/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -i ../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-16 01:48:38,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-16 01:48:38,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-16 01:48:38,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-16 01:48:38,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-16 01:48:38,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-16 01:48:38,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-16 01:48:38,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-16 01:48:38,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-16 01:48:38,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-16 01:48:38,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-16 01:48:38,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-16 01:48:38,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-16 01:48:38,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-16 01:48:38,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-16 01:48:38,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-16 01:48:38,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-16 01:48:38,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-16 01:48:38,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-16 01:48:38,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-16 01:48:38,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-16 01:48:38,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-16 01:48:38,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-16 01:48:38,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-16 01:48:38,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-16 01:48:38,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-16 01:48:38,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-16 01:48:38,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-16 01:48:38,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-16 01:48:38,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-16 01:48:38,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-16 01:48:38,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-16 01:48:38,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-16 01:48:38,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-16 01:48:38,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-16 01:48:38,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-16 01:48:38,271 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-09-16 01:48:38,299 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-16 01:48:38,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-16 01:48:38,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-16 01:48:38,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-16 01:48:38,301 INFO L138 SettingsManager]: * Use SBE=true [2020-09-16 01:48:38,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-16 01:48:38,301 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-16 01:48:38,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-16 01:48:38,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-16 01:48:38,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-16 01:48:38,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-16 01:48:38,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-16 01:48:38,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-16 01:48:38,303 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-16 01:48:38,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-16 01:48:38,303 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-16 01:48:38,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-16 01:48:38,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-16 01:48:38,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-16 01:48:38,304 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-16 01:48:38,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-16 01:48:38,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-16 01:48:38,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-16 01:48:38,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-16 01:48:38,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-16 01:48:38,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-16 01:48:38,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-16 01:48:38,306 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-09-16 01:48:38,306 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-16 01:48:38,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-16 01:48:38,306 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-09-16 01:48:38,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-16 01:48:38,821 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-16 01:48:38,826 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-16 01:48:38,828 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-16 01:48:38,829 INFO L275 PluginConnector]: CDTParser initialized [2020-09-16 01:48:38,832 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-09-16 01:48:38,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c849709b5/14861acc55b740b69cba3b8a6c8b42e0/FLAG6d4f10cfe [2020-09-16 01:48:39,509 INFO L306 CDTParser]: Found 1 translation units. [2020-09-16 01:48:39,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-09-16 01:48:39,511 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2020-09-16 01:48:39,511 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2020-09-16 01:48:39,511 WARN L117 ultiparseSymbolTable]: System include stdbool.h could not be resolved by CDT -- only built-in system includes are available. [2020-09-16 01:48:39,564 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c849709b5/14861acc55b740b69cba3b8a6c8b42e0/FLAG6d4f10cfe [2020-09-16 01:48:39,851 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c849709b5/14861acc55b740b69cba3b8a6c8b42e0 [2020-09-16 01:48:39,870 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-16 01:48:39,879 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-16 01:48:39,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-16 01:48:39,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-16 01:48:39,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-16 01:48:39,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 01:48:39" (1/1) ... [2020-09-16 01:48:39,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a9fb01e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:48:39, skipping insertion in model container [2020-09-16 01:48:39,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 01:48:39" (1/1) ... [2020-09-16 01:48:39,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-16 01:48:39,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-16 01:48:40,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-16 01:48:40,171 INFO L203 MainTranslator]: Completed pre-run [2020-09-16 01:48:40,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-16 01:48:40,294 INFO L208 MainTranslator]: Completed translation [2020-09-16 01:48:40,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:48:40 WrapperNode [2020-09-16 01:48:40,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-16 01:48:40,296 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-16 01:48:40,296 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-16 01:48:40,296 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-16 01:48:40,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:48:40" (1/1) ... [2020-09-16 01:48:40,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:48:40" (1/1) ... [2020-09-16 01:48:40,341 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-16 01:48:40,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-16 01:48:40,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-16 01:48:40,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-16 01:48:40,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:48:40" (1/1) ... [2020-09-16 01:48:40,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:48:40" (1/1) ... [2020-09-16 01:48:40,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:48:40" (1/1) ... [2020-09-16 01:48:40,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:48:40" (1/1) ... [2020-09-16 01:48:40,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:48:40" (1/1) ... [2020-09-16 01:48:40,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:48:40" (1/1) ... [2020-09-16 01:48:40,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:48:40" (1/1) ... [2020-09-16 01:48:40,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-16 01:48:40,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-16 01:48:40,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-16 01:48:40,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-16 01:48:40,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:48:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-16 01:48:40,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-16 01:48:40,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-16 01:48:40,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-16 01:48:40,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-16 01:48:40,451 INFO L130 BoogieDeclarations]: Found specification of procedure secondIncrement [2020-09-16 01:48:40,451 INFO L138 BoogieDeclarations]: Found implementation of procedure secondIncrement [2020-09-16 01:48:40,451 INFO L130 BoogieDeclarations]: Found specification of procedure firstIncrement [2020-09-16 01:48:40,452 INFO L138 BoogieDeclarations]: Found implementation of procedure firstIncrement [2020-09-16 01:48:40,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-16 01:48:40,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-16 01:48:40,454 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-16 01:48:40,731 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-16 01:48:40,731 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-16 01:48:40,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 01:48:40 BoogieIcfgContainer [2020-09-16 01:48:40,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-16 01:48:40,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-16 01:48:40,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-16 01:48:40,743 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-16 01:48:40,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 01:48:39" (1/3) ... [2020-09-16 01:48:40,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e102f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 01:48:40, skipping insertion in model container [2020-09-16 01:48:40,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:48:40" (2/3) ... [2020-09-16 01:48:40,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e102f07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 01:48:40, skipping insertion in model container [2020-09-16 01:48:40,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 01:48:40" (3/3) ... [2020-09-16 01:48:40,748 INFO L109 eAbstractionObserver]: Analyzing ICFG NonAtomicIncrement_2Threads.c [2020-09-16 01:48:40,760 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-16 01:48:40,761 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-16 01:48:40,772 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-16 01:48:40,773 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-16 01:48:40,845 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,846 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,846 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,846 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,847 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,852 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,853 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,853 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,853 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,853 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,854 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,854 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,855 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,858 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,859 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,859 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,859 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,860 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,860 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,860 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,860 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,861 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,874 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,875 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,875 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,875 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,876 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,900 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,901 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,901 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,901 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,901 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:48:40,946 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-16 01:48:40,972 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-16 01:48:40,972 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-16 01:48:40,972 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-16 01:48:40,973 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-16 01:48:40,973 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-16 01:48:40,973 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-16 01:48:40,973 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-16 01:48:40,973 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-16 01:48:40,992 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 56 transitions, 134 flow [2020-09-16 01:48:40,995 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 56 transitions, 134 flow [2020-09-16 01:48:41,046 INFO L129 PetriNetUnfolder]: 5/56 cut-off events. [2020-09-16 01:48:41,046 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-09-16 01:48:41,053 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. [2020-09-16 01:48:41,055 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 56 transitions, 134 flow [2020-09-16 01:48:41,091 INFO L129 PetriNetUnfolder]: 5/56 cut-off events. [2020-09-16 01:48:41,092 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-09-16 01:48:41,093 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. [2020-09-16 01:48:41,095 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 528 [2020-09-16 01:48:41,099 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-16 01:48:41,900 INFO L206 etLargeBlockEncoding]: Checked pairs total: 426 [2020-09-16 01:48:41,901 INFO L214 etLargeBlockEncoding]: Total number of compositions: 32 [2020-09-16 01:48:41,906 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 24 transitions, 70 flow [2020-09-16 01:48:41,923 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 70 states. [2020-09-16 01:48:41,926 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2020-09-16 01:48:41,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 01:48:41,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:48:41,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:48:41,939 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:48:41,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:48:41,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1474833226, now seen corresponding path program 1 times [2020-09-16 01:48:41,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:48:41,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100424059] [2020-09-16 01:48:41,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:48:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:48:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:48:42,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100424059] [2020-09-16 01:48:42,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 01:48:42,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-16 01:48:42,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1332614929] [2020-09-16 01:48:42,178 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:48:42,185 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:48:42,211 INFO L274 McrAutomatonBuilder]: Finished intersection with 38 states and 63 transitions. [2020-09-16 01:48:42,212 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:48:42,266 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [203#(< firstIncrementThread1of1ForFork0_~i~0 5)] [2020-09-16 01:48:42,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-16 01:48:42,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:48:42,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-16 01:48:42,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-16 01:48:42,290 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 4 states. [2020-09-16 01:48:42,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:48:42,331 INFO L93 Difference]: Finished difference Result 109 states and 241 transitions. [2020-09-16 01:48:42,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-16 01:48:42,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-09-16 01:48:42,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:48:42,349 INFO L225 Difference]: With dead ends: 109 [2020-09-16 01:48:42,350 INFO L226 Difference]: Without dead ends: 108 [2020-09-16 01:48:42,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-16 01:48:42,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-16 01:48:42,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-09-16 01:48:42,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-16 01:48:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 240 transitions. [2020-09-16 01:48:42,414 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 240 transitions. Word has length 15 [2020-09-16 01:48:42,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:48:42,414 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 240 transitions. [2020-09-16 01:48:42,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-16 01:48:42,415 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 240 transitions. [2020-09-16 01:48:42,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-16 01:48:42,417 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:48:42,417 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:48:42,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-16 01:48:42,418 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:48:42,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:48:42,418 INFO L82 PathProgramCache]: Analyzing trace with hash -456809054, now seen corresponding path program 1 times [2020-09-16 01:48:42,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:48:42,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493043109] [2020-09-16 01:48:42,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:48:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:48:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:48:42,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493043109] [2020-09-16 01:48:42,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894881195] [2020-09-16 01:48:42,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:48:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:48:42,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2020-09-16 01:48:42,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:48:42,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-16 01:48:42,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-16 01:48:42,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-09-16 01:48:42,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1458506814] [2020-09-16 01:48:42,582 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:48:42,585 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:48:42,593 INFO L274 McrAutomatonBuilder]: Finished intersection with 70 states and 131 transitions. [2020-09-16 01:48:42,594 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:48:42,691 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:48:42,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-16 01:48:42,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:48:42,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-16 01:48:42,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-16 01:48:42,693 INFO L87 Difference]: Start difference. First operand 108 states and 240 transitions. Second operand 3 states. [2020-09-16 01:48:42,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:48:42,713 INFO L93 Difference]: Finished difference Result 142 states and 322 transitions. [2020-09-16 01:48:42,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-16 01:48:42,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-09-16 01:48:42,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:48:42,720 INFO L225 Difference]: With dead ends: 142 [2020-09-16 01:48:42,720 INFO L226 Difference]: Without dead ends: 142 [2020-09-16 01:48:42,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-16 01:48:42,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-16 01:48:42,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 125. [2020-09-16 01:48:42,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-16 01:48:42,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 281 transitions. [2020-09-16 01:48:42,737 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 281 transitions. Word has length 19 [2020-09-16 01:48:42,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:48:42,740 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 281 transitions. [2020-09-16 01:48:42,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-16 01:48:42,740 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 281 transitions. [2020-09-16 01:48:42,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-16 01:48:42,742 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:48:42,742 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:48:42,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-16 01:48:42,958 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:48:42,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:48:42,959 INFO L82 PathProgramCache]: Analyzing trace with hash 166337548, now seen corresponding path program 1 times [2020-09-16 01:48:42,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:48:42,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811786355] [2020-09-16 01:48:42,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:48:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:48:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:48:43,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811786355] [2020-09-16 01:48:43,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902517658] [2020-09-16 01:48:43,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:48:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:48:43,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-16 01:48:43,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:48:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-16 01:48:43,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:48:43,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-09-16 01:48:43,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [281554328] [2020-09-16 01:48:43,133 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:48:43,136 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:48:43,146 INFO L274 McrAutomatonBuilder]: Finished intersection with 55 states and 96 transitions. [2020-09-16 01:48:43,146 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:48:43,459 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [1048#(< firstIncrementThread1of1ForFork0_~i~0 5), 1049#(< firstIncrementThread1of1ForFork0_~i~0 4), 1050#(or (< firstIncrementThread1of1ForFork0_~i~0 4) (<= 5 firstIncrementThread1of1ForFork0_~i~0)), 1051#(or (<= 4 firstIncrementThread1of1ForFork0_~i~0) (< firstIncrementThread1of1ForFork0_~i~0 3))] [2020-09-16 01:48:43,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 01:48:43,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:48:43,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 01:48:43,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-09-16 01:48:43,462 INFO L87 Difference]: Start difference. First operand 125 states and 281 transitions. Second operand 11 states. [2020-09-16 01:48:43,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:48:43,857 INFO L93 Difference]: Finished difference Result 302 states and 704 transitions. [2020-09-16 01:48:43,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 01:48:43,858 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-09-16 01:48:43,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:48:43,862 INFO L225 Difference]: With dead ends: 302 [2020-09-16 01:48:43,862 INFO L226 Difference]: Without dead ends: 302 [2020-09-16 01:48:43,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 78 SyntacticMatches, 17 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2020-09-16 01:48:43,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-09-16 01:48:43,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 273. [2020-09-16 01:48:43,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-09-16 01:48:43,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 633 transitions. [2020-09-16 01:48:43,887 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 633 transitions. Word has length 21 [2020-09-16 01:48:43,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:48:43,888 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 633 transitions. [2020-09-16 01:48:43,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 01:48:43,888 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 633 transitions. [2020-09-16 01:48:43,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-16 01:48:43,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:48:43,894 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:48:44,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:48:44,109 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:48:44,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:48:44,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1610812104, now seen corresponding path program 2 times [2020-09-16 01:48:44,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:48:44,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565283558] [2020-09-16 01:48:44,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:48:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:48:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-16 01:48:44,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565283558] [2020-09-16 01:48:44,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658423929] [2020-09-16 01:48:44,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 01:48:44,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 01:48:44,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:48:44,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-16 01:48:44,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:48:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-16 01:48:44,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:48:44,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-16 01:48:44,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1523036824] [2020-09-16 01:48:44,280 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:48:44,286 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:48:44,302 INFO L274 McrAutomatonBuilder]: Finished intersection with 87 states and 160 transitions. [2020-09-16 01:48:44,303 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:48:44,645 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:48:44,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 01:48:44,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:48:44,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 01:48:44,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-16 01:48:44,646 INFO L87 Difference]: Start difference. First operand 273 states and 633 transitions. Second operand 6 states. [2020-09-16 01:48:44,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:48:44,673 INFO L93 Difference]: Finished difference Result 360 states and 846 transitions. [2020-09-16 01:48:44,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-16 01:48:44,674 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-09-16 01:48:44,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:48:44,684 INFO L225 Difference]: With dead ends: 360 [2020-09-16 01:48:44,684 INFO L226 Difference]: Without dead ends: 360 [2020-09-16 01:48:44,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 41 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-16 01:48:44,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-09-16 01:48:44,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 331. [2020-09-16 01:48:44,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-09-16 01:48:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 775 transitions. [2020-09-16 01:48:44,726 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 775 transitions. Word has length 29 [2020-09-16 01:48:44,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:48:44,726 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 775 transitions. [2020-09-16 01:48:44,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 01:48:44,727 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 775 transitions. [2020-09-16 01:48:44,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-16 01:48:44,732 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:48:44,733 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:48:44,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:48:44,934 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:48:44,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:48:44,934 INFO L82 PathProgramCache]: Analyzing trace with hash 2034107570, now seen corresponding path program 3 times [2020-09-16 01:48:44,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:48:44,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038241524] [2020-09-16 01:48:44,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:48:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:48:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-16 01:48:45,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038241524] [2020-09-16 01:48:45,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115335118] [2020-09-16 01:48:45,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 01:48:45,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-16 01:48:45,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:48:45,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-16 01:48:45,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:48:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-16 01:48:45,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:48:45,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-16 01:48:45,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2061343231] [2020-09-16 01:48:45,109 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:48:45,114 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:48:45,130 INFO L274 McrAutomatonBuilder]: Finished intersection with 95 states and 176 transitions. [2020-09-16 01:48:45,130 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:48:45,501 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:48:45,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-16 01:48:45,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:48:45,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-16 01:48:45,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-16 01:48:45,503 INFO L87 Difference]: Start difference. First operand 331 states and 775 transitions. Second operand 7 states. [2020-09-16 01:48:45,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:48:45,525 INFO L93 Difference]: Finished difference Result 418 states and 988 transitions. [2020-09-16 01:48:45,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-16 01:48:45,526 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-09-16 01:48:45,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:48:45,529 INFO L225 Difference]: With dead ends: 418 [2020-09-16 01:48:45,529 INFO L226 Difference]: Without dead ends: 418 [2020-09-16 01:48:45,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 110 SyntacticMatches, 47 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-16 01:48:45,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-09-16 01:48:45,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 389. [2020-09-16 01:48:45,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2020-09-16 01:48:45,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 917 transitions. [2020-09-16 01:48:45,545 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 917 transitions. Word has length 31 [2020-09-16 01:48:45,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:48:45,546 INFO L479 AbstractCegarLoop]: Abstraction has 389 states and 917 transitions. [2020-09-16 01:48:45,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-16 01:48:45,546 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 917 transitions. [2020-09-16 01:48:45,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-16 01:48:45,548 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:48:45,548 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:48:45,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:48:45,763 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:48:45,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:48:45,764 INFO L82 PathProgramCache]: Analyzing trace with hash 799157276, now seen corresponding path program 4 times [2020-09-16 01:48:45,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:48:45,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783524899] [2020-09-16 01:48:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:48:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:48:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-16 01:48:45,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783524899] [2020-09-16 01:48:45,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623196848] [2020-09-16 01:48:45,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 01:48:45,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 01:48:45,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:48:45,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-16 01:48:45,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:48:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-09-16 01:48:45,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:48:45,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-16 01:48:45,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [655357094] [2020-09-16 01:48:45,940 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:48:45,944 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:48:45,962 INFO L274 McrAutomatonBuilder]: Finished intersection with 103 states and 192 transitions. [2020-09-16 01:48:45,963 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:48:46,405 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:48:46,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 01:48:46,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:48:46,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 01:48:46,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-16 01:48:46,407 INFO L87 Difference]: Start difference. First operand 389 states and 917 transitions. Second operand 8 states. [2020-09-16 01:48:46,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:48:46,440 INFO L93 Difference]: Finished difference Result 447 states and 1059 transitions. [2020-09-16 01:48:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 01:48:46,440 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-16 01:48:46,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:48:46,444 INFO L225 Difference]: With dead ends: 447 [2020-09-16 01:48:46,444 INFO L226 Difference]: Without dead ends: 447 [2020-09-16 01:48:46,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 118 SyntacticMatches, 53 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-16 01:48:46,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-09-16 01:48:46,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2020-09-16 01:48:46,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-09-16 01:48:46,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1059 transitions. [2020-09-16 01:48:46,458 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1059 transitions. Word has length 33 [2020-09-16 01:48:46,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:48:46,459 INFO L479 AbstractCegarLoop]: Abstraction has 447 states and 1059 transitions. [2020-09-16 01:48:46,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 01:48:46,459 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1059 transitions. [2020-09-16 01:48:46,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-16 01:48:46,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:48:46,461 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:48:46,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-16 01:48:46,674 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:48:46,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:48:46,675 INFO L82 PathProgramCache]: Analyzing trace with hash -577101562, now seen corresponding path program 5 times [2020-09-16 01:48:46,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:48:46,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889701414] [2020-09-16 01:48:46,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:48:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:48:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 41 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:48:47,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889701414] [2020-09-16 01:48:47,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862213822] [2020-09-16 01:48:47,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 01:48:47,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-16 01:48:47,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:48:47,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-16 01:48:47,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:48:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:48:47,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-16 01:48:47,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [21] total 23 [2020-09-16 01:48:47,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1227181234] [2020-09-16 01:48:47,218 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:48:47,222 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:48:47,244 INFO L274 McrAutomatonBuilder]: Finished intersection with 111 states and 208 transitions. [2020-09-16 01:48:47,245 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:48:47,334 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:48:47,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 01:48:47,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:48:47,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 01:48:47,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-09-16 01:48:47,335 INFO L87 Difference]: Start difference. First operand 447 states and 1059 transitions. Second operand 23 states. [2020-09-16 01:48:48,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:48:48,105 INFO L93 Difference]: Finished difference Result 1728 states and 4029 transitions. [2020-09-16 01:48:48,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-16 01:48:48,106 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-09-16 01:48:48,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:48:48,111 INFO L225 Difference]: With dead ends: 1728 [2020-09-16 01:48:48,112 INFO L226 Difference]: Without dead ends: 876 [2020-09-16 01:48:48,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=720, Invalid=1632, Unknown=0, NotChecked=0, Total=2352 [2020-09-16 01:48:48,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2020-09-16 01:48:48,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 585. [2020-09-16 01:48:48,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-09-16 01:48:48,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1403 transitions. [2020-09-16 01:48:48,132 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1403 transitions. Word has length 35 [2020-09-16 01:48:48,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:48:48,132 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 1403 transitions. [2020-09-16 01:48:48,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 01:48:48,132 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1403 transitions. [2020-09-16 01:48:48,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-16 01:48:48,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:48:48,135 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:48:48,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:48:48,349 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:48:48,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:48:48,349 INFO L82 PathProgramCache]: Analyzing trace with hash 915971432, now seen corresponding path program 6 times [2020-09-16 01:48:48,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:48:48,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160921673] [2020-09-16 01:48:48,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:48:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:48:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:48:48,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160921673] [2020-09-16 01:48:48,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680361945] [2020-09-16 01:48:48,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 01:48:48,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-16 01:48:48,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:48:48,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 01:48:48,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:48:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:48:48,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:48:48,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-09-16 01:48:48,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1022857004] [2020-09-16 01:48:48,738 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:48:48,743 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:48:48,767 INFO L274 McrAutomatonBuilder]: Finished intersection with 130 states and 239 transitions. [2020-09-16 01:48:48,767 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:48:48,976 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:48:48,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 01:48:48,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:48:48,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 01:48:48,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-09-16 01:48:48,977 INFO L87 Difference]: Start difference. First operand 585 states and 1403 transitions. Second operand 23 states. [2020-09-16 01:48:49,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:48:49,703 INFO L93 Difference]: Finished difference Result 1731 states and 4053 transitions. [2020-09-16 01:48:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 01:48:49,704 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-09-16 01:48:49,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:48:49,709 INFO L225 Difference]: With dead ends: 1731 [2020-09-16 01:48:49,709 INFO L226 Difference]: Without dead ends: 816 [2020-09-16 01:48:49,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 239 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=566, Invalid=1414, Unknown=0, NotChecked=0, Total=1980 [2020-09-16 01:48:49,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2020-09-16 01:48:49,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 569. [2020-09-16 01:48:49,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-09-16 01:48:49,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1355 transitions. [2020-09-16 01:48:49,726 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1355 transitions. Word has length 35 [2020-09-16 01:48:49,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:48:49,726 INFO L479 AbstractCegarLoop]: Abstraction has 569 states and 1355 transitions. [2020-09-16 01:48:49,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 01:48:49,727 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1355 transitions. [2020-09-16 01:48:49,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-16 01:48:49,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:48:49,728 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:48:49,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:48:49,936 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:48:49,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:48:49,936 INFO L82 PathProgramCache]: Analyzing trace with hash -570341976, now seen corresponding path program 7 times [2020-09-16 01:48:49,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:48:49,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695265186] [2020-09-16 01:48:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:48:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:48:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:48:50,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695265186] [2020-09-16 01:48:50,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211527101] [2020-09-16 01:48:50,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 01:48:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:48:50,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 01:48:50,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:48:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:48:50,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:48:50,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-09-16 01:48:50,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1218519656] [2020-09-16 01:48:50,388 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:48:50,392 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:48:50,413 INFO L274 McrAutomatonBuilder]: Finished intersection with 118 states and 206 transitions. [2020-09-16 01:48:50,414 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:48:50,578 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:48:50,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 01:48:50,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:48:50,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 01:48:50,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-09-16 01:48:50,579 INFO L87 Difference]: Start difference. First operand 569 states and 1355 transitions. Second operand 23 states. [2020-09-16 01:48:51,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:48:51,401 INFO L93 Difference]: Finished difference Result 2131 states and 4974 transitions. [2020-09-16 01:48:51,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-16 01:48:51,403 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-09-16 01:48:51,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:48:51,408 INFO L225 Difference]: With dead ends: 2131 [2020-09-16 01:48:51,408 INFO L226 Difference]: Without dead ends: 792 [2020-09-16 01:48:51,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 215 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=558, Invalid=1422, Unknown=0, NotChecked=0, Total=1980 [2020-09-16 01:48:51,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2020-09-16 01:48:51,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 553. [2020-09-16 01:48:51,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-09-16 01:48:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1307 transitions. [2020-09-16 01:48:51,428 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1307 transitions. Word has length 35 [2020-09-16 01:48:51,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:48:51,429 INFO L479 AbstractCegarLoop]: Abstraction has 553 states and 1307 transitions. [2020-09-16 01:48:51,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 01:48:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1307 transitions. [2020-09-16 01:48:51,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-16 01:48:51,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:48:51,432 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:48:51,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-09-16 01:48:51,647 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:48:51,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:48:51,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1306582504, now seen corresponding path program 8 times [2020-09-16 01:48:51,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:48:51,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402126706] [2020-09-16 01:48:51,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:48:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:48:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:48:51,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402126706] [2020-09-16 01:48:51,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532513480] [2020-09-16 01:48:51,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 01:48:51,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 01:48:51,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:48:51,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 01:48:51,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:48:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:48:52,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:48:52,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-09-16 01:48:52,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [908003226] [2020-09-16 01:48:52,015 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:48:52,019 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:48:52,038 INFO L274 McrAutomatonBuilder]: Finished intersection with 124 states and 218 transitions. [2020-09-16 01:48:52,038 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:48:52,200 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:48:52,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 01:48:52,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:48:52,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 01:48:52,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-09-16 01:48:52,202 INFO L87 Difference]: Start difference. First operand 553 states and 1307 transitions. Second operand 23 states. [2020-09-16 01:48:53,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:48:53,008 INFO L93 Difference]: Finished difference Result 2670 states and 6229 transitions. [2020-09-16 01:48:53,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-16 01:48:53,008 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-09-16 01:48:53,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:48:53,013 INFO L225 Difference]: With dead ends: 2670 [2020-09-16 01:48:53,013 INFO L226 Difference]: Without dead ends: 768 [2020-09-16 01:48:53,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 228 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=588, Invalid=1482, Unknown=0, NotChecked=0, Total=2070 [2020-09-16 01:48:53,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-09-16 01:48:53,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 537. [2020-09-16 01:48:53,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2020-09-16 01:48:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1259 transitions. [2020-09-16 01:48:53,028 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1259 transitions. Word has length 35 [2020-09-16 01:48:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:48:53,028 INFO L479 AbstractCegarLoop]: Abstraction has 537 states and 1259 transitions. [2020-09-16 01:48:53,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 01:48:53,028 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1259 transitions. [2020-09-16 01:48:53,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-16 01:48:53,030 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:48:53,030 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:48:53,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:48:53,246 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:48:53,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:48:53,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1144743464, now seen corresponding path program 9 times [2020-09-16 01:48:53,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:48:53,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704416697] [2020-09-16 01:48:53,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:48:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:48:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:48:53,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704416697] [2020-09-16 01:48:53,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785445052] [2020-09-16 01:48:53,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 01:48:53,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-16 01:48:53,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:48:53,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 01:48:53,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:48:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:48:53,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:48:53,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-09-16 01:48:53,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1493541977] [2020-09-16 01:48:53,591 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:48:53,596 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:48:53,618 INFO L274 McrAutomatonBuilder]: Finished intersection with 130 states and 230 transitions. [2020-09-16 01:48:53,619 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:48:53,822 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:48:53,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 01:48:53,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:48:53,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 01:48:53,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-09-16 01:48:53,823 INFO L87 Difference]: Start difference. First operand 537 states and 1259 transitions. Second operand 23 states. [2020-09-16 01:48:54,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:48:54,921 INFO L93 Difference]: Finished difference Result 3250 states and 7573 transitions. [2020-09-16 01:48:54,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-16 01:48:54,922 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-09-16 01:48:54,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:48:54,934 INFO L225 Difference]: With dead ends: 3250 [2020-09-16 01:48:54,934 INFO L226 Difference]: Without dead ends: 2437 [2020-09-16 01:48:54,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 252 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2020-09-16 01:48:54,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2020-09-16 01:48:54,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 1276. [2020-09-16 01:48:54,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1276 states. [2020-09-16 01:48:54,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 3101 transitions. [2020-09-16 01:48:54,976 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 3101 transitions. Word has length 35 [2020-09-16 01:48:54,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:48:54,977 INFO L479 AbstractCegarLoop]: Abstraction has 1276 states and 3101 transitions. [2020-09-16 01:48:54,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 01:48:54,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 3101 transitions. [2020-09-16 01:48:54,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-16 01:48:54,980 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:48:54,980 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:48:55,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:48:55,197 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:48:55,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:48:55,198 INFO L82 PathProgramCache]: Analyzing trace with hash 909108414, now seen corresponding path program 10 times [2020-09-16 01:48:55,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:48:55,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44650913] [2020-09-16 01:48:55,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:48:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:48:55,417 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:48:55,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44650913] [2020-09-16 01:48:55,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915456779] [2020-09-16 01:48:55,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 01:48:55,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 01:48:55,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:48:55,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-16 01:48:55,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:48:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:48:55,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:48:55,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-09-16 01:48:55,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [319410771] [2020-09-16 01:48:55,524 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:48:55,529 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:48:55,548 INFO L274 McrAutomatonBuilder]: Finished intersection with 102 states and 172 transitions. [2020-09-16 01:48:55,549 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:48:55,667 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:48:55,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 01:48:55,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:48:55,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 01:48:55,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-09-16 01:48:55,668 INFO L87 Difference]: Start difference. First operand 1276 states and 3101 transitions. Second operand 21 states. [2020-09-16 01:48:56,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:48:56,594 INFO L93 Difference]: Finished difference Result 2721 states and 6420 transitions. [2020-09-16 01:48:56,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 01:48:56,599 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-09-16 01:48:56,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:48:56,612 INFO L225 Difference]: With dead ends: 2721 [2020-09-16 01:48:56,612 INFO L226 Difference]: Without dead ends: 2040 [2020-09-16 01:48:56,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 191 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=690, Invalid=1860, Unknown=0, NotChecked=0, Total=2550 [2020-09-16 01:48:56,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2020-09-16 01:48:56,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1192. [2020-09-16 01:48:56,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2020-09-16 01:48:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 2873 transitions. [2020-09-16 01:48:56,649 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 2873 transitions. Word has length 35 [2020-09-16 01:48:56,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:48:56,649 INFO L479 AbstractCegarLoop]: Abstraction has 1192 states and 2873 transitions. [2020-09-16 01:48:56,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 01:48:56,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 2873 transitions. [2020-09-16 01:48:56,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-16 01:48:56,652 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:48:56,652 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:48:56,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-09-16 01:48:56,866 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:48:56,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:48:56,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1383117118, now seen corresponding path program 11 times [2020-09-16 01:48:56,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:48:56,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726708854] [2020-09-16 01:48:56,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:48:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:48:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-16 01:48:57,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726708854] [2020-09-16 01:48:57,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726799126] [2020-09-16 01:48:57,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 01:48:57,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-16 01:48:57,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:48:57,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-16 01:48:57,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:48:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-16 01:48:57,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:48:57,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-09-16 01:48:57,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1381634349] [2020-09-16 01:48:57,156 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:48:57,162 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:48:57,183 INFO L274 McrAutomatonBuilder]: Finished intersection with 102 states and 170 transitions. [2020-09-16 01:48:57,184 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:48:57,290 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:48:57,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 01:48:57,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:48:57,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 01:48:57,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-16 01:48:57,291 INFO L87 Difference]: Start difference. First operand 1192 states and 2873 transitions. Second operand 19 states. [2020-09-16 01:48:58,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:48:58,020 INFO L93 Difference]: Finished difference Result 2550 states and 5976 transitions. [2020-09-16 01:48:58,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 01:48:58,020 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-09-16 01:48:58,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:48:58,030 INFO L225 Difference]: With dead ends: 2550 [2020-09-16 01:48:58,030 INFO L226 Difference]: Without dead ends: 1781 [2020-09-16 01:48:58,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 186 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=511, Invalid=1381, Unknown=0, NotChecked=0, Total=1892 [2020-09-16 01:48:58,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2020-09-16 01:48:58,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1058. [2020-09-16 01:48:58,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1058 states. [2020-09-16 01:48:58,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 2526 transitions. [2020-09-16 01:48:58,088 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 2526 transitions. Word has length 35 [2020-09-16 01:48:58,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:48:58,088 INFO L479 AbstractCegarLoop]: Abstraction has 1058 states and 2526 transitions. [2020-09-16 01:48:58,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 01:48:58,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 2526 transitions. [2020-09-16 01:48:58,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-16 01:48:58,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:48:58,092 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:48:58,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-16 01:48:58,305 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:48:58,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:48:58,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1638948286, now seen corresponding path program 12 times [2020-09-16 01:48:58,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:48:58,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959552082] [2020-09-16 01:48:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:48:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:48:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-16 01:48:58,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959552082] [2020-09-16 01:48:58,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290481582] [2020-09-16 01:48:58,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 01:48:58,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-16 01:48:58,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:48:58,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 01:48:58,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:48:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-16 01:48:58,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:48:58,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-09-16 01:48:58,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1152667575] [2020-09-16 01:48:58,530 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:48:58,535 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:48:58,553 INFO L274 McrAutomatonBuilder]: Finished intersection with 102 states and 168 transitions. [2020-09-16 01:48:58,554 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:48:58,663 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:48:58,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 01:48:58,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:48:58,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 01:48:58,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-16 01:48:58,664 INFO L87 Difference]: Start difference. First operand 1058 states and 2526 transitions. Second operand 17 states. [2020-09-16 01:48:59,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:48:59,271 INFO L93 Difference]: Finished difference Result 2371 states and 5518 transitions. [2020-09-16 01:48:59,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 01:48:59,272 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-09-16 01:48:59,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:48:59,279 INFO L225 Difference]: With dead ends: 2371 [2020-09-16 01:48:59,279 INFO L226 Difference]: Without dead ends: 1444 [2020-09-16 01:48:59,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 181 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2020-09-16 01:48:59,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2020-09-16 01:48:59,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 874. [2020-09-16 01:48:59,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2020-09-16 01:48:59,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2060 transitions. [2020-09-16 01:48:59,303 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2060 transitions. Word has length 35 [2020-09-16 01:48:59,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:48:59,303 INFO L479 AbstractCegarLoop]: Abstraction has 874 states and 2060 transitions. [2020-09-16 01:48:59,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 01:48:59,303 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2060 transitions. [2020-09-16 01:48:59,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-16 01:48:59,305 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:48:59,306 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:48:59,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-16 01:48:59,521 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:48:59,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:48:59,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1615402434, now seen corresponding path program 13 times [2020-09-16 01:48:59,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:48:59,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912245108] [2020-09-16 01:48:59,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:48:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:48:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-16 01:48:59,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912245108] [2020-09-16 01:48:59,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763303280] [2020-09-16 01:48:59,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 01:48:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:48:59,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 01:48:59,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:48:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-16 01:48:59,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:48:59,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-09-16 01:48:59,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [877567041] [2020-09-16 01:48:59,715 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:48:59,720 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:48:59,738 INFO L274 McrAutomatonBuilder]: Finished intersection with 102 states and 166 transitions. [2020-09-16 01:48:59,739 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:48:59,863 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:48:59,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 01:48:59,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:48:59,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 01:48:59,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-16 01:48:59,864 INFO L87 Difference]: Start difference. First operand 874 states and 2060 transitions. Second operand 15 states. [2020-09-16 01:49:00,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:49:00,332 INFO L93 Difference]: Finished difference Result 1669 states and 3808 transitions. [2020-09-16 01:49:00,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 01:49:00,339 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-09-16 01:49:00,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:49:00,343 INFO L225 Difference]: With dead ends: 1669 [2020-09-16 01:49:00,343 INFO L226 Difference]: Without dead ends: 744 [2020-09-16 01:49:00,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 176 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2020-09-16 01:49:00,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-09-16 01:49:00,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 521. [2020-09-16 01:49:00,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-09-16 01:49:00,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1211 transitions. [2020-09-16 01:49:00,364 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1211 transitions. Word has length 35 [2020-09-16 01:49:00,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:49:00,364 INFO L479 AbstractCegarLoop]: Abstraction has 521 states and 1211 transitions. [2020-09-16 01:49:00,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 01:49:00,364 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1211 transitions. [2020-09-16 01:49:00,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-16 01:49:00,367 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:49:00,367 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:49:00,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:49:00,581 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:49:00,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:49:00,582 INFO L82 PathProgramCache]: Analyzing trace with hash 236248680, now seen corresponding path program 14 times [2020-09-16 01:49:00,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:49:00,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131103764] [2020-09-16 01:49:00,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:49:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:49:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:49:00,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131103764] [2020-09-16 01:49:00,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347610883] [2020-09-16 01:49:00,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 01:49:00,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 01:49:00,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:49:00,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 01:49:00,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:49:00,941 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:49:00,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:49:00,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-09-16 01:49:00,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [492755389] [2020-09-16 01:49:00,942 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:49:00,949 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:49:00,979 INFO L274 McrAutomatonBuilder]: Finished intersection with 140 states and 251 transitions. [2020-09-16 01:49:00,980 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:49:01,185 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:49:01,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 01:49:01,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:49:01,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 01:49:01,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-09-16 01:49:01,187 INFO L87 Difference]: Start difference. First operand 521 states and 1211 transitions. Second operand 23 states. [2020-09-16 01:49:01,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:49:01,945 INFO L93 Difference]: Finished difference Result 1734 states and 4025 transitions. [2020-09-16 01:49:01,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 01:49:01,946 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-09-16 01:49:01,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:49:01,951 INFO L225 Difference]: With dead ends: 1734 [2020-09-16 01:49:01,951 INFO L226 Difference]: Without dead ends: 894 [2020-09-16 01:49:01,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=544, Invalid=1348, Unknown=0, NotChecked=0, Total=1892 [2020-09-16 01:49:01,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2020-09-16 01:49:01,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 582. [2020-09-16 01:49:01,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2020-09-16 01:49:01,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1364 transitions. [2020-09-16 01:49:01,968 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1364 transitions. Word has length 35 [2020-09-16 01:49:01,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:49:01,968 INFO L479 AbstractCegarLoop]: Abstraction has 582 states and 1364 transitions. [2020-09-16 01:49:01,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 01:49:01,969 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1364 transitions. [2020-09-16 01:49:01,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-16 01:49:01,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:49:01,970 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:49:02,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-16 01:49:02,184 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:49:02,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:49:02,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1268277900, now seen corresponding path program 15 times [2020-09-16 01:49:02,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:49:02,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898912708] [2020-09-16 01:49:02,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:49:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:49:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:49:02,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898912708] [2020-09-16 01:49:02,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898245883] [2020-09-16 01:49:02,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 01:49:02,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-16 01:49:02,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:49:02,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 01:49:02,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:49:02,527 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:49:02,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:49:02,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-09-16 01:49:02,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2050251933] [2020-09-16 01:49:02,531 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:49:02,536 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:49:02,554 INFO L274 McrAutomatonBuilder]: Finished intersection with 95 states and 159 transitions. [2020-09-16 01:49:02,554 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:49:02,672 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:49:02,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 01:49:02,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:49:02,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 01:49:02,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-09-16 01:49:02,675 INFO L87 Difference]: Start difference. First operand 582 states and 1364 transitions. Second operand 23 states. [2020-09-16 01:49:03,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:49:03,473 INFO L93 Difference]: Finished difference Result 1717 states and 3982 transitions. [2020-09-16 01:49:03,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-16 01:49:03,473 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-09-16 01:49:03,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:49:03,479 INFO L225 Difference]: With dead ends: 1717 [2020-09-16 01:49:03,480 INFO L226 Difference]: Without dead ends: 774 [2020-09-16 01:49:03,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=538, Invalid=1354, Unknown=0, NotChecked=0, Total=1892 [2020-09-16 01:49:03,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2020-09-16 01:49:03,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 538. [2020-09-16 01:49:03,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2020-09-16 01:49:03,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1256 transitions. [2020-09-16 01:49:03,501 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1256 transitions. Word has length 35 [2020-09-16 01:49:03,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:49:03,501 INFO L479 AbstractCegarLoop]: Abstraction has 538 states and 1256 transitions. [2020-09-16 01:49:03,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 01:49:03,501 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1256 transitions. [2020-09-16 01:49:03,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-16 01:49:03,503 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:49:03,503 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:49:03,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-16 01:49:03,718 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:49:03,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:49:03,719 INFO L82 PathProgramCache]: Analyzing trace with hash -905226112, now seen corresponding path program 16 times [2020-09-16 01:49:03,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:49:03,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420770948] [2020-09-16 01:49:03,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:49:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:49:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:49:03,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420770948] [2020-09-16 01:49:03,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735785577] [2020-09-16 01:49:03,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 01:49:04,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 01:49:04,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:49:04,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 01:49:04,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:49:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:49:04,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:49:04,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-09-16 01:49:04,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1405934649] [2020-09-16 01:49:04,052 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:49:04,058 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:49:04,074 INFO L274 McrAutomatonBuilder]: Finished intersection with 95 states and 161 transitions. [2020-09-16 01:49:04,075 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:49:04,164 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:49:04,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 01:49:04,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:49:04,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 01:49:04,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-09-16 01:49:04,165 INFO L87 Difference]: Start difference. First operand 538 states and 1256 transitions. Second operand 23 states. [2020-09-16 01:49:04,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:49:04,926 INFO L93 Difference]: Finished difference Result 2063 states and 4783 transitions. [2020-09-16 01:49:04,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-16 01:49:04,927 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-09-16 01:49:04,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:49:04,931 INFO L225 Difference]: With dead ends: 2063 [2020-09-16 01:49:04,931 INFO L226 Difference]: Without dead ends: 716 [2020-09-16 01:49:04,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=569, Invalid=1411, Unknown=0, NotChecked=0, Total=1980 [2020-09-16 01:49:04,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2020-09-16 01:49:04,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 494. [2020-09-16 01:49:04,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-09-16 01:49:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1148 transitions. [2020-09-16 01:49:04,943 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1148 transitions. Word has length 35 [2020-09-16 01:49:04,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:49:04,943 INFO L479 AbstractCegarLoop]: Abstraction has 494 states and 1148 transitions. [2020-09-16 01:49:04,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 01:49:04,944 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1148 transitions. [2020-09-16 01:49:04,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-16 01:49:04,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:49:04,945 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:49:05,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-16 01:49:05,159 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:49:05,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:49:05,159 INFO L82 PathProgramCache]: Analyzing trace with hash 95191180, now seen corresponding path program 17 times [2020-09-16 01:49:05,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:49:05,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822629799] [2020-09-16 01:49:05,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:49:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:49:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:49:05,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822629799] [2020-09-16 01:49:05,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75804597] [2020-09-16 01:49:05,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 01:49:05,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-16 01:49:05,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:49:05,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 01:49:05,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:49:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:49:05,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:49:05,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-09-16 01:49:05,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [925759795] [2020-09-16 01:49:05,504 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:49:05,512 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:49:05,532 INFO L274 McrAutomatonBuilder]: Finished intersection with 95 states and 163 transitions. [2020-09-16 01:49:05,533 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:49:05,635 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:49:05,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 01:49:05,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:49:05,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 01:49:05,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-09-16 01:49:05,637 INFO L87 Difference]: Start difference. First operand 494 states and 1148 transitions. Second operand 23 states. [2020-09-16 01:49:06,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:49:06,401 INFO L93 Difference]: Finished difference Result 2541 states and 5902 transitions. [2020-09-16 01:49:06,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-16 01:49:06,401 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-09-16 01:49:06,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:49:06,405 INFO L225 Difference]: With dead ends: 2541 [2020-09-16 01:49:06,406 INFO L226 Difference]: Without dead ends: 658 [2020-09-16 01:49:06,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-09-16 01:49:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-09-16 01:49:06,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 450. [2020-09-16 01:49:06,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-09-16 01:49:06,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1040 transitions. [2020-09-16 01:49:06,423 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1040 transitions. Word has length 35 [2020-09-16 01:49:06,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:49:06,423 INFO L479 AbstractCegarLoop]: Abstraction has 450 states and 1040 transitions. [2020-09-16 01:49:06,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 01:49:06,423 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1040 transitions. [2020-09-16 01:49:06,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-16 01:49:06,426 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:49:06,427 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:49:06,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:49:06,642 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:49:06,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:49:06,643 INFO L82 PathProgramCache]: Analyzing trace with hash -576465512, now seen corresponding path program 18 times [2020-09-16 01:49:06,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:49:06,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528422640] [2020-09-16 01:49:06,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:49:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:49:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:49:06,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528422640] [2020-09-16 01:49:06,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100626710] [2020-09-16 01:49:06,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 01:49:07,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-16 01:49:07,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:49:07,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 01:49:07,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:49:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:49:07,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:49:07,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-09-16 01:49:07,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2101657068] [2020-09-16 01:49:07,134 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:49:07,143 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:49:07,166 INFO L274 McrAutomatonBuilder]: Finished intersection with 95 states and 165 transitions. [2020-09-16 01:49:07,166 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:49:07,269 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:49:07,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 01:49:07,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:49:07,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 01:49:07,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-09-16 01:49:07,271 INFO L87 Difference]: Start difference. First operand 450 states and 1040 transitions. Second operand 23 states. [2020-09-16 01:49:08,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:49:08,219 INFO L93 Difference]: Finished difference Result 2473 states and 5749 transitions. [2020-09-16 01:49:08,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-16 01:49:08,220 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-09-16 01:49:08,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:49:08,228 INFO L225 Difference]: With dead ends: 2473 [2020-09-16 01:49:08,228 INFO L226 Difference]: Without dead ends: 1507 [2020-09-16 01:49:08,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=823, Invalid=2257, Unknown=0, NotChecked=0, Total=3080 [2020-09-16 01:49:08,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2020-09-16 01:49:08,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 771. [2020-09-16 01:49:08,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 771 states. [2020-09-16 01:49:08,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1835 transitions. [2020-09-16 01:49:08,253 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1835 transitions. Word has length 35 [2020-09-16 01:49:08,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:49:08,253 INFO L479 AbstractCegarLoop]: Abstraction has 771 states and 1835 transitions. [2020-09-16 01:49:08,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 01:49:08,254 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1835 transitions. [2020-09-16 01:49:08,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-16 01:49:08,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:49:08,256 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:49:08,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:49:08,470 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:49:08,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:49:08,471 INFO L82 PathProgramCache]: Analyzing trace with hash -365571194, now seen corresponding path program 19 times [2020-09-16 01:49:08,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:49:08,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363984758] [2020-09-16 01:49:08,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:49:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:49:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:49:08,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363984758] [2020-09-16 01:49:08,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946446307] [2020-09-16 01:49:08,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 01:49:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:49:08,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-16 01:49:08,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:49:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:49:08,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:49:08,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-09-16 01:49:08,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [783104707] [2020-09-16 01:49:08,786 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:49:08,791 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:49:08,810 INFO L274 McrAutomatonBuilder]: Finished intersection with 114 states and 198 transitions. [2020-09-16 01:49:08,810 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:49:08,959 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:49:08,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 01:49:08,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:49:08,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 01:49:08,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-09-16 01:49:08,960 INFO L87 Difference]: Start difference. First operand 771 states and 1835 transitions. Second operand 21 states. [2020-09-16 01:49:09,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:49:09,731 INFO L93 Difference]: Finished difference Result 1951 states and 4562 transitions. [2020-09-16 01:49:09,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-16 01:49:09,732 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-09-16 01:49:09,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:49:09,737 INFO L225 Difference]: With dead ends: 1951 [2020-09-16 01:49:09,742 INFO L226 Difference]: Without dead ends: 1081 [2020-09-16 01:49:09,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=628, Invalid=1724, Unknown=0, NotChecked=0, Total=2352 [2020-09-16 01:49:09,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2020-09-16 01:49:09,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 637. [2020-09-16 01:49:09,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2020-09-16 01:49:09,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1488 transitions. [2020-09-16 01:49:09,764 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1488 transitions. Word has length 35 [2020-09-16 01:49:09,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:49:09,764 INFO L479 AbstractCegarLoop]: Abstraction has 637 states and 1488 transitions. [2020-09-16 01:49:09,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 01:49:09,765 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1488 transitions. [2020-09-16 01:49:09,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-16 01:49:09,766 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:49:09,766 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:49:09,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-16 01:49:09,981 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:49:09,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:49:09,981 INFO L82 PathProgramCache]: Analyzing trace with hash 2092017522, now seen corresponding path program 20 times [2020-09-16 01:49:09,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:49:09,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390321460] [2020-09-16 01:49:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:49:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:49:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:49:10,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390321460] [2020-09-16 01:49:10,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622046731] [2020-09-16 01:49:10,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 01:49:10,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 01:49:10,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:49:10,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-16 01:49:10,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:49:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:49:10,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:49:10,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-09-16 01:49:10,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [221053150] [2020-09-16 01:49:10,281 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:49:10,286 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:49:10,309 INFO L274 McrAutomatonBuilder]: Finished intersection with 139 states and 240 transitions. [2020-09-16 01:49:10,310 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:49:10,504 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:49:10,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 01:49:10,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:49:10,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 01:49:10,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-09-16 01:49:10,505 INFO L87 Difference]: Start difference. First operand 637 states and 1488 transitions. Second operand 19 states. [2020-09-16 01:49:11,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:49:11,123 INFO L93 Difference]: Finished difference Result 1790 states and 4143 transitions. [2020-09-16 01:49:11,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 01:49:11,124 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-09-16 01:49:11,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:49:11,127 INFO L225 Difference]: With dead ends: 1790 [2020-09-16 01:49:11,128 INFO L226 Difference]: Without dead ends: 744 [2020-09-16 01:49:11,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2020-09-16 01:49:11,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-09-16 01:49:11,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 453. [2020-09-16 01:49:11,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-09-16 01:49:11,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1022 transitions. [2020-09-16 01:49:11,148 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1022 transitions. Word has length 35 [2020-09-16 01:49:11,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:49:11,148 INFO L479 AbstractCegarLoop]: Abstraction has 453 states and 1022 transitions. [2020-09-16 01:49:11,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 01:49:11,149 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1022 transitions. [2020-09-16 01:49:11,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-16 01:49:11,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:49:11,150 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:49:11,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-16 01:49:11,365 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-09-16 01:49:11,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:49:11,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1602760798, now seen corresponding path program 21 times [2020-09-16 01:49:11,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:49:11,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750303881] [2020-09-16 01:49:11,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:49:11,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:49:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-16 01:49:11,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750303881] [2020-09-16 01:49:11,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981548019] [2020-09-16 01:49:11,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 01:49:11,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-16 01:49:11,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 01:49:11,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 01:49:11,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:49:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 34 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-16 01:49:11,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:49:11,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-09-16 01:49:11,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1765379382] [2020-09-16 01:49:11,597 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:49:11,601 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:49:11,623 INFO L274 McrAutomatonBuilder]: Finished intersection with 164 states and 282 transitions. [2020-09-16 01:49:11,623 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:49:11,860 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:49:11,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 01:49:11,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:49:11,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 01:49:11,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-16 01:49:11,861 INFO L87 Difference]: Start difference. First operand 453 states and 1022 transitions. Second operand 17 states. [2020-09-16 01:49:12,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:49:12,290 INFO L93 Difference]: Finished difference Result 1084 states and 2413 transitions. [2020-09-16 01:49:12,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 01:49:12,290 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-09-16 01:49:12,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:49:12,291 INFO L225 Difference]: With dead ends: 1084 [2020-09-16 01:49:12,291 INFO L226 Difference]: Without dead ends: 0 [2020-09-16 01:49:12,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 305 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=868, Unknown=0, NotChecked=0, Total=1190 [2020-09-16 01:49:12,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-16 01:49:12,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-16 01:49:12,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-16 01:49:12,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-16 01:49:12,292 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-09-16 01:49:12,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:49:12,292 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-16 01:49:12,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 01:49:12,292 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-16 01:49:12,293 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-16 01:49:12,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:49:12,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 01:49:12 BasicIcfg [2020-09-16 01:49:12,499 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-16 01:49:12,502 INFO L168 Benchmark]: Toolchain (without parser) took 32629.44 ms. Allocated memory was 139.5 MB in the beginning and 523.8 MB in the end (delta: 384.3 MB). Free memory was 101.1 MB in the beginning and 476.9 MB in the end (delta: -375.8 MB). Peak memory consumption was 8.5 MB. Max. memory is 7.1 GB. [2020-09-16 01:49:12,503 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-16 01:49:12,504 INFO L168 Benchmark]: CACSL2BoogieTranslator took 413.33 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 100.5 MB in the beginning and 181.4 MB in the end (delta: -81.0 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. [2020-09-16 01:49:12,504 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.12 ms. Allocated memory is still 202.9 MB. Free memory was 181.4 MB in the beginning and 179.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-16 01:49:12,505 INFO L168 Benchmark]: Boogie Preprocessor took 33.92 ms. Allocated memory is still 202.9 MB. Free memory was 179.4 MB in the beginning and 177.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-09-16 01:49:12,505 INFO L168 Benchmark]: RCFGBuilder took 361.80 ms. Allocated memory is still 202.9 MB. Free memory was 177.7 MB in the beginning and 161.4 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. [2020-09-16 01:49:12,506 INFO L168 Benchmark]: TraceAbstraction took 31760.73 ms. Allocated memory was 202.9 MB in the beginning and 523.8 MB in the end (delta: 320.9 MB). Free memory was 160.7 MB in the beginning and 476.9 MB in the end (delta: -316.2 MB). Peak memory consumption was 4.7 MB. Max. memory is 7.1 GB. [2020-09-16 01:49:12,508 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 413.33 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 100.5 MB in the beginning and 181.4 MB in the end (delta: -81.0 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.12 ms. Allocated memory is still 202.9 MB. Free memory was 181.4 MB in the beginning and 179.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.92 ms. Allocated memory is still 202.9 MB. Free memory was 179.4 MB in the beginning and 177.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 361.80 ms. Allocated memory is still 202.9 MB. Free memory was 177.7 MB in the beginning and 161.4 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 31760.73 ms. Allocated memory was 202.9 MB in the beginning and 523.8 MB in the end (delta: 320.9 MB). Free memory was 160.7 MB in the beginning and 476.9 MB in the end (delta: -316.2 MB). Peak memory consumption was 4.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 0.9s, 57 ProgramPointsBefore, 27 ProgramPointsAfterwards, 56 TransitionsBefore, 24 TransitionsAfterwards, 528 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 12 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 2 ChoiceCompositions, 235 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 426 CheckedPairsTotal, 32 TotalNumberOfCompositions - 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: 31.5s, OverallIterations: 23, TraceHistogramMax: 5, AutomataDifference: 13.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.9s, HoareTripleCheckerStatistics: 1839 SDtfs, 8174 SDslu, 9168 SDs, 0 SdLazy, 5708 SolverSat, 1086 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4975 GetRequests, 4003 SyntacticMatches, 197 SemanticMatches, 775 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6919 ImplicationChecksByTransitivity, 11.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1276occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 23 MinimizatonAttempts, 7086 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 1471 NumberOfCodeBlocks, 1465 NumberOfCodeBlocksAsserted, 109 NumberOfCheckSat, 1426 ConstructedInterpolants, 0 QuantifiedInterpolants, 134556 SizeOfPredicates, 281 NumberOfNonLiveVariables, 2340 ConjunctsInSsa, 330 ConjunctsInUnsatCore, 45 InterpolantComputations, 3 PerfectInterpolantSequences, 1409/1926 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...