/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 19:38:03,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 19:38:03,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 19:38:03,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 19:38:03,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 19:38:03,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 19:38:03,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 19:38:03,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 19:38:03,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 19:38:03,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 19:38:03,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 19:38:03,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 19:38:03,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 19:38:03,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 19:38:03,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 19:38:03,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 19:38:03,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 19:38:03,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 19:38:03,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 19:38:03,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 19:38:03,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 19:38:03,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 19:38:03,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 19:38:03,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 19:38:03,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-15 19:38:03,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 19:38:03,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 19:38:03,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 19:38:03,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 19:38:03,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 19:38:03,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 19:38:03,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 19:38:03,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 19:38:03,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 19:38:03,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 19:38:03,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 19:38:03,481 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-15 19:38:03,503 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 19:38:03,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 19:38:03,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 19:38:03,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 19:38:03,505 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 19:38:03,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 19:38:03,506 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 19:38:03,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 19:38:03,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 19:38:03,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 19:38:03,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 19:38:03,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 19:38:03,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 19:38:03,507 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 19:38:03,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 19:38:03,507 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 19:38:03,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 19:38:03,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 19:38:03,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 19:38:03,508 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 19:38:03,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 19:38:03,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 19:38:03,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 19:38:03,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 19:38:03,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 19:38:03,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 19:38:03,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 19:38:03,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 19:38:03,510 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 19:38:03,510 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 19:38:03,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 19:38:03,831 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 19:38:03,836 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 19:38:03,837 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 19:38:03,840 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 19:38:03,841 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-10-15 19:38:03,907 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81a7b7083/297e328358144b05b2774c3e73f91438/FLAG11021ad03 [2020-10-15 19:38:04,294 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 19:38:04,295 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-10-15 19:38:04,295 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-15 19:38:04,296 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-15 19:38:04,296 WARN L117 ultiparseSymbolTable]: System include stdbool.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-15 19:38:04,333 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81a7b7083/297e328358144b05b2774c3e73f91438/FLAG11021ad03 [2020-10-15 19:38:04,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81a7b7083/297e328358144b05b2774c3e73f91438 [2020-10-15 19:38:04,730 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 19:38:04,732 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 19:38:04,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 19:38:04,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 19:38:04,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 19:38:04,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:38:04" (1/1) ... [2020-10-15 19:38:04,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25368ffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:04, skipping insertion in model container [2020-10-15 19:38:04,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:38:04" (1/1) ... [2020-10-15 19:38:04,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 19:38:04,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 19:38:04,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 19:38:04,995 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 19:38:05,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 19:38:05,142 INFO L208 MainTranslator]: Completed translation [2020-10-15 19:38:05,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:05 WrapperNode [2020-10-15 19:38:05,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 19:38:05,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 19:38:05,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 19:38:05,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 19:38:05,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:05" (1/1) ... [2020-10-15 19:38:05,166 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:05" (1/1) ... [2020-10-15 19:38:05,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 19:38:05,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 19:38:05,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 19:38:05,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 19:38:05,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:05" (1/1) ... [2020-10-15 19:38:05,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:05" (1/1) ... [2020-10-15 19:38:05,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:05" (1/1) ... [2020-10-15 19:38:05,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:05" (1/1) ... [2020-10-15 19:38:05,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:05" (1/1) ... [2020-10-15 19:38:05,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:05" (1/1) ... [2020-10-15 19:38:05,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:05" (1/1) ... [2020-10-15 19:38:05,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 19:38:05,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 19:38:05,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 19:38:05,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 19:38:05,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 19:38:05,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 19:38:05,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 19:38:05,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 19:38:05,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-15 19:38:05,323 INFO L130 BoogieDeclarations]: Found specification of procedure secondIncrement [2020-10-15 19:38:05,323 INFO L138 BoogieDeclarations]: Found implementation of procedure secondIncrement [2020-10-15 19:38:05,324 INFO L130 BoogieDeclarations]: Found specification of procedure firstIncrement [2020-10-15 19:38:05,324 INFO L138 BoogieDeclarations]: Found implementation of procedure firstIncrement [2020-10-15 19:38:05,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 19:38:05,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 19:38:05,327 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 19:38:05,558 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 19:38:05,559 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 19:38:05,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:38:05 BoogieIcfgContainer [2020-10-15 19:38:05,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 19:38:05,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 19:38:05,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 19:38:05,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 19:38:05,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:38:04" (1/3) ... [2020-10-15 19:38:05,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699dc141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:38:05, skipping insertion in model container [2020-10-15 19:38:05,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:05" (2/3) ... [2020-10-15 19:38:05,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699dc141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:38:05, skipping insertion in model container [2020-10-15 19:38:05,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:38:05" (3/3) ... [2020-10-15 19:38:05,583 INFO L111 eAbstractionObserver]: Analyzing ICFG NonAtomicIncrement_2Threads.c [2020-10-15 19:38:05,620 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 19:38:05,620 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 19:38:05,641 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 19:38:05,642 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 19:38:05,694 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,694 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,694 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,695 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,695 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,695 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,696 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,696 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,696 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,696 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,697 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,697 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,698 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,698 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,698 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,698 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,699 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,699 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,699 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,699 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,699 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,700 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,703 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,703 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,704 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,704 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,704 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,708 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,709 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,709 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,709 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,709 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:38:05,729 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 19:38:05,746 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 19:38:05,746 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 19:38:05,746 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 19:38:05,746 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 19:38:05,746 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 19:38:05,746 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 19:38:05,747 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 19:38:05,747 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 19:38:05,760 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 19:38:05,763 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 56 transitions, 134 flow [2020-10-15 19:38:05,766 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 56 transitions, 134 flow [2020-10-15 19:38:05,768 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 56 transitions, 134 flow [2020-10-15 19:38:05,810 INFO L129 PetriNetUnfolder]: 5/56 cut-off events. [2020-10-15 19:38:05,810 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-15 19:38:05,819 INFO L80 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 56 events. 5/56 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2020-10-15 19:38:05,821 INFO L117 LiptonReduction]: Number of co-enabled transitions 528 [2020-10-15 19:38:06,557 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-10-15 19:38:06,618 INFO L132 LiptonReduction]: Checked pairs total: 866 [2020-10-15 19:38:06,619 INFO L134 LiptonReduction]: Total number of compositions: 34 [2020-10-15 19:38:06,626 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 24 transitions, 70 flow [2020-10-15 19:38:06,640 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 70 states. [2020-10-15 19:38:06,643 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2020-10-15 19:38:06,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 19:38:06,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:06,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:06,653 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:06,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:06,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1474833226, now seen corresponding path program 1 times [2020-10-15 19:38:06,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:06,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431752962] [2020-10-15 19:38:06,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:06,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431752962] [2020-10-15 19:38:06,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:38:06,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 19:38:06,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044734531] [2020-10-15 19:38:06,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 19:38:06,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:06,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 19:38:06,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 19:38:06,864 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 3 states. [2020-10-15 19:38:06,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:06,898 INFO L93 Difference]: Finished difference Result 96 states and 211 transitions. [2020-10-15 19:38:06,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 19:38:06,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-15 19:38:06,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:06,913 INFO L225 Difference]: With dead ends: 96 [2020-10-15 19:38:06,914 INFO L226 Difference]: Without dead ends: 95 [2020-10-15 19:38:06,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 19:38:06,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-15 19:38:06,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2020-10-15 19:38:06,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 19:38:06,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 180 transitions. [2020-10-15 19:38:06,962 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 180 transitions. Word has length 15 [2020-10-15 19:38:06,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:06,962 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 180 transitions. [2020-10-15 19:38:06,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 19:38:06,963 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 180 transitions. [2020-10-15 19:38:06,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-15 19:38:06,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:06,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:06,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 19:38:06,965 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:06,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:06,965 INFO L82 PathProgramCache]: Analyzing trace with hash -657301668, now seen corresponding path program 1 times [2020-10-15 19:38:06,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:06,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771516807] [2020-10-15 19:38:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:07,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771516807] [2020-10-15 19:38:07,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453815235] [2020-10-15 19:38:07,016 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 [2020-10-15 19:38:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:07,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-15 19:38:07,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:07,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 19:38:07,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 19:38:07,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-15 19:38:07,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499786638] [2020-10-15 19:38:07,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 19:38:07,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:07,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 19:38:07,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:38:07,103 INFO L87 Difference]: Start difference. First operand 82 states and 180 transitions. Second operand 3 states. [2020-10-15 19:38:07,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:07,122 INFO L93 Difference]: Finished difference Result 108 states and 242 transitions. [2020-10-15 19:38:07,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 19:38:07,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-15 19:38:07,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:07,125 INFO L225 Difference]: With dead ends: 108 [2020-10-15 19:38:07,126 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 19:38:07,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:38:07,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 19:38:07,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2020-10-15 19:38:07,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 19:38:07,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 211 transitions. [2020-10-15 19:38:07,139 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 211 transitions. Word has length 17 [2020-10-15 19:38:07,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:07,140 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 211 transitions. [2020-10-15 19:38:07,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 19:38:07,140 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 211 transitions. [2020-10-15 19:38:07,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 19:38:07,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:07,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:07,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-15 19:38:07,358 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:07,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:07,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1653958726, now seen corresponding path program 1 times [2020-10-15 19:38:07,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:07,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599251059] [2020-10-15 19:38:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:07,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599251059] [2020-10-15 19:38:07,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628418634] [2020-10-15 19:38:07,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:07,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:07,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-15 19:38:07,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 19:38:07,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:07,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-15 19:38:07,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808395870] [2020-10-15 19:38:07,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:38:07,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:07,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:38:07,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:38:07,487 INFO L87 Difference]: Start difference. First operand 95 states and 211 transitions. Second operand 6 states. [2020-10-15 19:38:07,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:07,592 INFO L93 Difference]: Finished difference Result 197 states and 454 transitions. [2020-10-15 19:38:07,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:38:07,593 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-15 19:38:07,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:07,596 INFO L225 Difference]: With dead ends: 197 [2020-10-15 19:38:07,596 INFO L226 Difference]: Without dead ends: 197 [2020-10-15 19:38:07,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-15 19:38:07,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-15 19:38:07,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 159. [2020-10-15 19:38:07,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 19:38:07,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 363 transitions. [2020-10-15 19:38:07,613 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 363 transitions. Word has length 19 [2020-10-15 19:38:07,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:07,613 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 363 transitions. [2020-10-15 19:38:07,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:38:07,614 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 363 transitions. [2020-10-15 19:38:07,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 19:38:07,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:07,616 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:07,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:07,830 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:07,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:07,830 INFO L82 PathProgramCache]: Analyzing trace with hash 2009767926, now seen corresponding path program 2 times [2020-10-15 19:38:07,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:07,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899631775] [2020-10-15 19:38:07,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 19:38:07,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899631775] [2020-10-15 19:38:07,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102270977] [2020-10-15 19:38:07,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:07,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:38:07,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:38:07,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-15 19:38:07,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 19:38:07,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:07,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 19:38:07,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589835767] [2020-10-15 19:38:07,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:38:07,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:07,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:38:07,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:38:07,958 INFO L87 Difference]: Start difference. First operand 159 states and 363 transitions. Second operand 6 states. [2020-10-15 19:38:07,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:07,982 INFO L93 Difference]: Finished difference Result 210 states and 486 transitions. [2020-10-15 19:38:07,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 19:38:07,983 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-15 19:38:07,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:07,985 INFO L225 Difference]: With dead ends: 210 [2020-10-15 19:38:07,985 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 19:38:07,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:38:07,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 19:38:07,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 193. [2020-10-15 19:38:07,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-15 19:38:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 445 transitions. [2020-10-15 19:38:08,000 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 445 transitions. Word has length 23 [2020-10-15 19:38:08,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:08,001 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 445 transitions. [2020-10-15 19:38:08,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:38:08,001 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 445 transitions. [2020-10-15 19:38:08,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 19:38:08,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:08,003 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:08,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:08,217 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:08,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:08,218 INFO L82 PathProgramCache]: Analyzing trace with hash -275132064, now seen corresponding path program 3 times [2020-10-15 19:38:08,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:08,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691146947] [2020-10-15 19:38:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 19:38:08,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691146947] [2020-10-15 19:38:08,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436290279] [2020-10-15 19:38:08,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:08,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 19:38:08,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:38:08,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-15 19:38:08,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 19:38:08,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:08,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 19:38:08,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33832754] [2020-10-15 19:38:08,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 19:38:08,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:08,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 19:38:08,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-15 19:38:08,380 INFO L87 Difference]: Start difference. First operand 193 states and 445 transitions. Second operand 7 states. [2020-10-15 19:38:08,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:08,407 INFO L93 Difference]: Finished difference Result 244 states and 568 transitions. [2020-10-15 19:38:08,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 19:38:08,407 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-15 19:38:08,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:08,409 INFO L225 Difference]: With dead ends: 244 [2020-10-15 19:38:08,410 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 19:38:08,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-15 19:38:08,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 19:38:08,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 227. [2020-10-15 19:38:08,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-15 19:38:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 527 transitions. [2020-10-15 19:38:08,425 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 527 transitions. Word has length 25 [2020-10-15 19:38:08,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:08,425 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 527 transitions. [2020-10-15 19:38:08,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 19:38:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 527 transitions. [2020-10-15 19:38:08,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 19:38:08,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:08,427 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:08,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:08,642 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:08,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:08,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1335734198, now seen corresponding path program 4 times [2020-10-15 19:38:08,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:08,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369990347] [2020-10-15 19:38:08,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 19:38:08,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369990347] [2020-10-15 19:38:08,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046721925] [2020-10-15 19:38:08,703 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:08,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:38:08,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:38:08,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-15 19:38:08,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 19:38:08,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:08,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 19:38:08,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326939790] [2020-10-15 19:38:08,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 19:38:08,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:08,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 19:38:08,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-15 19:38:08,788 INFO L87 Difference]: Start difference. First operand 227 states and 527 transitions. Second operand 8 states. [2020-10-15 19:38:08,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:08,814 INFO L93 Difference]: Finished difference Result 261 states and 609 transitions. [2020-10-15 19:38:08,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:38:08,815 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-15 19:38:08,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:08,817 INFO L225 Difference]: With dead ends: 261 [2020-10-15 19:38:08,817 INFO L226 Difference]: Without dead ends: 261 [2020-10-15 19:38:08,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-15 19:38:08,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-15 19:38:08,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2020-10-15 19:38:08,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-15 19:38:08,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 609 transitions. [2020-10-15 19:38:08,829 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 609 transitions. Word has length 27 [2020-10-15 19:38:08,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:08,829 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 609 transitions. [2020-10-15 19:38:08,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 19:38:08,829 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 609 transitions. [2020-10-15 19:38:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 19:38:08,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:08,831 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:09,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-15 19:38:09,046 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:09,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:09,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1627831476, now seen corresponding path program 5 times [2020-10-15 19:38:09,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:09,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088377319] [2020-10-15 19:38:09,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-15 19:38:09,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088377319] [2020-10-15 19:38:09,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196358865] [2020-10-15 19:38:09,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:09,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-15 19:38:09,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:38:09,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-15 19:38:09,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-15 19:38:09,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:09,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 19:38:09,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503001572] [2020-10-15 19:38:09,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:38:09,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:09,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:38:09,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:38:09,192 INFO L87 Difference]: Start difference. First operand 261 states and 609 transitions. Second operand 6 states. [2020-10-15 19:38:09,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:09,216 INFO L93 Difference]: Finished difference Result 354 states and 834 transitions. [2020-10-15 19:38:09,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 19:38:09,217 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-15 19:38:09,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:09,219 INFO L225 Difference]: With dead ends: 354 [2020-10-15 19:38:09,220 INFO L226 Difference]: Without dead ends: 354 [2020-10-15 19:38:09,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:38:09,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-15 19:38:09,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 323. [2020-10-15 19:38:09,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-15 19:38:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 759 transitions. [2020-10-15 19:38:09,245 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 759 transitions. Word has length 29 [2020-10-15 19:38:09,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:09,247 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 759 transitions. [2020-10-15 19:38:09,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:38:09,247 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 759 transitions. [2020-10-15 19:38:09,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 19:38:09,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:09,254 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:09,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:09,468 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:09,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:09,469 INFO L82 PathProgramCache]: Analyzing trace with hash 827854074, now seen corresponding path program 6 times [2020-10-15 19:38:09,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:09,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142010459] [2020-10-15 19:38:09,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-15 19:38:09,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142010459] [2020-10-15 19:38:09,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832406720] [2020-10-15 19:38:09,532 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:09,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-15 19:38:09,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:38:09,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-15 19:38:09,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-15 19:38:09,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:09,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-15 19:38:09,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924597663] [2020-10-15 19:38:09,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 19:38:09,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:09,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 19:38:09,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-15 19:38:09,605 INFO L87 Difference]: Start difference. First operand 323 states and 759 transitions. Second operand 7 states. [2020-10-15 19:38:09,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:09,626 INFO L93 Difference]: Finished difference Result 416 states and 984 transitions. [2020-10-15 19:38:09,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 19:38:09,626 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-15 19:38:09,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:09,629 INFO L225 Difference]: With dead ends: 416 [2020-10-15 19:38:09,629 INFO L226 Difference]: Without dead ends: 416 [2020-10-15 19:38:09,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-15 19:38:09,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-10-15 19:38:09,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 385. [2020-10-15 19:38:09,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-15 19:38:09,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 909 transitions. [2020-10-15 19:38:09,640 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 909 transitions. Word has length 31 [2020-10-15 19:38:09,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:09,641 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 909 transitions. [2020-10-15 19:38:09,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 19:38:09,641 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 909 transitions. [2020-10-15 19:38:09,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-15 19:38:09,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:09,643 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:09,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:09,856 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:09,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:09,857 INFO L82 PathProgramCache]: Analyzing trace with hash 848716736, now seen corresponding path program 7 times [2020-10-15 19:38:09,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:09,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571264611] [2020-10-15 19:38:09,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-15 19:38:09,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571264611] [2020-10-15 19:38:09,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538507726] [2020-10-15 19:38:09,922 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:09,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-15 19:38:09,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-15 19:38:10,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:10,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 19:38:10,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114415700] [2020-10-15 19:38:10,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 19:38:10,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:10,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 19:38:10,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-15 19:38:10,013 INFO L87 Difference]: Start difference. First operand 385 states and 909 transitions. Second operand 8 states. [2020-10-15 19:38:10,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:10,046 INFO L93 Difference]: Finished difference Result 447 states and 1059 transitions. [2020-10-15 19:38:10,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:38:10,046 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-15 19:38:10,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:10,049 INFO L225 Difference]: With dead ends: 447 [2020-10-15 19:38:10,049 INFO L226 Difference]: Without dead ends: 447 [2020-10-15 19:38:10,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-15 19:38:10,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-15 19:38:10,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2020-10-15 19:38:10,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-10-15 19:38:10,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1059 transitions. [2020-10-15 19:38:10,061 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1059 transitions. Word has length 33 [2020-10-15 19:38:10,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:10,062 INFO L481 AbstractCegarLoop]: Abstraction has 447 states and 1059 transitions. [2020-10-15 19:38:10,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 19:38:10,062 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1059 transitions. [2020-10-15 19:38:10,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 19:38:10,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:10,064 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:10,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-15 19:38:10,278 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:10,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:10,278 INFO L82 PathProgramCache]: Analyzing trace with hash -577101562, now seen corresponding path program 8 times [2020-10-15 19:38:10,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:10,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416543445] [2020-10-15 19:38:10,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 41 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:10,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416543445] [2020-10-15 19:38:10,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638930707] [2020-10-15 19:38:10,594 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:10,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:38:10,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:38:10,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-15 19:38:10,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:10,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 19:38:10,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [21] total 23 [2020-10-15 19:38:10,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711589536] [2020-10-15 19:38:10,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 19:38:10,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:10,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 19:38:10,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:38:10,702 INFO L87 Difference]: Start difference. First operand 447 states and 1059 transitions. Second operand 23 states. [2020-10-15 19:38:11,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:11,479 INFO L93 Difference]: Finished difference Result 1728 states and 4029 transitions. [2020-10-15 19:38:11,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 19:38:11,485 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-15 19:38:11,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:11,494 INFO L225 Difference]: With dead ends: 1728 [2020-10-15 19:38:11,494 INFO L226 Difference]: Without dead ends: 876 [2020-10-15 19:38:11,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=720, Invalid=1632, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 19:38:11,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2020-10-15 19:38:11,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 585. [2020-10-15 19:38:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-10-15 19:38:11,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1403 transitions. [2020-10-15 19:38:11,514 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1403 transitions. Word has length 35 [2020-10-15 19:38:11,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:11,514 INFO L481 AbstractCegarLoop]: Abstraction has 585 states and 1403 transitions. [2020-10-15 19:38:11,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 19:38:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1403 transitions. [2020-10-15 19:38:11,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 19:38:11,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:11,517 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:11,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:11,732 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:11,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:11,733 INFO L82 PathProgramCache]: Analyzing trace with hash 915971432, now seen corresponding path program 9 times [2020-10-15 19:38:11,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:11,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737820892] [2020-10-15 19:38:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:11,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737820892] [2020-10-15 19:38:11,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024221521] [2020-10-15 19:38:11,973 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:12,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 19:38:12,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:38:12,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 19:38:12,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:12,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:12,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-15 19:38:12,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468661485] [2020-10-15 19:38:12,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 19:38:12,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:12,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 19:38:12,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:38:12,069 INFO L87 Difference]: Start difference. First operand 585 states and 1403 transitions. Second operand 23 states. [2020-10-15 19:38:12,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:12,753 INFO L93 Difference]: Finished difference Result 1731 states and 4053 transitions. [2020-10-15 19:38:12,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 19:38:12,753 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-15 19:38:12,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:12,759 INFO L225 Difference]: With dead ends: 1731 [2020-10-15 19:38:12,759 INFO L226 Difference]: Without dead ends: 816 [2020-10-15 19:38:12,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=566, Invalid=1414, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 19:38:12,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2020-10-15 19:38:12,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 569. [2020-10-15 19:38:12,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-10-15 19:38:12,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1355 transitions. [2020-10-15 19:38:12,776 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1355 transitions. Word has length 35 [2020-10-15 19:38:12,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:12,777 INFO L481 AbstractCegarLoop]: Abstraction has 569 states and 1355 transitions. [2020-10-15 19:38:12,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 19:38:12,777 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1355 transitions. [2020-10-15 19:38:12,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 19:38:12,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:12,779 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:12,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:12,993 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:12,994 INFO L82 PathProgramCache]: Analyzing trace with hash -570341976, now seen corresponding path program 10 times [2020-10-15 19:38:12,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:12,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839349060] [2020-10-15 19:38:12,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:13,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839349060] [2020-10-15 19:38:13,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341168513] [2020-10-15 19:38:13,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:13,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:38:13,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:38:13,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 19:38:13,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:13,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:13,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-15 19:38:13,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802695617] [2020-10-15 19:38:13,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 19:38:13,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:13,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 19:38:13,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:38:13,371 INFO L87 Difference]: Start difference. First operand 569 states and 1355 transitions. Second operand 23 states. [2020-10-15 19:38:14,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:14,024 INFO L93 Difference]: Finished difference Result 2131 states and 4974 transitions. [2020-10-15 19:38:14,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 19:38:14,024 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-15 19:38:14,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:14,029 INFO L225 Difference]: With dead ends: 2131 [2020-10-15 19:38:14,029 INFO L226 Difference]: Without dead ends: 792 [2020-10-15 19:38:14,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=558, Invalid=1422, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 19:38:14,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2020-10-15 19:38:14,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 553. [2020-10-15 19:38:14,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-10-15 19:38:14,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1307 transitions. [2020-10-15 19:38:14,047 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1307 transitions. Word has length 35 [2020-10-15 19:38:14,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:14,047 INFO L481 AbstractCegarLoop]: Abstraction has 553 states and 1307 transitions. [2020-10-15 19:38:14,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 19:38:14,048 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1307 transitions. [2020-10-15 19:38:14,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 19:38:14,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:14,050 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:14,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-15 19:38:14,264 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:14,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:14,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1306582504, now seen corresponding path program 11 times [2020-10-15 19:38:14,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:14,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817245770] [2020-10-15 19:38:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:14,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817245770] [2020-10-15 19:38:14,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749072024] [2020-10-15 19:38:14,477 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:14,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 19:38:14,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:38:14,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 19:38:14,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:14,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:14,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-15 19:38:14,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593013945] [2020-10-15 19:38:14,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 19:38:14,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:14,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 19:38:14,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:38:14,573 INFO L87 Difference]: Start difference. First operand 553 states and 1307 transitions. Second operand 23 states. [2020-10-15 19:38:15,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:15,217 INFO L93 Difference]: Finished difference Result 2670 states and 6229 transitions. [2020-10-15 19:38:15,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 19:38:15,218 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-15 19:38:15,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:15,222 INFO L225 Difference]: With dead ends: 2670 [2020-10-15 19:38:15,222 INFO L226 Difference]: Without dead ends: 768 [2020-10-15 19:38:15,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=588, Invalid=1482, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 19:38:15,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-10-15 19:38:15,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 537. [2020-10-15 19:38:15,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2020-10-15 19:38:15,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1259 transitions. [2020-10-15 19:38:15,237 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1259 transitions. Word has length 35 [2020-10-15 19:38:15,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:15,237 INFO L481 AbstractCegarLoop]: Abstraction has 537 states and 1259 transitions. [2020-10-15 19:38:15,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 19:38:15,237 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1259 transitions. [2020-10-15 19:38:15,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 19:38:15,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:15,239 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:15,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 19:38:15,454 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:15,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:15,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1144743464, now seen corresponding path program 12 times [2020-10-15 19:38:15,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:15,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816578794] [2020-10-15 19:38:15,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:15,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816578794] [2020-10-15 19:38:15,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110201483] [2020-10-15 19:38:15,698 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:15,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-15 19:38:15,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:38:15,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 19:38:15,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:15,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:15,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-15 19:38:15,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468145572] [2020-10-15 19:38:15,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 19:38:15,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:15,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 19:38:15,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:38:15,857 INFO L87 Difference]: Start difference. First operand 537 states and 1259 transitions. Second operand 23 states. [2020-10-15 19:38:16,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:16,741 INFO L93 Difference]: Finished difference Result 3250 states and 7573 transitions. [2020-10-15 19:38:16,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 19:38:16,742 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-15 19:38:16,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:16,755 INFO L225 Difference]: With dead ends: 3250 [2020-10-15 19:38:16,755 INFO L226 Difference]: Without dead ends: 2437 [2020-10-15 19:38:16,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 19:38:16,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2020-10-15 19:38:16,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 1276. [2020-10-15 19:38:16,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1276 states. [2020-10-15 19:38:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 3101 transitions. [2020-10-15 19:38:16,799 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 3101 transitions. Word has length 35 [2020-10-15 19:38:16,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:16,799 INFO L481 AbstractCegarLoop]: Abstraction has 1276 states and 3101 transitions. [2020-10-15 19:38:16,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 19:38:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 3101 transitions. [2020-10-15 19:38:16,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 19:38:16,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:16,802 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:17,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-15 19:38:17,016 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:17,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:17,016 INFO L82 PathProgramCache]: Analyzing trace with hash 909108414, now seen corresponding path program 13 times [2020-10-15 19:38:17,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:17,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15855241] [2020-10-15 19:38:17,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 19:38:17,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15855241] [2020-10-15 19:38:17,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221751677] [2020-10-15 19:38:17,198 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:17,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 19:38:17,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 19:38:17,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:17,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-15 19:38:17,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991600689] [2020-10-15 19:38:17,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 19:38:17,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:17,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 19:38:17,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:38:17,288 INFO L87 Difference]: Start difference. First operand 1276 states and 3101 transitions. Second operand 21 states. [2020-10-15 19:38:18,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:18,049 INFO L93 Difference]: Finished difference Result 2721 states and 6420 transitions. [2020-10-15 19:38:18,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 19:38:18,050 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-15 19:38:18,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:18,061 INFO L225 Difference]: With dead ends: 2721 [2020-10-15 19:38:18,061 INFO L226 Difference]: Without dead ends: 2040 [2020-10-15 19:38:18,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=690, Invalid=1860, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 19:38:18,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2020-10-15 19:38:18,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1192. [2020-10-15 19:38:18,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2020-10-15 19:38:18,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 2873 transitions. [2020-10-15 19:38:18,098 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 2873 transitions. Word has length 35 [2020-10-15 19:38:18,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:18,099 INFO L481 AbstractCegarLoop]: Abstraction has 1192 states and 2873 transitions. [2020-10-15 19:38:18,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 19:38:18,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 2873 transitions. [2020-10-15 19:38:18,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 19:38:18,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:18,102 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:18,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:18,316 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:18,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:18,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1383117118, now seen corresponding path program 14 times [2020-10-15 19:38:18,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:18,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999066080] [2020-10-15 19:38:18,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 19:38:18,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999066080] [2020-10-15 19:38:18,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868535057] [2020-10-15 19:38:18,498 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:18,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:38:18,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:38:18,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 19:38:18,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 19:38:18,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:18,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-10-15 19:38:18,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8280646] [2020-10-15 19:38:18,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 19:38:18,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:18,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 19:38:18,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:38:18,579 INFO L87 Difference]: Start difference. First operand 1192 states and 2873 transitions. Second operand 19 states. [2020-10-15 19:38:19,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:19,152 INFO L93 Difference]: Finished difference Result 2550 states and 5976 transitions. [2020-10-15 19:38:19,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 19:38:19,153 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-15 19:38:19,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:19,162 INFO L225 Difference]: With dead ends: 2550 [2020-10-15 19:38:19,163 INFO L226 Difference]: Without dead ends: 1781 [2020-10-15 19:38:19,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=511, Invalid=1381, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 19:38:19,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2020-10-15 19:38:19,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1058. [2020-10-15 19:38:19,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1058 states. [2020-10-15 19:38:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 2526 transitions. [2020-10-15 19:38:19,193 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 2526 transitions. Word has length 35 [2020-10-15 19:38:19,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:19,194 INFO L481 AbstractCegarLoop]: Abstraction has 1058 states and 2526 transitions. [2020-10-15 19:38:19,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 19:38:19,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 2526 transitions. [2020-10-15 19:38:19,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 19:38:19,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:19,197 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:19,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 19:38:19,413 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:19,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:19,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1638948286, now seen corresponding path program 15 times [2020-10-15 19:38:19,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:19,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484164816] [2020-10-15 19:38:19,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-15 19:38:19,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484164816] [2020-10-15 19:38:19,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626579980] [2020-10-15 19:38:19,530 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:19,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 19:38:19,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:38:19,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 19:38:19,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-15 19:38:19,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:19,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-15 19:38:19,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494733736] [2020-10-15 19:38:19,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:38:19,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:19,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:38:19,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:38:19,612 INFO L87 Difference]: Start difference. First operand 1058 states and 2526 transitions. Second operand 17 states. [2020-10-15 19:38:20,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:20,061 INFO L93 Difference]: Finished difference Result 2371 states and 5518 transitions. [2020-10-15 19:38:20,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 19:38:20,061 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-15 19:38:20,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:20,068 INFO L225 Difference]: With dead ends: 2371 [2020-10-15 19:38:20,069 INFO L226 Difference]: Without dead ends: 1444 [2020-10-15 19:38:20,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 19:38:20,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2020-10-15 19:38:20,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 874. [2020-10-15 19:38:20,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2020-10-15 19:38:20,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2060 transitions. [2020-10-15 19:38:20,090 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2060 transitions. Word has length 35 [2020-10-15 19:38:20,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:20,090 INFO L481 AbstractCegarLoop]: Abstraction has 874 states and 2060 transitions. [2020-10-15 19:38:20,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:38:20,090 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2060 transitions. [2020-10-15 19:38:20,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 19:38:20,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:20,093 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:20,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 19:38:20,308 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:20,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:20,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1615402434, now seen corresponding path program 16 times [2020-10-15 19:38:20,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:20,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685107521] [2020-10-15 19:38:20,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-15 19:38:20,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685107521] [2020-10-15 19:38:20,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998406828] [2020-10-15 19:38:20,419 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:20,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:38:20,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:38:20,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 19:38:20,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-15 19:38:20,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:20,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-10-15 19:38:20,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629062623] [2020-10-15 19:38:20,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:38:20,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:20,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:38:20,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:38:20,494 INFO L87 Difference]: Start difference. First operand 874 states and 2060 transitions. Second operand 15 states. [2020-10-15 19:38:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:20,818 INFO L93 Difference]: Finished difference Result 1669 states and 3808 transitions. [2020-10-15 19:38:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:38:20,818 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-15 19:38:20,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:20,822 INFO L225 Difference]: With dead ends: 1669 [2020-10-15 19:38:20,823 INFO L226 Difference]: Without dead ends: 744 [2020-10-15 19:38:20,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2020-10-15 19:38:20,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-10-15 19:38:20,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 521. [2020-10-15 19:38:20,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-10-15 19:38:20,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1211 transitions. [2020-10-15 19:38:20,834 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1211 transitions. Word has length 35 [2020-10-15 19:38:20,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:20,834 INFO L481 AbstractCegarLoop]: Abstraction has 521 states and 1211 transitions. [2020-10-15 19:38:20,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:38:20,834 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1211 transitions. [2020-10-15 19:38:20,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 19:38:20,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:20,836 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:21,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 19:38:21,050 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:21,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:21,050 INFO L82 PathProgramCache]: Analyzing trace with hash 236248680, now seen corresponding path program 17 times [2020-10-15 19:38:21,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:21,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727634728] [2020-10-15 19:38:21,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:21,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727634728] [2020-10-15 19:38:21,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579745362] [2020-10-15 19:38:21,262 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:21,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 19:38:21,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:38:21,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 19:38:21,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:21,359 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:21,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:21,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-15 19:38:21,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004490382] [2020-10-15 19:38:21,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 19:38:21,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:21,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 19:38:21,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:38:21,365 INFO L87 Difference]: Start difference. First operand 521 states and 1211 transitions. Second operand 23 states. [2020-10-15 19:38:21,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:21,911 INFO L93 Difference]: Finished difference Result 1734 states and 4025 transitions. [2020-10-15 19:38:21,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 19:38:21,912 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-15 19:38:21,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:21,916 INFO L225 Difference]: With dead ends: 1734 [2020-10-15 19:38:21,916 INFO L226 Difference]: Without dead ends: 894 [2020-10-15 19:38:21,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=544, Invalid=1348, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 19:38:21,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2020-10-15 19:38:21,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 582. [2020-10-15 19:38:21,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2020-10-15 19:38:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1364 transitions. [2020-10-15 19:38:21,928 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1364 transitions. Word has length 35 [2020-10-15 19:38:21,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:21,929 INFO L481 AbstractCegarLoop]: Abstraction has 582 states and 1364 transitions. [2020-10-15 19:38:21,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 19:38:21,929 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1364 transitions. [2020-10-15 19:38:21,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 19:38:21,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:21,931 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:22,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:22,143 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:22,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:22,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1268277900, now seen corresponding path program 18 times [2020-10-15 19:38:22,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:22,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246229040] [2020-10-15 19:38:22,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:22,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246229040] [2020-10-15 19:38:22,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898892099] [2020-10-15 19:38:22,350 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:22,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-15 19:38:22,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:38:22,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 19:38:22,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:22,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:22,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-15 19:38:22,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239799487] [2020-10-15 19:38:22,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 19:38:22,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:22,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 19:38:22,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:38:22,437 INFO L87 Difference]: Start difference. First operand 582 states and 1364 transitions. Second operand 23 states. [2020-10-15 19:38:23,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:23,029 INFO L93 Difference]: Finished difference Result 1717 states and 3982 transitions. [2020-10-15 19:38:23,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 19:38:23,030 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-15 19:38:23,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:23,034 INFO L225 Difference]: With dead ends: 1717 [2020-10-15 19:38:23,034 INFO L226 Difference]: Without dead ends: 774 [2020-10-15 19:38:23,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=538, Invalid=1354, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 19:38:23,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2020-10-15 19:38:23,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 538. [2020-10-15 19:38:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2020-10-15 19:38:23,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1256 transitions. [2020-10-15 19:38:23,045 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1256 transitions. Word has length 35 [2020-10-15 19:38:23,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:23,045 INFO L481 AbstractCegarLoop]: Abstraction has 538 states and 1256 transitions. [2020-10-15 19:38:23,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 19:38:23,045 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1256 transitions. [2020-10-15 19:38:23,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 19:38:23,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:23,047 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:23,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:23,261 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:23,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:23,262 INFO L82 PathProgramCache]: Analyzing trace with hash -905226112, now seen corresponding path program 19 times [2020-10-15 19:38:23,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:23,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227139216] [2020-10-15 19:38:23,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:23,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227139216] [2020-10-15 19:38:23,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076157586] [2020-10-15 19:38:23,459 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:23,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 19:38:23,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:23,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:23,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-15 19:38:23,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713444973] [2020-10-15 19:38:23,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 19:38:23,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:23,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 19:38:23,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:38:23,542 INFO L87 Difference]: Start difference. First operand 538 states and 1256 transitions. Second operand 23 states. [2020-10-15 19:38:24,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:24,151 INFO L93 Difference]: Finished difference Result 2063 states and 4783 transitions. [2020-10-15 19:38:24,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 19:38:24,151 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-15 19:38:24,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:24,156 INFO L225 Difference]: With dead ends: 2063 [2020-10-15 19:38:24,156 INFO L226 Difference]: Without dead ends: 716 [2020-10-15 19:38:24,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=569, Invalid=1411, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 19:38:24,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2020-10-15 19:38:24,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 494. [2020-10-15 19:38:24,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-10-15 19:38:24,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1148 transitions. [2020-10-15 19:38:24,166 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1148 transitions. Word has length 35 [2020-10-15 19:38:24,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:24,167 INFO L481 AbstractCegarLoop]: Abstraction has 494 states and 1148 transitions. [2020-10-15 19:38:24,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 19:38:24,167 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1148 transitions. [2020-10-15 19:38:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 19:38:24,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:24,169 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:24,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-15 19:38:24,383 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:24,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:24,383 INFO L82 PathProgramCache]: Analyzing trace with hash 95191180, now seen corresponding path program 20 times [2020-10-15 19:38:24,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:24,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279078582] [2020-10-15 19:38:24,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:24,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:24,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279078582] [2020-10-15 19:38:24,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394165419] [2020-10-15 19:38:24,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:24,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:38:24,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:38:24,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 19:38:24,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:24,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:24,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-15 19:38:24,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059268674] [2020-10-15 19:38:24,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 19:38:24,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:24,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 19:38:24,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:38:24,686 INFO L87 Difference]: Start difference. First operand 494 states and 1148 transitions. Second operand 23 states. [2020-10-15 19:38:25,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:25,295 INFO L93 Difference]: Finished difference Result 2541 states and 5902 transitions. [2020-10-15 19:38:25,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 19:38:25,295 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-15 19:38:25,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:25,298 INFO L225 Difference]: With dead ends: 2541 [2020-10-15 19:38:25,298 INFO L226 Difference]: Without dead ends: 658 [2020-10-15 19:38:25,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 19:38:25,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-10-15 19:38:25,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 450. [2020-10-15 19:38:25,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-15 19:38:25,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1040 transitions. [2020-10-15 19:38:25,310 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1040 transitions. Word has length 35 [2020-10-15 19:38:25,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:25,310 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 1040 transitions. [2020-10-15 19:38:25,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 19:38:25,310 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1040 transitions. [2020-10-15 19:38:25,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 19:38:25,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:25,312 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:25,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-15 19:38:25,526 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:25,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:25,527 INFO L82 PathProgramCache]: Analyzing trace with hash -576465512, now seen corresponding path program 21 times [2020-10-15 19:38:25,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:25,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242239009] [2020-10-15 19:38:25,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:25,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242239009] [2020-10-15 19:38:25,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564080709] [2020-10-15 19:38:25,792 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:25,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-15 19:38:25,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:38:25,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-15 19:38:25,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:25,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:25,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-15 19:38:25,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237063632] [2020-10-15 19:38:25,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 19:38:25,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:25,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 19:38:25,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:38:25,908 INFO L87 Difference]: Start difference. First operand 450 states and 1040 transitions. Second operand 23 states. [2020-10-15 19:38:26,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:26,663 INFO L93 Difference]: Finished difference Result 2473 states and 5749 transitions. [2020-10-15 19:38:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 19:38:26,664 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-15 19:38:26,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:26,677 INFO L225 Difference]: With dead ends: 2473 [2020-10-15 19:38:26,681 INFO L226 Difference]: Without dead ends: 1507 [2020-10-15 19:38:26,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=823, Invalid=2257, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 19:38:26,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2020-10-15 19:38:26,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 771. [2020-10-15 19:38:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 771 states. [2020-10-15 19:38:26,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1835 transitions. [2020-10-15 19:38:26,701 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1835 transitions. Word has length 35 [2020-10-15 19:38:26,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:26,702 INFO L481 AbstractCegarLoop]: Abstraction has 771 states and 1835 transitions. [2020-10-15 19:38:26,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 19:38:26,702 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1835 transitions. [2020-10-15 19:38:26,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 19:38:26,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:26,704 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:26,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:26,919 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:26,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:26,919 INFO L82 PathProgramCache]: Analyzing trace with hash -365571194, now seen corresponding path program 22 times [2020-10-15 19:38:26,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:26,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724883792] [2020-10-15 19:38:26,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:27,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724883792] [2020-10-15 19:38:27,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756452381] [2020-10-15 19:38:27,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:27,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:38:27,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:38:27,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 19:38:27,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:38:27,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:27,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-15 19:38:27,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541216364] [2020-10-15 19:38:27,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 19:38:27,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:27,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 19:38:27,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:38:27,195 INFO L87 Difference]: Start difference. First operand 771 states and 1835 transitions. Second operand 21 states. [2020-10-15 19:38:27,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:27,793 INFO L93 Difference]: Finished difference Result 1951 states and 4562 transitions. [2020-10-15 19:38:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 19:38:27,794 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-15 19:38:27,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:27,799 INFO L225 Difference]: With dead ends: 1951 [2020-10-15 19:38:27,799 INFO L226 Difference]: Without dead ends: 1081 [2020-10-15 19:38:27,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=628, Invalid=1724, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 19:38:27,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2020-10-15 19:38:27,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 637. [2020-10-15 19:38:27,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2020-10-15 19:38:27,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1488 transitions. [2020-10-15 19:38:27,813 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1488 transitions. Word has length 35 [2020-10-15 19:38:27,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:27,814 INFO L481 AbstractCegarLoop]: Abstraction has 637 states and 1488 transitions. [2020-10-15 19:38:27,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 19:38:27,814 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1488 transitions. [2020-10-15 19:38:27,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 19:38:27,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:27,815 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:28,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-15 19:38:28,029 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:28,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:28,030 INFO L82 PathProgramCache]: Analyzing trace with hash 2092017522, now seen corresponding path program 23 times [2020-10-15 19:38:28,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:28,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963824843] [2020-10-15 19:38:28,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 19:38:28,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963824843] [2020-10-15 19:38:28,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273635095] [2020-10-15 19:38:28,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:28,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-15 19:38:28,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:38:28,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 19:38:28,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 19:38:28,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:28,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-10-15 19:38:28,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030340416] [2020-10-15 19:38:28,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 19:38:28,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:28,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 19:38:28,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:38:28,247 INFO L87 Difference]: Start difference. First operand 637 states and 1488 transitions. Second operand 19 states. [2020-10-15 19:38:28,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:28,769 INFO L93 Difference]: Finished difference Result 1790 states and 4143 transitions. [2020-10-15 19:38:28,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:38:28,770 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-15 19:38:28,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:28,773 INFO L225 Difference]: With dead ends: 1790 [2020-10-15 19:38:28,773 INFO L226 Difference]: Without dead ends: 744 [2020-10-15 19:38:28,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 19:38:28,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-10-15 19:38:28,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 453. [2020-10-15 19:38:28,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-15 19:38:28,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1022 transitions. [2020-10-15 19:38:28,784 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1022 transitions. Word has length 35 [2020-10-15 19:38:28,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:28,784 INFO L481 AbstractCegarLoop]: Abstraction has 453 states and 1022 transitions. [2020-10-15 19:38:28,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 19:38:28,784 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1022 transitions. [2020-10-15 19:38:28,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-15 19:38:28,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:38:28,785 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:38:28,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:29,000 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-15 19:38:29,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:38:29,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1602760798, now seen corresponding path program 24 times [2020-10-15 19:38:29,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:38:29,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164066565] [2020-10-15 19:38:29,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:38:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:38:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 19:38:29,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164066565] [2020-10-15 19:38:29,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297461039] [2020-10-15 19:38:29,112 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:38:29,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 19:38:29,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:38:29,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 19:38:29,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:38:29,195 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 34 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 19:38:29,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:38:29,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-15 19:38:29,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497706920] [2020-10-15 19:38:29,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:38:29,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:38:29,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:38:29,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:38:29,197 INFO L87 Difference]: Start difference. First operand 453 states and 1022 transitions. Second operand 17 states. [2020-10-15 19:38:29,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:38:29,619 INFO L93 Difference]: Finished difference Result 1084 states and 2413 transitions. [2020-10-15 19:38:29,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 19:38:29,619 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-15 19:38:29,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:38:29,620 INFO L225 Difference]: With dead ends: 1084 [2020-10-15 19:38:29,620 INFO L226 Difference]: Without dead ends: 0 [2020-10-15 19:38:29,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=868, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 19:38:29,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-15 19:38:29,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-15 19:38:29,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-15 19:38:29,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-15 19:38:29,621 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-10-15 19:38:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:38:29,621 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-15 19:38:29,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:38:29,622 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-15 19:38:29,622 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-15 19:38:29,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 19:38:29,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:38:29 BasicIcfg [2020-10-15 19:38:29,829 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 19:38:29,835 INFO L168 Benchmark]: Toolchain (without parser) took 25103.51 ms. Allocated memory was 249.6 MB in the beginning and 555.2 MB in the end (delta: 305.7 MB). Free memory was 204.9 MB in the beginning and 508.8 MB in the end (delta: -303.9 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.2 GB. [2020-10-15 19:38:29,835 INFO L168 Benchmark]: CDTParser took 1.45 ms. Allocated memory is still 249.6 MB. Free memory is still 225.9 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 19:38:29,836 INFO L168 Benchmark]: CACSL2BoogieTranslator took 410.94 ms. Allocated memory was 249.6 MB in the beginning and 310.9 MB in the end (delta: 61.3 MB). Free memory was 204.9 MB in the beginning and 286.0 MB in the end (delta: -81.1 MB). Peak memory consumption was 28.2 MB. Max. memory is 14.2 GB. [2020-10-15 19:38:29,837 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.31 ms. Allocated memory is still 310.9 MB. Free memory was 286.0 MB in the beginning and 283.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 19:38:29,837 INFO L168 Benchmark]: Boogie Preprocessor took 51.12 ms. Allocated memory is still 310.9 MB. Free memory was 283.5 MB in the beginning and 282.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.2 GB. [2020-10-15 19:38:29,838 INFO L168 Benchmark]: RCFGBuilder took 317.28 ms. Allocated memory is still 310.9 MB. Free memory was 282.2 MB in the beginning and 264.8 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 14.2 GB. [2020-10-15 19:38:29,838 INFO L168 Benchmark]: TraceAbstraction took 24263.98 ms. Allocated memory was 310.9 MB in the beginning and 555.2 MB in the end (delta: 244.3 MB). Free memory was 264.8 MB in the beginning and 508.8 MB in the end (delta: -244.0 MB). Peak memory consumption was 347.3 kB. Max. memory is 14.2 GB. [2020-10-15 19:38:29,843 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.45 ms. Allocated memory is still 249.6 MB. Free memory is still 225.9 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 410.94 ms. Allocated memory was 249.6 MB in the beginning and 310.9 MB in the end (delta: 61.3 MB). Free memory was 204.9 MB in the beginning and 286.0 MB in the end (delta: -81.1 MB). Peak memory consumption was 28.2 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 46.31 ms. Allocated memory is still 310.9 MB. Free memory was 286.0 MB in the beginning and 283.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 51.12 ms. Allocated memory is still 310.9 MB. Free memory was 283.5 MB in the beginning and 282.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.2 GB. * RCFGBuilder took 317.28 ms. Allocated memory is still 310.9 MB. Free memory was 282.2 MB in the beginning and 264.8 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 14.2 GB. * TraceAbstraction took 24263.98 ms. Allocated memory was 310.9 MB in the beginning and 555.2 MB in the end (delta: 244.3 MB). Free memory was 264.8 MB in the beginning and 508.8 MB in the end (delta: -244.0 MB). Peak memory consumption was 347.3 kB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 351 VarBasedMoverChecksPositive, 8 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 8 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 65 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 0.8s, 57 PlacesBefore, 27 PlacesAfterwards, 56 TransitionsBefore, 24 TransitionsAfterwards, 528 CoEnabledTransitionPairs, 4 FixpointIterations, 16 TrivialSequentialCompositions, 12 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 2 ChoiceCompositions, 34 TotalNumberOfCompositions, 866 MoverChecksTotal - PositiveResult [Line: 46]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 24.0s, OverallIterations: 26, TraceHistogramMax: 5, AutomataDifference: 10.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.8s, HoareTripleCheckerStatistics: 1926 SDtfs, 9011 SDslu, 9317 SDs, 0 SdLazy, 5664 SolverSat, 1140 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1525 GetRequests, 751 SyntacticMatches, 0 SemanticMatches, 774 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6305 ImplicationChecksByTransitivity, 8.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1276occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 26 MinimizatonAttempts, 7142 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 1613 NumberOfCodeBlocks, 1613 NumberOfCodeBlocksAsserted, 128 NumberOfCheckSat, 1562 ConstructedInterpolants, 0 QuantifiedInterpolants, 141580 SizeOfPredicates, 284 NumberOfNonLiveVariables, 2584 ConjunctsInSsa, 345 ConjunctsInUnsatCore, 51 InterpolantComputations, 3 PerfectInterpolantSequences, 1427/1996 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 correct! Received shutdown request...