/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.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-15 13:08:33,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-15 13:08:33,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-15 13:08:33,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-15 13:08:33,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-15 13:08:33,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-15 13:08:33,619 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-15 13:08:33,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-15 13:08:33,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-15 13:08:33,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-15 13:08:33,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-15 13:08:33,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-15 13:08:33,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-15 13:08:33,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-15 13:08:33,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-15 13:08:33,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-15 13:08:33,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-15 13:08:33,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-15 13:08:33,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-15 13:08:33,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-15 13:08:33,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-15 13:08:33,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-15 13:08:33,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-15 13:08:33,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-15 13:08:33,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-15 13:08:33,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-15 13:08:33,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-15 13:08:33,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-15 13:08:33,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-15 13:08:33,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-15 13:08:33,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-15 13:08:33,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-15 13:08:33,684 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-15 13:08:33,685 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-15 13:08:33,688 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-15 13:08:33,689 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-15 13:08:33,690 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-15 13:08:33,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-15 13:08:33,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-15 13:08:33,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-15 13:08:33,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-15 13:08:33,695 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.epf [2020-09-15 13:08:33,738 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-15 13:08:33,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-15 13:08:33,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-15 13:08:33,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-15 13:08:33,740 INFO L138 SettingsManager]: * Use SBE=true [2020-09-15 13:08:33,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-15 13:08:33,741 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-15 13:08:33,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-15 13:08:33,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-15 13:08:33,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-15 13:08:33,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-15 13:08:33,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-15 13:08:33,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-15 13:08:33,744 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-15 13:08:33,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-15 13:08:33,744 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-15 13:08:33,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-15 13:08:33,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-15 13:08:33,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-15 13:08:33,745 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-15 13:08:33,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-15 13:08:33,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-15 13:08:33,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-15 13:08:33,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-15 13:08:33,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-15 13:08:33,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-15 13:08:33,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-15 13:08:33,747 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-15 13:08:33,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-15 13:08:34,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-15 13:08:34,216 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-15 13:08:34,221 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-15 13:08:34,222 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-15 13:08:34,223 INFO L275 PluginConnector]: CDTParser initialized [2020-09-15 13:08:34,224 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-09-15 13:08:34,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa38a7f26/dbe3fda8936c476891d982c653959a05/FLAGdfb11a732 [2020-09-15 13:08:34,988 INFO L306 CDTParser]: Found 1 translation units. [2020-09-15 13:08:34,988 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-09-15 13:08:35,015 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa38a7f26/dbe3fda8936c476891d982c653959a05/FLAGdfb11a732 [2020-09-15 13:08:35,217 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fa38a7f26/dbe3fda8936c476891d982c653959a05 [2020-09-15 13:08:35,229 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-15 13:08:35,235 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-15 13:08:35,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-15 13:08:35,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-15 13:08:35,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-15 13:08:35,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:08:35" (1/1) ... [2020-09-15 13:08:35,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3824765c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:35, skipping insertion in model container [2020-09-15 13:08:35,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:08:35" (1/1) ... [2020-09-15 13:08:35,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-15 13:08:35,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-15 13:08:36,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 13:08:36,096 INFO L203 MainTranslator]: Completed pre-run [2020-09-15 13:08:36,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 13:08:36,398 INFO L208 MainTranslator]: Completed translation [2020-09-15 13:08:36,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:36 WrapperNode [2020-09-15 13:08:36,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-15 13:08:36,401 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-15 13:08:36,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-15 13:08:36,402 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-15 13:08:36,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:36" (1/1) ... [2020-09-15 13:08:36,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:36" (1/1) ... [2020-09-15 13:08:36,480 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-15 13:08:36,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-15 13:08:36,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-15 13:08:36,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-15 13:08:36,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:36" (1/1) ... [2020-09-15 13:08:36,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:36" (1/1) ... [2020-09-15 13:08:36,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:36" (1/1) ... [2020-09-15 13:08:36,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:36" (1/1) ... [2020-09-15 13:08:36,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:36" (1/1) ... [2020-09-15 13:08:36,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:36" (1/1) ... [2020-09-15 13:08:36,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:36" (1/1) ... [2020-09-15 13:08:36,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-15 13:08:36,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-15 13:08:36,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-15 13:08:36,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-15 13:08:36,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:36" (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 [2020-09-15 13:08:36,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-15 13:08:36,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-15 13:08:36,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-15 13:08:36,607 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2020-09-15 13:08:36,607 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2020-09-15 13:08:36,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-15 13:08:36,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-15 13:08:36,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-15 13:08:36,612 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-15 13:08:37,033 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-15 13:08:37,033 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-15 13:08:37,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:08:37 BoogieIcfgContainer [2020-09-15 13:08:37,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-15 13:08:37,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-15 13:08:37,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-15 13:08:37,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-15 13:08:37,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 01:08:35" (1/3) ... [2020-09-15 13:08:37,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52fc7d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:08:37, skipping insertion in model container [2020-09-15 13:08:37,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:08:36" (2/3) ... [2020-09-15 13:08:37,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52fc7d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:08:37, skipping insertion in model container [2020-09-15 13:08:37,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:08:37" (3/3) ... [2020-09-15 13:08:37,049 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2020-09-15 13:08:37,063 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-15 13:08:37,063 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-15 13:08:37,077 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-15 13:08:37,078 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-15 13:08:37,106 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,107 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,107 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,107 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,108 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,108 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,108 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,108 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,109 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,109 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,109 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,109 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,110 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,110 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,110 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,110 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,111 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,111 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,111 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,111 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,112 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,116 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,116 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,117 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,117 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,117 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,117 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,118 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,118 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 13:08:37,154 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-15 13:08:37,182 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-15 13:08:37,183 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-15 13:08:37,183 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-15 13:08:37,183 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-15 13:08:37,183 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-15 13:08:37,183 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-15 13:08:37,184 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-15 13:08:37,184 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-15 13:08:37,204 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 85 transitions, 178 flow [2020-09-15 13:08:37,206 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 178 flow [2020-09-15 13:08:37,264 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2020-09-15 13:08:37,264 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-15 13:08:37,271 INFO L80 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 84 events. 7/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-09-15 13:08:37,273 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 178 flow [2020-09-15 13:08:37,300 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2020-09-15 13:08:37,301 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-15 13:08:37,302 INFO L80 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 84 events. 7/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-09-15 13:08:37,303 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 640 [2020-09-15 13:08:37,305 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-15 13:08:38,764 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-09-15 13:08:38,993 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-09-15 13:08:39,659 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-09-15 13:08:39,989 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-15 13:08:40,590 WARN L193 SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-09-15 13:08:41,056 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-09-15 13:08:42,561 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 149 DAG size of output: 131 [2020-09-15 13:08:43,283 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-09-15 13:08:43,286 INFO L206 etLargeBlockEncoding]: Checked pairs total: 510 [2020-09-15 13:08:43,286 INFO L214 etLargeBlockEncoding]: Total number of compositions: 78 [2020-09-15 13:08:43,291 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 15 places, 13 transitions, 34 flow [2020-09-15 13:08:43,302 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 17 states. [2020-09-15 13:08:43,305 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-09-15 13:08:43,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-15 13:08:43,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:43,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:43,315 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:43,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:43,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1450466956, now seen corresponding path program 1 times [2020-09-15 13:08:43,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:43,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752470030] [2020-09-15 13:08:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:08:43,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752470030] [2020-09-15 13:08:43,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 13:08:43,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 13:08:43,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810743373] [2020-09-15 13:08:43,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-15 13:08:43,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:43,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-15 13:08:43,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 13:08:43,636 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-09-15 13:08:43,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:43,689 INFO L93 Difference]: Finished difference Result 20 states and 36 transitions. [2020-09-15 13:08:43,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-15 13:08:43,691 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-09-15 13:08:43,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:43,708 INFO L225 Difference]: With dead ends: 20 [2020-09-15 13:08:43,708 INFO L226 Difference]: Without dead ends: 20 [2020-09-15 13:08:43,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-15 13:08:43,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-15 13:08:43,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-15 13:08:43,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-15 13:08:43,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 36 transitions. [2020-09-15 13:08:43,766 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 36 transitions. Word has length 8 [2020-09-15 13:08:43,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:43,766 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 36 transitions. [2020-09-15 13:08:43,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-15 13:08:43,767 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 36 transitions. [2020-09-15 13:08:43,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-15 13:08:43,768 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:43,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:43,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-15 13:08:43,768 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:43,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:43,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1984436175, now seen corresponding path program 1 times [2020-09-15 13:08:43,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:43,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508448522] [2020-09-15 13:08:43,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:08:43,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508448522] [2020-09-15 13:08:43,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274319573] [2020-09-15 13:08:43,922 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 [2020-09-15 13:08:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:44,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-09-15 13:08:44,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-15 13:08:44,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-15 13:08:44,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-09-15 13:08:44,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195195673] [2020-09-15 13:08:44,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-15 13:08:44,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:44,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-15 13:08:44,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:08:44,071 INFO L87 Difference]: Start difference. First operand 20 states and 36 transitions. Second operand 3 states. [2020-09-15 13:08:44,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:44,083 INFO L93 Difference]: Finished difference Result 28 states and 52 transitions. [2020-09-15 13:08:44,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-15 13:08:44,084 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-09-15 13:08:44,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:44,085 INFO L225 Difference]: With dead ends: 28 [2020-09-15 13:08:44,085 INFO L226 Difference]: Without dead ends: 28 [2020-09-15 13:08:44,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 13:08:44,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-15 13:08:44,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-09-15 13:08:44,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-15 13:08:44,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 44 transitions. [2020-09-15 13:08:44,092 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 44 transitions. Word has length 9 [2020-09-15 13:08:44,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:44,092 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 44 transitions. [2020-09-15 13:08:44,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-15 13:08:44,093 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 44 transitions. [2020-09-15 13:08:44,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 13:08:44,093 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:44,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:44,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-15 13:08:44,308 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:44,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:44,309 INFO L82 PathProgramCache]: Analyzing trace with hash -436238306, now seen corresponding path program 1 times [2020-09-15 13:08:44,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:44,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926978398] [2020-09-15 13:08:44,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:44,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:08:44,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926978398] [2020-09-15 13:08:44,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375811200] [2020-09-15 13:08:44,451 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 [2020-09-15 13:08:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:44,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-15 13:08:44,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-15 13:08:44,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:44,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-09-15 13:08:44,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181057259] [2020-09-15 13:08:44,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 13:08:44,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:44,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 13:08:44,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-15 13:08:44,552 INFO L87 Difference]: Start difference. First operand 24 states and 44 transitions. Second operand 6 states. [2020-09-15 13:08:44,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:44,687 INFO L93 Difference]: Finished difference Result 44 states and 84 transitions. [2020-09-15 13:08:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 13:08:44,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-09-15 13:08:44,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:44,689 INFO L225 Difference]: With dead ends: 44 [2020-09-15 13:08:44,689 INFO L226 Difference]: Without dead ends: 44 [2020-09-15 13:08:44,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-09-15 13:08:44,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-15 13:08:44,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-09-15 13:08:44,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-15 13:08:44,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2020-09-15 13:08:44,697 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 11 [2020-09-15 13:08:44,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:44,698 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2020-09-15 13:08:44,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 13:08:44,698 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2020-09-15 13:08:44,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 13:08:44,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:44,699 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:44,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:44,900 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:44,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:44,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1899195462, now seen corresponding path program 2 times [2020-09-15 13:08:44,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:44,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944561896] [2020-09-15 13:08:44,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-15 13:08:44,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944561896] [2020-09-15 13:08:44,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751655572] [2020-09-15 13:08:44,987 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 [2020-09-15 13:08:45,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:08:45,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:45,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-15 13:08:45,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-15 13:08:45,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:45,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-15 13:08:45,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571523108] [2020-09-15 13:08:45,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 13:08:45,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:45,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 13:08:45,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-15 13:08:45,086 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand 6 states. [2020-09-15 13:08:45,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:45,111 INFO L93 Difference]: Finished difference Result 54 states and 104 transitions. [2020-09-15 13:08:45,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-15 13:08:45,112 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-09-15 13:08:45,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:45,114 INFO L225 Difference]: With dead ends: 54 [2020-09-15 13:08:45,114 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 13:08:45,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-15 13:08:45,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 13:08:45,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-09-15 13:08:45,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-15 13:08:45,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 94 transitions. [2020-09-15 13:08:45,123 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 94 transitions. Word has length 14 [2020-09-15 13:08:45,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:45,123 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 94 transitions. [2020-09-15 13:08:45,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 13:08:45,123 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 94 transitions. [2020-09-15 13:08:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-15 13:08:45,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:45,125 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:45,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:45,339 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:45,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:45,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1378033683, now seen corresponding path program 3 times [2020-09-15 13:08:45,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:45,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679078754] [2020-09-15 13:08:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-15 13:08:45,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679078754] [2020-09-15 13:08:45,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547899381] [2020-09-15 13:08:45,484 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 [2020-09-15 13:08:45,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 13:08:45,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:45,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-15 13:08:45,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:08:45,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:45,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-09-15 13:08:45,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481742203] [2020-09-15 13:08:45,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 13:08:45,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:45,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 13:08:45,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-15 13:08:45,642 INFO L87 Difference]: Start difference. First operand 49 states and 94 transitions. Second operand 9 states. [2020-09-15 13:08:45,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:45,965 INFO L93 Difference]: Finished difference Result 76 states and 148 transitions. [2020-09-15 13:08:45,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 13:08:45,966 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-09-15 13:08:45,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:45,967 INFO L225 Difference]: With dead ends: 76 [2020-09-15 13:08:45,967 INFO L226 Difference]: Without dead ends: 76 [2020-09-15 13:08:45,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-09-15 13:08:45,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-15 13:08:45,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-09-15 13:08:45,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-15 13:08:45,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 136 transitions. [2020-09-15 13:08:45,978 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 136 transitions. Word has length 16 [2020-09-15 13:08:45,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:45,978 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 136 transitions. [2020-09-15 13:08:45,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 13:08:45,979 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 136 transitions. [2020-09-15 13:08:45,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-15 13:08:45,980 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:45,980 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:46,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:46,195 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:46,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:46,195 INFO L82 PathProgramCache]: Analyzing trace with hash -115221563, now seen corresponding path program 4 times [2020-09-15 13:08:46,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:46,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820590975] [2020-09-15 13:08:46,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-15 13:08:46,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820590975] [2020-09-15 13:08:46,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690609165] [2020-09-15 13:08:46,295 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 [2020-09-15 13:08:46,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:08:46,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:46,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-15 13:08:46,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-15 13:08:46,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:46,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2020-09-15 13:08:46,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916246426] [2020-09-15 13:08:46,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 13:08:46,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:46,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 13:08:46,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-15 13:08:46,434 INFO L87 Difference]: Start difference. First operand 70 states and 136 transitions. Second operand 11 states. [2020-09-15 13:08:46,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:46,998 INFO L93 Difference]: Finished difference Result 102 states and 200 transitions. [2020-09-15 13:08:46,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 13:08:46,999 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-09-15 13:08:47,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:47,001 INFO L225 Difference]: With dead ends: 102 [2020-09-15 13:08:47,001 INFO L226 Difference]: Without dead ends: 102 [2020-09-15 13:08:47,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2020-09-15 13:08:47,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-15 13:08:47,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2020-09-15 13:08:47,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-15 13:08:47,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 186 transitions. [2020-09-15 13:08:47,014 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 186 transitions. Word has length 19 [2020-09-15 13:08:47,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:47,014 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 186 transitions. [2020-09-15 13:08:47,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 13:08:47,015 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 186 transitions. [2020-09-15 13:08:47,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-15 13:08:47,016 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:47,016 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:47,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-15 13:08:47,226 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:47,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:47,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1553067533, now seen corresponding path program 5 times [2020-09-15 13:08:47,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:47,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274959975] [2020-09-15 13:08:47,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-15 13:08:47,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274959975] [2020-09-15 13:08:47,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144471375] [2020-09-15 13:08:47,343 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 [2020-09-15 13:08:47,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-15 13:08:47,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:47,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-15 13:08:47,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-09-15 13:08:47,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:47,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-09-15 13:08:47,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253044443] [2020-09-15 13:08:47,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 13:08:47,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:47,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 13:08:47,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-15 13:08:47,484 INFO L87 Difference]: Start difference. First operand 95 states and 186 transitions. Second operand 13 states. [2020-09-15 13:08:48,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:48,385 INFO L93 Difference]: Finished difference Result 132 states and 260 transitions. [2020-09-15 13:08:48,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 13:08:48,386 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-09-15 13:08:48,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:48,388 INFO L225 Difference]: With dead ends: 132 [2020-09-15 13:08:48,388 INFO L226 Difference]: Without dead ends: 132 [2020-09-15 13:08:48,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=588, Invalid=1218, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 13:08:48,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-15 13:08:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-09-15 13:08:48,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-15 13:08:48,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 244 transitions. [2020-09-15 13:08:48,401 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 244 transitions. Word has length 22 [2020-09-15 13:08:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:48,401 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 244 transitions. [2020-09-15 13:08:48,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 13:08:48,401 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 244 transitions. [2020-09-15 13:08:48,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-15 13:08:48,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:48,403 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:48,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:48,612 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:48,613 INFO L82 PathProgramCache]: Analyzing trace with hash 390743231, now seen corresponding path program 6 times [2020-09-15 13:08:48,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:48,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105750625] [2020-09-15 13:08:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-15 13:08:48,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105750625] [2020-09-15 13:08:48,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144005850] [2020-09-15 13:08:48,773 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 [2020-09-15 13:08:48,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-15 13:08:48,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:48,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 13:08:48,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-15 13:08:48,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:48,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-09-15 13:08:48,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147251293] [2020-09-15 13:08:48,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 13:08:48,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:48,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 13:08:48,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-15 13:08:48,966 INFO L87 Difference]: Start difference. First operand 124 states and 244 transitions. Second operand 15 states. [2020-09-15 13:08:50,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:50,241 INFO L93 Difference]: Finished difference Result 166 states and 328 transitions. [2020-09-15 13:08:50,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-15 13:08:50,242 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-09-15 13:08:50,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:50,244 INFO L225 Difference]: With dead ends: 166 [2020-09-15 13:08:50,244 INFO L226 Difference]: Without dead ends: 166 [2020-09-15 13:08:50,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1008, Invalid=2184, Unknown=0, NotChecked=0, Total=3192 [2020-09-15 13:08:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-15 13:08:50,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 157. [2020-09-15 13:08:50,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-15 13:08:50,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 310 transitions. [2020-09-15 13:08:50,258 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 310 transitions. Word has length 25 [2020-09-15 13:08:50,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:50,258 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 310 transitions. [2020-09-15 13:08:50,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 13:08:50,259 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 310 transitions. [2020-09-15 13:08:50,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-15 13:08:50,261 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:50,261 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:50,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:50,476 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:50,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:50,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1155941881, now seen corresponding path program 7 times [2020-09-15 13:08:50,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:50,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380961119] [2020-09-15 13:08:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-15 13:08:50,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380961119] [2020-09-15 13:08:50,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377918805] [2020-09-15 13:08:50,610 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 [2020-09-15 13:08:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:50,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 13:08:50,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-15 13:08:50,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:50,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-15 13:08:50,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471302118] [2020-09-15 13:08:50,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 13:08:50,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:50,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 13:08:50,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-15 13:08:50,725 INFO L87 Difference]: Start difference. First operand 157 states and 310 transitions. Second operand 11 states. [2020-09-15 13:08:50,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:50,781 INFO L93 Difference]: Finished difference Result 184 states and 364 transitions. [2020-09-15 13:08:50,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 13:08:50,782 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-09-15 13:08:50,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:50,784 INFO L225 Difference]: With dead ends: 184 [2020-09-15 13:08:50,784 INFO L226 Difference]: Without dead ends: 184 [2020-09-15 13:08:50,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-15 13:08:50,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-15 13:08:50,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 175. [2020-09-15 13:08:50,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-09-15 13:08:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 346 transitions. [2020-09-15 13:08:50,795 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 346 transitions. Word has length 28 [2020-09-15 13:08:50,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:50,795 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 346 transitions. [2020-09-15 13:08:50,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 13:08:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 346 transitions. [2020-09-15 13:08:50,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-15 13:08:50,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:50,798 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:51,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-09-15 13:08:51,011 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:51,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:51,013 INFO L82 PathProgramCache]: Analyzing trace with hash -768099092, now seen corresponding path program 8 times [2020-09-15 13:08:51,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:51,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420099290] [2020-09-15 13:08:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-15 13:08:51,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420099290] [2020-09-15 13:08:51,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265327064] [2020-09-15 13:08:51,180 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 [2020-09-15 13:08:51,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:08:51,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:51,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 13:08:51,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-15 13:08:51,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:51,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-15 13:08:51,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484845805] [2020-09-15 13:08:51,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 13:08:51,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:51,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 13:08:51,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:08:51,336 INFO L87 Difference]: Start difference. First operand 175 states and 346 transitions. Second operand 12 states. [2020-09-15 13:08:51,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:51,388 INFO L93 Difference]: Finished difference Result 202 states and 400 transitions. [2020-09-15 13:08:51,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 13:08:51,390 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-09-15 13:08:51,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:51,392 INFO L225 Difference]: With dead ends: 202 [2020-09-15 13:08:51,392 INFO L226 Difference]: Without dead ends: 202 [2020-09-15 13:08:51,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-15 13:08:51,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-15 13:08:51,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 193. [2020-09-15 13:08:51,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-09-15 13:08:51,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 382 transitions. [2020-09-15 13:08:51,414 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 382 transitions. Word has length 30 [2020-09-15 13:08:51,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:51,416 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 382 transitions. [2020-09-15 13:08:51,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 13:08:51,416 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 382 transitions. [2020-09-15 13:08:51,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-15 13:08:51,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:51,418 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:51,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:51,625 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:51,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:51,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1359430431, now seen corresponding path program 9 times [2020-09-15 13:08:51,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:51,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109211894] [2020-09-15 13:08:51,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-15 13:08:51,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109211894] [2020-09-15 13:08:51,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365550845] [2020-09-15 13:08:51,827 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 [2020-09-15 13:08:51,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-15 13:08:51,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:51,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 13:08:51,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-09-15 13:08:52,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:52,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2020-09-15 13:08:52,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433049174] [2020-09-15 13:08:52,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 13:08:52,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:52,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 13:08:52,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-09-15 13:08:52,082 INFO L87 Difference]: Start difference. First operand 193 states and 382 transitions. Second operand 19 states. [2020-09-15 13:08:54,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:54,631 INFO L93 Difference]: Finished difference Result 244 states and 484 transitions. [2020-09-15 13:08:54,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-09-15 13:08:54,631 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2020-09-15 13:08:54,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:54,633 INFO L225 Difference]: With dead ends: 244 [2020-09-15 13:08:54,633 INFO L226 Difference]: Without dead ends: 244 [2020-09-15 13:08:54,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2376, Invalid=5456, Unknown=0, NotChecked=0, Total=7832 [2020-09-15 13:08:54,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-15 13:08:54,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 234. [2020-09-15 13:08:54,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-09-15 13:08:54,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 464 transitions. [2020-09-15 13:08:54,642 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 464 transitions. Word has length 32 [2020-09-15 13:08:54,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:54,642 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 464 transitions. [2020-09-15 13:08:54,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 13:08:54,643 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 464 transitions. [2020-09-15 13:08:54,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-15 13:08:54,644 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:54,644 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:54,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:08:54,859 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:54,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:54,860 INFO L82 PathProgramCache]: Analyzing trace with hash -377330477, now seen corresponding path program 10 times [2020-09-15 13:08:54,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:54,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755079672] [2020-09-15 13:08:54,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-09-15 13:08:54,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755079672] [2020-09-15 13:08:54,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978441810] [2020-09-15 13:08:54,974 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 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 [2020-09-15 13:08:55,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:08:55,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:55,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 13:08:55,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-15 13:08:55,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:55,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2020-09-15 13:08:55,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975235489] [2020-09-15 13:08:55,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-15 13:08:55,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:55,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-15 13:08:55,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2020-09-15 13:08:55,269 INFO L87 Difference]: Start difference. First operand 234 states and 464 transitions. Second operand 21 states. [2020-09-15 13:08:58,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:08:58,781 INFO L93 Difference]: Finished difference Result 290 states and 576 transitions. [2020-09-15 13:08:58,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-09-15 13:08:58,782 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-09-15 13:08:58,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:08:58,784 INFO L225 Difference]: With dead ends: 290 [2020-09-15 13:08:58,784 INFO L226 Difference]: Without dead ends: 290 [2020-09-15 13:08:58,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3905 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3510, Invalid=8262, Unknown=0, NotChecked=0, Total=11772 [2020-09-15 13:08:58,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-15 13:08:58,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 279. [2020-09-15 13:08:58,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-09-15 13:08:58,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 554 transitions. [2020-09-15 13:08:58,796 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 554 transitions. Word has length 35 [2020-09-15 13:08:58,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:08:58,796 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 554 transitions. [2020-09-15 13:08:58,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-15 13:08:58,796 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 554 transitions. [2020-09-15 13:08:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-15 13:08:58,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:08:58,798 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:08:59,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-09-15 13:08:59,009 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:08:59,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:08:59,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1024091301, now seen corresponding path program 11 times [2020-09-15 13:08:59,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:08:59,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920584365] [2020-09-15 13:08:59,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:08:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:08:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-09-15 13:08:59,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920584365] [2020-09-15 13:08:59,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444715408] [2020-09-15 13:08:59,216 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 [2020-09-15 13:08:59,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-15 13:08:59,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:08:59,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 13:08:59,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:08:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-09-15 13:08:59,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:08:59,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2020-09-15 13:08:59,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920163819] [2020-09-15 13:08:59,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 13:08:59,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:08:59,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 13:08:59,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-15 13:08:59,505 INFO L87 Difference]: Start difference. First operand 279 states and 554 transitions. Second operand 23 states. [2020-09-15 13:09:04,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:04,380 INFO L93 Difference]: Finished difference Result 340 states and 676 transitions. [2020-09-15 13:09:04,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2020-09-15 13:09:04,381 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2020-09-15 13:09:04,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:04,384 INFO L225 Difference]: With dead ends: 340 [2020-09-15 13:09:04,384 INFO L226 Difference]: Without dead ends: 340 [2020-09-15 13:09:04,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5877 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5005, Invalid=12025, Unknown=0, NotChecked=0, Total=17030 [2020-09-15 13:09:04,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-09-15 13:09:04,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 328. [2020-09-15 13:09:04,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-09-15 13:09:04,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 652 transitions. [2020-09-15 13:09:04,398 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 652 transitions. Word has length 38 [2020-09-15 13:09:04,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:04,398 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 652 transitions. [2020-09-15 13:09:04,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 13:09:04,399 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 652 transitions. [2020-09-15 13:09:04,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-15 13:09:04,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:04,400 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:04,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-15 13:09:04,614 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:04,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:04,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1006259789, now seen corresponding path program 12 times [2020-09-15 13:09:04,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:04,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913316942] [2020-09-15 13:09:04,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-09-15 13:09:04,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913316942] [2020-09-15 13:09:04,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713927290] [2020-09-15 13:09:04,871 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 [2020-09-15 13:09:04,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-15 13:09:04,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:09:04,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 13:09:04,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:05,216 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-09-15 13:09:05,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:05,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2020-09-15 13:09:05,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808487787] [2020-09-15 13:09:05,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-15 13:09:05,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:05,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-15 13:09:05,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-15 13:09:05,218 INFO L87 Difference]: Start difference. First operand 328 states and 652 transitions. Second operand 25 states. [2020-09-15 13:09:11,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:11,833 INFO L93 Difference]: Finished difference Result 394 states and 784 transitions. [2020-09-15 13:09:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2020-09-15 13:09:11,834 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 41 [2020-09-15 13:09:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:11,836 INFO L225 Difference]: With dead ends: 394 [2020-09-15 13:09:11,836 INFO L226 Difference]: Without dead ends: 394 [2020-09-15 13:09:11,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8505 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=6930, Invalid=16940, Unknown=0, NotChecked=0, Total=23870 [2020-09-15 13:09:11,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-09-15 13:09:11,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 381. [2020-09-15 13:09:11,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-09-15 13:09:11,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 758 transitions. [2020-09-15 13:09:11,851 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 758 transitions. Word has length 41 [2020-09-15 13:09:11,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:11,851 INFO L479 AbstractCegarLoop]: Abstraction has 381 states and 758 transitions. [2020-09-15 13:09:11,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-15 13:09:11,851 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 758 transitions. [2020-09-15 13:09:11,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-15 13:09:11,853 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:11,853 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:12,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-15 13:09:12,065 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:12,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:12,066 INFO L82 PathProgramCache]: Analyzing trace with hash 519022635, now seen corresponding path program 13 times [2020-09-15 13:09:12,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:12,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122986946] [2020-09-15 13:09:12,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-15 13:09:12,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122986946] [2020-09-15 13:09:12,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096921719] [2020-09-15 13:09:12,324 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 [2020-09-15 13:09:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:12,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-15 13:09:12,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-15 13:09:12,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:12,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-15 13:09:12,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883971560] [2020-09-15 13:09:12,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 13:09:12,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:12,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 13:09:12,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-15 13:09:12,464 INFO L87 Difference]: Start difference. First operand 381 states and 758 transitions. Second operand 17 states. [2020-09-15 13:09:12,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:12,538 INFO L93 Difference]: Finished difference Result 420 states and 836 transitions. [2020-09-15 13:09:12,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 13:09:12,538 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-09-15 13:09:12,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:12,541 INFO L225 Difference]: With dead ends: 420 [2020-09-15 13:09:12,542 INFO L226 Difference]: Without dead ends: 420 [2020-09-15 13:09:12,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-15 13:09:12,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-09-15 13:09:12,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 407. [2020-09-15 13:09:12,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-09-15 13:09:12,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 810 transitions. [2020-09-15 13:09:12,553 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 810 transitions. Word has length 44 [2020-09-15 13:09:12,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:12,553 INFO L479 AbstractCegarLoop]: Abstraction has 407 states and 810 transitions. [2020-09-15 13:09:12,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 13:09:12,553 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 810 transitions. [2020-09-15 13:09:12,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-15 13:09:12,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:12,555 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:12,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:12,768 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:12,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:12,769 INFO L82 PathProgramCache]: Analyzing trace with hash -942483170, now seen corresponding path program 14 times [2020-09-15 13:09:12,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:12,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801794614] [2020-09-15 13:09:12,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-15 13:09:13,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801794614] [2020-09-15 13:09:13,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517656561] [2020-09-15 13:09:13,040 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 [2020-09-15 13:09:13,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:09:13,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:09:13,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 13:09:13,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-15 13:09:13,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:13,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 13:09:13,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788970830] [2020-09-15 13:09:13,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 13:09:13,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:13,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 13:09:13,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-15 13:09:13,184 INFO L87 Difference]: Start difference. First operand 407 states and 810 transitions. Second operand 18 states. [2020-09-15 13:09:13,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:13,280 INFO L93 Difference]: Finished difference Result 446 states and 888 transitions. [2020-09-15 13:09:13,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 13:09:13,280 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-09-15 13:09:13,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:13,283 INFO L225 Difference]: With dead ends: 446 [2020-09-15 13:09:13,284 INFO L226 Difference]: Without dead ends: 446 [2020-09-15 13:09:13,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-15 13:09:13,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-09-15 13:09:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 433. [2020-09-15 13:09:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-09-15 13:09:13,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 862 transitions. [2020-09-15 13:09:13,297 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 862 transitions. Word has length 46 [2020-09-15 13:09:13,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:13,297 INFO L479 AbstractCegarLoop]: Abstraction has 433 states and 862 transitions. [2020-09-15 13:09:13,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 13:09:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 862 transitions. [2020-09-15 13:09:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-15 13:09:13,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:13,299 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:13,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-15 13:09:13,513 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:13,514 INFO L82 PathProgramCache]: Analyzing trace with hash -995255983, now seen corresponding path program 15 times [2020-09-15 13:09:13,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:13,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393116510] [2020-09-15 13:09:13,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-15 13:09:13,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393116510] [2020-09-15 13:09:13,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916708590] [2020-09-15 13:09:13,863 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 [2020-09-15 13:09:13,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-15 13:09:13,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:09:13,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 13:09:13,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-09-15 13:09:14,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:14,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 29 [2020-09-15 13:09:14,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563971851] [2020-09-15 13:09:14,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-15 13:09:14,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:14,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-15 13:09:14,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2020-09-15 13:09:14,229 INFO L87 Difference]: Start difference. First operand 433 states and 862 transitions. Second operand 29 states. [2020-09-15 13:09:25,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:25,169 INFO L93 Difference]: Finished difference Result 508 states and 1012 transitions. [2020-09-15 13:09:25,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2020-09-15 13:09:25,176 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 48 [2020-09-15 13:09:25,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:25,179 INFO L225 Difference]: With dead ends: 508 [2020-09-15 13:09:25,179 INFO L226 Difference]: Without dead ends: 508 [2020-09-15 13:09:25,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15565 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=11934, Invalid=29886, Unknown=0, NotChecked=0, Total=41820 [2020-09-15 13:09:25,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-09-15 13:09:25,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 494. [2020-09-15 13:09:25,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-09-15 13:09:25,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 984 transitions. [2020-09-15 13:09:25,196 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 984 transitions. Word has length 48 [2020-09-15 13:09:25,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:25,196 INFO L479 AbstractCegarLoop]: Abstraction has 494 states and 984 transitions. [2020-09-15 13:09:25,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-15 13:09:25,196 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 984 transitions. [2020-09-15 13:09:25,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-15 13:09:25,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:25,198 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:25,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-15 13:09:25,411 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:25,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:25,412 INFO L82 PathProgramCache]: Analyzing trace with hash -954639647, now seen corresponding path program 16 times [2020-09-15 13:09:25,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:25,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364410455] [2020-09-15 13:09:25,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-15 13:09:25,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364410455] [2020-09-15 13:09:25,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075168000] [2020-09-15 13:09:25,774 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 [2020-09-15 13:09:25,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:09:25,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:09:25,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-15 13:09:25,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-15 13:09:25,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:25,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-15 13:09:25,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609729387] [2020-09-15 13:09:25,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 13:09:25,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:25,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 13:09:25,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:09:25,905 INFO L87 Difference]: Start difference. First operand 494 states and 984 transitions. Second operand 20 states. [2020-09-15 13:09:25,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:25,977 INFO L93 Difference]: Finished difference Result 536 states and 1068 transitions. [2020-09-15 13:09:25,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 13:09:25,977 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2020-09-15 13:09:25,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:25,980 INFO L225 Difference]: With dead ends: 536 [2020-09-15 13:09:25,981 INFO L226 Difference]: Without dead ends: 536 [2020-09-15 13:09:25,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-15 13:09:25,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-09-15 13:09:25,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 522. [2020-09-15 13:09:25,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-09-15 13:09:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1040 transitions. [2020-09-15 13:09:25,993 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1040 transitions. Word has length 51 [2020-09-15 13:09:25,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:25,994 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 1040 transitions. [2020-09-15 13:09:25,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 13:09:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1040 transitions. [2020-09-15 13:09:25,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-15 13:09:25,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:25,996 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:26,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-15 13:09:26,199 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:26,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:26,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1140997490, now seen corresponding path program 17 times [2020-09-15 13:09:26,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:26,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340738949] [2020-09-15 13:09:26,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-15 13:09:26,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340738949] [2020-09-15 13:09:26,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507996395] [2020-09-15 13:09:26,586 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 [2020-09-15 13:09:26,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-09-15 13:09:26,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:09:26,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 13:09:26,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:27,016 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-09-15 13:09:27,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:27,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2020-09-15 13:09:27,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260777022] [2020-09-15 13:09:27,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-15 13:09:27,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:27,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-15 13:09:27,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2020-09-15 13:09:27,018 INFO L87 Difference]: Start difference. First operand 522 states and 1040 transitions. Second operand 32 states. [2020-09-15 13:09:42,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:09:42,696 INFO L93 Difference]: Finished difference Result 604 states and 1204 transitions. [2020-09-15 13:09:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2020-09-15 13:09:42,697 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 53 [2020-09-15 13:09:42,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:09:42,700 INFO L225 Difference]: With dead ends: 604 [2020-09-15 13:09:42,701 INFO L226 Difference]: Without dead ends: 604 [2020-09-15 13:09:42,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23424 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=17290, Invalid=43966, Unknown=0, NotChecked=0, Total=61256 [2020-09-15 13:09:42,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-09-15 13:09:42,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 589. [2020-09-15 13:09:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2020-09-15 13:09:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1174 transitions. [2020-09-15 13:09:42,718 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1174 transitions. Word has length 53 [2020-09-15 13:09:42,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:09:42,718 INFO L479 AbstractCegarLoop]: Abstraction has 589 states and 1174 transitions. [2020-09-15 13:09:42,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-15 13:09:42,718 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1174 transitions. [2020-09-15 13:09:42,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-15 13:09:42,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:09:42,720 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:09:42,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:09:42,934 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:09:42,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:09:42,935 INFO L82 PathProgramCache]: Analyzing trace with hash 625395594, now seen corresponding path program 18 times [2020-09-15 13:09:42,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:09:42,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793396506] [2020-09-15 13:09:42,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:09:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:09:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-09-15 13:09:43,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793396506] [2020-09-15 13:09:43,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109242807] [2020-09-15 13:09:43,309 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 [2020-09-15 13:09:43,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-15 13:09:43,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:09:43,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 13:09:43,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:09:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-09-15 13:09:43,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:09:43,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 34 [2020-09-15 13:09:43,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325584849] [2020-09-15 13:09:43,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-15 13:09:43,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:09:43,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-15 13:09:43,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 13:09:43,820 INFO L87 Difference]: Start difference. First operand 589 states and 1174 transitions. Second operand 34 states. [2020-09-15 13:10:03,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:10:03,695 INFO L93 Difference]: Finished difference Result 676 states and 1348 transitions. [2020-09-15 13:10:03,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 281 states. [2020-09-15 13:10:03,696 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 56 [2020-09-15 13:10:03,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:10:03,700 INFO L225 Difference]: With dead ends: 676 [2020-09-15 13:10:03,700 INFO L226 Difference]: Without dead ends: 676 [2020-09-15 13:10:03,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30615 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=22050, Invalid=56630, Unknown=0, NotChecked=0, Total=78680 [2020-09-15 13:10:03,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2020-09-15 13:10:03,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 660. [2020-09-15 13:10:03,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 660 states. [2020-09-15 13:10:03,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1316 transitions. [2020-09-15 13:10:03,717 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1316 transitions. Word has length 56 [2020-09-15 13:10:03,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:10:03,718 INFO L479 AbstractCegarLoop]: Abstraction has 660 states and 1316 transitions. [2020-09-15 13:10:03,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-15 13:10:03,718 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1316 transitions. [2020-09-15 13:10:03,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-15 13:10:03,719 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:10:03,720 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:10:03,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:10:03,934 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:10:03,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:10:03,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1598900536, now seen corresponding path program 19 times [2020-09-15 13:10:03,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:10:03,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871573114] [2020-09-15 13:10:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:10:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:10:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-09-15 13:10:04,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871573114] [2020-09-15 13:10:04,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535082155] [2020-09-15 13:10:04,421 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 [2020-09-15 13:10:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:10:04,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-15 13:10:04,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:10:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-09-15 13:10:04,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:10:04,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-15 13:10:04,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667296742] [2020-09-15 13:10:04,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-15 13:10:04,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:10:04,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-15 13:10:04,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-15 13:10:04,584 INFO L87 Difference]: Start difference. First operand 660 states and 1316 transitions. Second operand 23 states. [2020-09-15 13:10:04,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:10:04,706 INFO L93 Difference]: Finished difference Result 692 states and 1380 transitions. [2020-09-15 13:10:04,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 13:10:04,707 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2020-09-15 13:10:04,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:10:04,710 INFO L225 Difference]: With dead ends: 692 [2020-09-15 13:10:04,710 INFO L226 Difference]: Without dead ends: 692 [2020-09-15 13:10:04,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-15 13:10:04,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2020-09-15 13:10:04,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 692. [2020-09-15 13:10:04,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2020-09-15 13:10:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1380 transitions. [2020-09-15 13:10:04,726 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1380 transitions. Word has length 59 [2020-09-15 13:10:04,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:10:04,727 INFO L479 AbstractCegarLoop]: Abstraction has 692 states and 1380 transitions. [2020-09-15 13:10:04,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-15 13:10:04,727 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1380 transitions. [2020-09-15 13:10:04,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-15 13:10:04,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:10:04,729 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:10:04,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-15 13:10:04,942 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:10:04,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:10:04,943 INFO L82 PathProgramCache]: Analyzing trace with hash 746529141, now seen corresponding path program 20 times [2020-09-15 13:10:04,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:10:04,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663366607] [2020-09-15 13:10:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:10:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:10:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-09-15 13:10:05,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663366607] [2020-09-15 13:10:05,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769833156] [2020-09-15 13:10:05,199 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 [2020-09-15 13:10:05,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 13:10:05,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:10:05,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 55 conjunts are in the unsatisfiable core [2020-09-15 13:10:05,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:10:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:10:07,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:10:07,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 54] total 70 [2020-09-15 13:10:07,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718480384] [2020-09-15 13:10:07,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-09-15 13:10:07,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:10:07,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-09-15 13:10:07,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=979, Invalid=3851, Unknown=0, NotChecked=0, Total=4830 [2020-09-15 13:10:07,817 INFO L87 Difference]: Start difference. First operand 692 states and 1380 transitions. Second operand 70 states. [2020-09-15 13:11:45,969 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-09-15 13:12:43,412 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-09-15 13:18:19,932 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-09-15 13:18:26,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:26,772 INFO L93 Difference]: Finished difference Result 38046 states and 76072 transitions. [2020-09-15 13:18:26,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3033 states. [2020-09-15 13:18:26,776 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 61 [2020-09-15 13:18:26,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:26,909 INFO L225 Difference]: With dead ends: 38046 [2020-09-15 13:18:26,909 INFO L226 Difference]: Without dead ends: 38018 [2020-09-15 13:18:27,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3485 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 3044 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217742 ImplicationChecksByTransitivity, 447.5s TimeCoverageRelationStatistics Valid=2254412, Invalid=7020658, Unknown=0, NotChecked=0, Total=9275070 [2020-09-15 13:18:27,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38018 states. [2020-09-15 13:18:27,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38018 to 1389. [2020-09-15 13:18:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1389 states. [2020-09-15 13:18:27,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 2931 transitions. [2020-09-15 13:18:27,525 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 2931 transitions. Word has length 61 [2020-09-15 13:18:27,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:27,525 INFO L479 AbstractCegarLoop]: Abstraction has 1389 states and 2931 transitions. [2020-09-15 13:18:27,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-09-15 13:18:27,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 2931 transitions. [2020-09-15 13:18:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-15 13:18:27,529 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:27,529 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:27,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-15 13:18:27,744 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:27,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:27,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1697933392, now seen corresponding path program 21 times [2020-09-15 13:18:27,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:27,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165490825] [2020-09-15 13:18:27,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 20 proven. 105 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-09-15 13:18:28,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165490825] [2020-09-15 13:18:28,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137364937] [2020-09-15 13:18:28,358 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 [2020-09-15 13:18:28,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-15 13:18:28,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:18:28,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-15 13:18:28,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:18:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 20 proven. 105 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-09-15 13:18:28,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:18:28,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-15 13:18:28,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568684635] [2020-09-15 13:18:28,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 13:18:28,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:28,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 13:18:28,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-15 13:18:28,527 INFO L87 Difference]: Start difference. First operand 1389 states and 2931 transitions. Second operand 18 states. [2020-09-15 13:18:28,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 13:18:28,769 INFO L93 Difference]: Finished difference Result 1604 states and 3256 transitions. [2020-09-15 13:18:28,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 13:18:28,773 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-09-15 13:18:28,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 13:18:28,778 INFO L225 Difference]: With dead ends: 1604 [2020-09-15 13:18:28,778 INFO L226 Difference]: Without dead ends: 1604 [2020-09-15 13:18:28,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-15 13:18:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2020-09-15 13:18:28,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1471. [2020-09-15 13:18:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1471 states. [2020-09-15 13:18:28,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3095 transitions. [2020-09-15 13:18:28,806 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3095 transitions. Word has length 62 [2020-09-15 13:18:28,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 13:18:28,806 INFO L479 AbstractCegarLoop]: Abstraction has 1471 states and 3095 transitions. [2020-09-15 13:18:28,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 13:18:28,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3095 transitions. [2020-09-15 13:18:28,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-15 13:18:28,810 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 13:18:28,811 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 13:18:29,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:18:29,024 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 13:18:29,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 13:18:29,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1126694101, now seen corresponding path program 22 times [2020-09-15 13:18:29,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 13:18:29,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088889585] [2020-09-15 13:18:29,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 13:18:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 13:18:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 20 proven. 120 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-09-15 13:18:29,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088889585] [2020-09-15 13:18:29,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119488666] [2020-09-15 13:18:29,696 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 13:18:29,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 13:18:29,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 13:18:29,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 57 conjunts are in the unsatisfiable core [2020-09-15 13:18:29,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 13:18:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 13:18:37,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 13:18:37,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 56] total 74 [2020-09-15 13:18:37,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610928262] [2020-09-15 13:18:37,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-09-15 13:18:37,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 13:18:37,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-09-15 13:18:37,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=4317, Unknown=0, NotChecked=0, Total=5402 [2020-09-15 13:18:37,034 INFO L87 Difference]: Start difference. First operand 1471 states and 3095 transitions. Second operand 74 states. [2020-09-15 13:21:10,170 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 10