difference. First operand 1201 states and 1572 transitions. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:43:40,249 INFO L93 Difference]: Finished difference Result 2311 states and 2764 transitions. [2020-11-12 09:43:40,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-12 09:43:40,249 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2020-11-12 09:43:40,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:43:40,251 INFO L225 Difference]: With dead ends: 2311 [2020-11-12 09:43:40,251 INFO L226 Difference]: Without dead ends: 1577 [2020-11-12 09:43:40,252 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1215, Invalid=3755, Unknown=0, NotChecked=0, Total=4970 [2020-11-12 09:43:40,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2020-11-12 09:43:40,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1211. [2020-11-12 09:43:40,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1147 states have (on average 1.3818657367044465) internal successors, (1585), 1210 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:40,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1585 transitions. [2020-11-12 09:43:40,266 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1585 transitions. Word has length 121 [2020-11-12 09:43:40,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:43:40,266 INFO L481 AbstractCegarLoop]: Abstraction has 1211 states and 1585 transitions. [2020-11-12 09:43:40,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 09:43:40,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1585 transitions. [2020-11-12 09:43:40,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-12 09:43:40,267 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:43:40,268 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 09:43:40,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:43:40,470 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:43:40,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:43:40,471 INFO L82 PathProgramCache]: Analyzing trace with hash -2004045996, now seen corresponding path program 97 times [2020-11-12 09:43:40,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:43:40,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137652299] [2020-11-12 09:43:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:43:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-12 09:43:40,494 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-12 09:43:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-12 09:43:40,524 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-12 09:43:40,597 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-12 09:43:40,598 INFO L595 BasicCegarLoop]: Counterexample might be feasible [2020-11-12 09:43:40,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2020-11-12 09:43:40,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 09:43:40 BasicIcfg [2020-11-12 09:43:40,816 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-12 09:43:40,818 INFO L168 Benchmark]: Toolchain (without parser) took 175763.03 ms. Allocated memory was 302.0 MB in the beginning and 377.5 MB in the end (delta: 75.5 MB). Free memory was 276.2 MB in the beginning and 310.8 MB in the end (delta: -34.7 MB). Peak memory consumption was 42.8 MB. Max. memory is 16.0 GB. [2020-11-12 09:43:40,819 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 302.0 MB. Free memory was 272.5 MB in the beginning and 272.2 MB in the end (delta: 279.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2020-11-12 09:43:40,820 INFO L168 Benchmark]: CACSL2BoogieTranslator took 604.19 ms. Allocated memory is still 302.0 MB. Free memory was 275.6 MB in the beginning and 277.2 MB in the end (delta: -1.6 MB). Peak memory consumption was 29.3 MB. Max. memory is 16.0 GB. [2020-11-12 09:43:40,820 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.78 ms. Allocated memory is still 302.0 MB. Free memory was 277.2 MB in the beginning and 275.1 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2020-11-12 09:43:40,821 INFO L168 Benchmark]: Boogie Preprocessor took 29.43 ms. Allocated memory is still 302.0 MB. Free memory was 275.1 MB in the beginning and 274.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-12 09:43:40,821 INFO L168 Benchmark]: RCFGBuilder took 410.25 ms. Allocated memory is still 302.0 MB. Free memory was 274.1 MB in the beginning and 252.1 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2020-11-12 09:43:40,821 INFO L168 Benchmark]: TraceAbstraction took 174661.03 ms. Allocated memory was 302.0 MB in the beginning and 377.5 MB in the end (delta: 75.5 MB). Free memory was 252.1 MB in the beginning and 310.8 MB in the end (delta: -58.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.0 GB. [2020-11-12 09:43:40,825 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 302.0 MB. Free memory was 272.5 MB in the beginning and 272.2 MB in the end (delta: 279.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 604.19 ms. Allocated memory is still 302.0 MB. Free memory was 275.6 MB in the beginning and 277.2 MB in the end (delta: -1.6 MB). Peak memory consumption was 29.3 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 44.78 ms. Allocated memory is still 302.0 MB. Free memory was 277.2 MB in the beginning and 275.1 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 29.43 ms. Allocated memory is still 302.0 MB. Free memory was 275.1 MB in the beginning and 274.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 410.25 ms. Allocated memory is still 302.0 MB. Free memory was 274.1 MB in the beginning and 252.1 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 174661.03 ms. Allocated memory was 302.0 MB in the beginning and 377.5 MB in the end (delta: 75.5 MB). Free memory was 252.1 MB in the beginning and 310.8 MB in the end (delta: -58.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 685]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L686] 0 int i = 3, j = 6; VAL [i=3, j=6] [L704] 0 pthread_t id1, id2; VAL [i=3, j=6] [L705] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L688] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L688] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L706] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L708] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L688] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=0] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=0, k=2] [L688] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=0, k=2] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L696] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=1] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=1] [L688] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=1] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L696] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=2] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=2, k=4] [L688] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=2, k=4] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L696] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=3] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=3, k=5] [L688] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=3, k=5] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L696] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=4] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=4] [L688] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=4] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L696] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=5] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=5] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=5] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, k=5] [L688] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=5, k=7] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, k=6] [L696] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, k=6] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=6, k=7] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=6] [L688] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=6] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L696] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=8] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=7] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=7, k=9] [L688] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=7, k=9] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L696] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=8] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L696] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L711] 0 int condJ = j >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L713] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L685] COND FALSE 0 !(0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L685] 0 __assert_fail ("0", "triangular-longer-2.c", 8, __extension__ __PRETTY_FUNCTION__) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 174.3s, OverallIterations: 105, TraceHistogramMax: 10, AutomataDifference: 98.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.4s, HoareTripleCheckerStatistics: 7236 SDtfs, 41439 SDslu, 67545 SDs, 0 SdLazy, 14570 SolverSat, 9538 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13068 GetRequests, 8784 SyntacticMatches, 80 SemanticMatches, 4204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44205 ImplicationChecksByTransitivity, 103.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6412occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.0s AutomataMinimizationTime, 104 MinimizatonAttempts, 31174 StatesRemovedByMinimization, 104 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.5s SsaConstructionTime, 4.4s SatisfiabilityAnalysisTime, 39.9s InterpolantComputationTime, 18162 NumberOfCodeBlocks, 18162 NumberOfCodeBlocksAsserted, 504 NumberOfCheckSat, 17834 ConstructedInterpolants, 0 QuantifiedInterpolants, 7152258 SizeOfPredicates, 1590 NumberOfNonLiveVariables, 18816 ConjunctsInSsa, 1916 ConjunctsInUnsatCore, 202 InterpolantComputations, 6 PerfectInterpolantSequences, 265/33592 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...