/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 16:02:59,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 16:02:59,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 16:02:59,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 16:02:59,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 16:02:59,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 16:02:59,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 16:02:59,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 16:02:59,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 16:02:59,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 16:02:59,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 16:02:59,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 16:02:59,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 16:02:59,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 16:02:59,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 16:02:59,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 16:02:59,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 16:02:59,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 16:02:59,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 16:02:59,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 16:02:59,730 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 16:02:59,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 16:02:59,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 16:02:59,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 16:02:59,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-11 16:02:59,742 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-11 16:02:59,743 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-11 16:02:59,748 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-11 16:02:59,749 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-11 16:02:59,750 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-11 16:02:59,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 16:02:59,751 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 16:02:59,753 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 16:02:59,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 16:02:59,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 16:02:59,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 16:02:59,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 16:02:59,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 16:02:59,757 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 16:02:59,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 16:02:59,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 16:02:59,761 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-11 16:02:59,825 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 16:02:59,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 16:02:59,827 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 16:02:59,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 16:02:59,828 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 16:02:59,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 16:02:59,828 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 16:02:59,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 16:02:59,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 16:02:59,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 16:02:59,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 16:02:59,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 16:02:59,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 16:02:59,830 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 16:02:59,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 16:02:59,831 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 16:02:59,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 16:02:59,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 16:02:59,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 16:02:59,832 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 16:02:59,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 16:02:59,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 16:02:59,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 16:02:59,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-11 16:02:59,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 16:02:59,834 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 16:02:59,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 16:02:59,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 16:02:59,834 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-11 16:02:59,834 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-11 16:03:00,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 16:03:00,365 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 16:03:00,369 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 16:03:00,371 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 16:03:00,371 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 16:03:00,372 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-09-11 16:03:00,468 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8507498a9/8a89c08f9c5b4d12b78ca58a02cc108f/FLAG418b72802 [2020-09-11 16:03:01,152 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 16:03:01,153 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2020-09-11 16:03:01,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8507498a9/8a89c08f9c5b4d12b78ca58a02cc108f/FLAG418b72802 [2020-09-11 16:03:01,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8507498a9/8a89c08f9c5b4d12b78ca58a02cc108f [2020-09-11 16:03:01,387 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 16:03:01,394 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 16:03:01,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 16:03:01,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 16:03:01,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 16:03:01,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 04:03:01" (1/1) ... [2020-09-11 16:03:01,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d8a89f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:01, skipping insertion in model container [2020-09-11 16:03:01,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 04:03:01" (1/1) ... [2020-09-11 16:03:01,414 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 16:03:01,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 16:03:02,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 16:03:02,221 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 16:03:02,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 16:03:02,532 INFO L208 MainTranslator]: Completed translation [2020-09-11 16:03:02,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:02 WrapperNode [2020-09-11 16:03:02,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 16:03:02,536 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 16:03:02,537 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 16:03:02,537 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 16:03:02,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:02" (1/1) ... [2020-09-11 16:03:02,604 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:02" (1/1) ... [2020-09-11 16:03:02,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 16:03:02,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 16:03:02,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 16:03:02,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 16:03:02,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:02" (1/1) ... [2020-09-11 16:03:02,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:02" (1/1) ... [2020-09-11 16:03:02,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:02" (1/1) ... [2020-09-11 16:03:02,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:02" (1/1) ... [2020-09-11 16:03:02,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:02" (1/1) ... [2020-09-11 16:03:02,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:02" (1/1) ... [2020-09-11 16:03:02,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:02" (1/1) ... [2020-09-11 16:03:02,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 16:03:02,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 16:03:02,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 16:03:02,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 16:03:02,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:02" (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 [2020-09-11 16:03:02,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 16:03:02,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 16:03:02,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-11 16:03:02,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 16:03:02,768 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-09-11 16:03:02,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-09-11 16:03:02,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-09-11 16:03:02,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-11 16:03:02,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 16:03:02,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 16:03:02,772 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-11 16:03:03,218 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 16:03:03,219 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-11 16:03:03,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 04:03:03 BoogieIcfgContainer [2020-09-11 16:03:03,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 16:03:03,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 16:03:03,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 16:03:03,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 16:03:03,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 04:03:01" (1/3) ... [2020-09-11 16:03:03,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9bf2fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 04:03:03, skipping insertion in model container [2020-09-11 16:03:03,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:02" (2/3) ... [2020-09-11 16:03:03,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9bf2fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 04:03:03, skipping insertion in model container [2020-09-11 16:03:03,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 04:03:03" (3/3) ... [2020-09-11 16:03:03,238 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-09-11 16:03:03,249 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 16:03:03,250 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-11 16:03:03,260 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 16:03:03,261 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 16:03:03,292 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,292 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,292 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,293 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,293 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,293 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,294 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,294 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,294 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,294 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,294 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,295 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,295 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,295 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,296 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,296 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,296 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,296 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,297 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,297 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,297 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,297 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,298 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,302 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,302 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,303 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,303 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,303 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,303 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,304 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,304 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,304 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:03,339 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-11 16:03:03,363 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 16:03:03,364 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 16:03:03,364 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-11 16:03:03,364 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-11 16:03:03,364 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 16:03:03,364 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 16:03:03,364 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 16:03:03,364 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 16:03:03,382 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 81 transitions, 170 flow [2020-09-11 16:03:03,384 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-09-11 16:03:03,440 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-09-11 16:03:03,440 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-11 16:03:03,446 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-09-11 16:03:03,449 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions, 170 flow [2020-09-11 16:03:03,478 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2020-09-11 16:03:03,479 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-11 16:03:03,480 INFO L80 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-09-11 16:03:03,482 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 646 [2020-09-11 16:03:03,483 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-11 16:03:05,561 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-09-11 16:03:05,740 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-09-11 16:03:06,451 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2020-09-11 16:03:06,771 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-09-11 16:03:06,780 INFO L206 etLargeBlockEncoding]: Checked pairs total: 738 [2020-09-11 16:03:06,781 INFO L214 etLargeBlockEncoding]: Total number of compositions: 70 [2020-09-11 16:03:06,786 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 17 transitions, 42 flow [2020-09-11 16:03:06,798 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2020-09-11 16:03:06,800 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-09-11 16:03:06,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 16:03:06,810 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:06,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:06,812 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:06,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:06,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1717538151, now seen corresponding path program 1 times [2020-09-11 16:03:06,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:06,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728699262] [2020-09-11 16:03:06,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:03:07,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728699262] [2020-09-11 16:03:07,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:03:07,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 16:03:07,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169637864] [2020-09-11 16:03:07,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-11 16:03:07,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:07,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-11 16:03:07,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-11 16:03:07,161 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-09-11 16:03:07,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:07,211 INFO L93 Difference]: Finished difference Result 52 states and 100 transitions. [2020-09-11 16:03:07,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-11 16:03:07,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-09-11 16:03:07,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:07,230 INFO L225 Difference]: With dead ends: 52 [2020-09-11 16:03:07,231 INFO L226 Difference]: Without dead ends: 52 [2020-09-11 16:03:07,233 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 [2020-09-11 16:03:07,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-11 16:03:07,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-11 16:03:07,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-11 16:03:07,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2020-09-11 16:03:07,285 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 8 [2020-09-11 16:03:07,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:07,285 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2020-09-11 16:03:07,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-11 16:03:07,286 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2020-09-11 16:03:07,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:03:07,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:07,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:07,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 16:03:07,288 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:07,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:07,288 INFO L82 PathProgramCache]: Analyzing trace with hash 62706239, now seen corresponding path program 1 times [2020-09-11 16:03:07,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:07,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955592114] [2020-09-11 16:03:07,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:03:07,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955592114] [2020-09-11 16:03:07,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:03:07,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 16:03:07,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561817717] [2020-09-11 16:03:07,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-11 16:03:07,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:07,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-11 16:03:07,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-11 16:03:07,415 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand 3 states. [2020-09-11 16:03:07,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:07,435 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2020-09-11 16:03:07,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-11 16:03:07,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-11 16:03:07,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:07,438 INFO L225 Difference]: With dead ends: 64 [2020-09-11 16:03:07,438 INFO L226 Difference]: Without dead ends: 64 [2020-09-11 16:03:07,440 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 [2020-09-11 16:03:07,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-11 16:03:07,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2020-09-11 16:03:07,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 16:03:07,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2020-09-11 16:03:07,451 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 11 [2020-09-11 16:03:07,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:07,451 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2020-09-11 16:03:07,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-11 16:03:07,451 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2020-09-11 16:03:07,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:03:07,458 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:07,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:07,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 16:03:07,459 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:07,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:07,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1954756591, now seen corresponding path program 1 times [2020-09-11 16:03:07,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:07,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58652667] [2020-09-11 16:03:07,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:03:07,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58652667] [2020-09-11 16:03:07,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:03:07,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 16:03:07,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179892858] [2020-09-11 16:03:07,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-11 16:03:07,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:07,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-11 16:03:07,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-11 16:03:07,574 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand 3 states. [2020-09-11 16:03:07,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:07,598 INFO L93 Difference]: Finished difference Result 40 states and 66 transitions. [2020-09-11 16:03:07,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-11 16:03:07,599 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-09-11 16:03:07,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:07,600 INFO L225 Difference]: With dead ends: 40 [2020-09-11 16:03:07,600 INFO L226 Difference]: Without dead ends: 40 [2020-09-11 16:03:07,601 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 [2020-09-11 16:03:07,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-11 16:03:07,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-11 16:03:07,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-11 16:03:07,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 66 transitions. [2020-09-11 16:03:07,606 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 66 transitions. Word has length 15 [2020-09-11 16:03:07,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:07,607 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 66 transitions. [2020-09-11 16:03:07,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-11 16:03:07,607 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 66 transitions. [2020-09-11 16:03:07,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 16:03:07,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:07,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:07,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 16:03:07,609 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:07,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:07,609 INFO L82 PathProgramCache]: Analyzing trace with hash 525517821, now seen corresponding path program 2 times [2020-09-11 16:03:07,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:07,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309271785] [2020-09-11 16:03:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:07,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:03:07,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309271785] [2020-09-11 16:03:07,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108951148] [2020-09-11 16:03:07,679 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 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 [2020-09-11 16:03:07,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:03:07,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:07,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-11 16:03:07,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:03:07,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:07,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-09-11 16:03:07,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868457868] [2020-09-11 16:03:07,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:03:07,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:07,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:03:07,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:03:07,836 INFO L87 Difference]: Start difference. First operand 40 states and 66 transitions. Second operand 6 states. [2020-09-11 16:03:07,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:07,987 INFO L93 Difference]: Finished difference Result 104 states and 159 transitions. [2020-09-11 16:03:07,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:03:07,989 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-09-11 16:03:07,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:07,990 INFO L225 Difference]: With dead ends: 104 [2020-09-11 16:03:07,991 INFO L226 Difference]: Without dead ends: 104 [2020-09-11 16:03:07,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:03:07,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-11 16:03:07,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2020-09-11 16:03:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 16:03:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 124 transitions. [2020-09-11 16:03:08,001 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 124 transitions. Word has length 15 [2020-09-11 16:03:08,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:08,001 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 124 transitions. [2020-09-11 16:03:08,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:03:08,001 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2020-09-11 16:03:08,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:03:08,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:08,003 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:08,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:08,217 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:08,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:08,218 INFO L82 PathProgramCache]: Analyzing trace with hash 485096059, now seen corresponding path program 3 times [2020-09-11 16:03:08,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:08,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602040244] [2020-09-11 16:03:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-11 16:03:08,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602040244] [2020-09-11 16:03:08,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239140480] [2020-09-11 16:03:08,310 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 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 [2020-09-11 16:03:08,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:03:08,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:08,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-11 16:03:08,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-11 16:03:08,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:08,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-09-11 16:03:08,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990805149] [2020-09-11 16:03:08,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:03:08,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:08,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:03:08,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:03:08,472 INFO L87 Difference]: Start difference. First operand 79 states and 124 transitions. Second operand 8 states. [2020-09-11 16:03:08,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:08,745 INFO L93 Difference]: Finished difference Result 160 states and 236 transitions. [2020-09-11 16:03:08,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:03:08,746 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-09-11 16:03:08,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:08,751 INFO L225 Difference]: With dead ends: 160 [2020-09-11 16:03:08,752 INFO L226 Difference]: Without dead ends: 160 [2020-09-11 16:03:08,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:03:08,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-11 16:03:08,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 130. [2020-09-11 16:03:08,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-11 16:03:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 196 transitions. [2020-09-11 16:03:08,785 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 196 transitions. Word has length 22 [2020-09-11 16:03:08,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:08,785 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 196 transitions. [2020-09-11 16:03:08,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:03:08,786 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 196 transitions. [2020-09-11 16:03:08,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-11 16:03:08,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:08,788 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:09,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:09,003 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:09,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:09,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1548321815, now seen corresponding path program 4 times [2020-09-11 16:03:09,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:09,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961583855] [2020-09-11 16:03:09,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-11 16:03:09,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961583855] [2020-09-11 16:03:09,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174827156] [2020-09-11 16:03:09,103 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 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 [2020-09-11 16:03:09,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:03:09,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:09,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-11 16:03:09,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:09,235 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-11 16:03:09,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:09,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 16:03:09,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956134475] [2020-09-11 16:03:09,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 16:03:09,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:09,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 16:03:09,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-11 16:03:09,237 INFO L87 Difference]: Start difference. First operand 130 states and 196 transitions. Second operand 7 states. [2020-09-11 16:03:09,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:09,270 INFO L93 Difference]: Finished difference Result 178 states and 262 transitions. [2020-09-11 16:03:09,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-11 16:03:09,271 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-11 16:03:09,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:09,273 INFO L225 Difference]: With dead ends: 178 [2020-09-11 16:03:09,273 INFO L226 Difference]: Without dead ends: 178 [2020-09-11 16:03:09,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-09-11 16:03:09,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-09-11 16:03:09,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 160. [2020-09-11 16:03:09,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-11 16:03:09,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 238 transitions. [2020-09-11 16:03:09,291 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 238 transitions. Word has length 29 [2020-09-11 16:03:09,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:09,292 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 238 transitions. [2020-09-11 16:03:09,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 16:03:09,292 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 238 transitions. [2020-09-11 16:03:09,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-11 16:03:09,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:09,294 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:09,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:09,506 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:09,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:09,507 INFO L82 PathProgramCache]: Analyzing trace with hash -2012714619, now seen corresponding path program 5 times [2020-09-11 16:03:09,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:09,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094249745] [2020-09-11 16:03:09,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-11 16:03:09,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094249745] [2020-09-11 16:03:09,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312211328] [2020-09-11 16:03:09,635 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 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 [2020-09-11 16:03:09,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 16:03:09,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:09,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-11 16:03:09,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-11 16:03:09,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:09,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 16:03:09,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877652564] [2020-09-11 16:03:09,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 16:03:09,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:09,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 16:03:09,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:03:09,783 INFO L87 Difference]: Start difference. First operand 160 states and 238 transitions. Second operand 8 states. [2020-09-11 16:03:09,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:09,819 INFO L93 Difference]: Finished difference Result 208 states and 304 transitions. [2020-09-11 16:03:09,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 16:03:09,821 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-11 16:03:09,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:09,822 INFO L225 Difference]: With dead ends: 208 [2020-09-11 16:03:09,822 INFO L226 Difference]: Without dead ends: 208 [2020-09-11 16:03:09,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-09-11 16:03:09,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-11 16:03:09,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 190. [2020-09-11 16:03:09,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-09-11 16:03:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 280 transitions. [2020-09-11 16:03:09,847 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 280 transitions. Word has length 33 [2020-09-11 16:03:09,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:09,848 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 280 transitions. [2020-09-11 16:03:09,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 16:03:09,848 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 280 transitions. [2020-09-11 16:03:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-11 16:03:09,853 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:09,853 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:10,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:10,072 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:10,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:10,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1171974131, now seen corresponding path program 6 times [2020-09-11 16:03:10,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:10,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598741792] [2020-09-11 16:03:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-11 16:03:10,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598741792] [2020-09-11 16:03:10,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980697682] [2020-09-11 16:03:10,199 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 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 [2020-09-11 16:03:10,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:03:10,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:10,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-11 16:03:10,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-09-11 16:03:10,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:10,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-09-11 16:03:10,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261674886] [2020-09-11 16:03:10,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:03:10,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:10,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:03:10,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:03:10,381 INFO L87 Difference]: Start difference. First operand 190 states and 280 transitions. Second operand 12 states. [2020-09-11 16:03:11,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:11,044 INFO L93 Difference]: Finished difference Result 304 states and 429 transitions. [2020-09-11 16:03:11,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 16:03:11,045 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-09-11 16:03:11,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:11,047 INFO L225 Difference]: With dead ends: 304 [2020-09-11 16:03:11,047 INFO L226 Difference]: Without dead ends: 304 [2020-09-11 16:03:11,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 16:03:11,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-11 16:03:11,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 265. [2020-09-11 16:03:11,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-09-11 16:03:11,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 380 transitions. [2020-09-11 16:03:11,061 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 380 transitions. Word has length 37 [2020-09-11 16:03:11,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:11,062 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 380 transitions. [2020-09-11 16:03:11,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:03:11,062 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 380 transitions. [2020-09-11 16:03:11,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-11 16:03:11,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:11,065 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:11,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:11,282 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:11,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:11,282 INFO L82 PathProgramCache]: Analyzing trace with hash -870694653, now seen corresponding path program 7 times [2020-09-11 16:03:11,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:11,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570885567] [2020-09-11 16:03:11,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-11 16:03:11,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570885567] [2020-09-11 16:03:11,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558217634] [2020-09-11 16:03:11,451 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 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 [2020-09-11 16:03:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:11,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:03:11,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-11 16:03:11,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:11,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 16:03:11,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143357718] [2020-09-11 16:03:11,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 16:03:11,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:11,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 16:03:11,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:03:11,556 INFO L87 Difference]: Start difference. First operand 265 states and 380 transitions. Second operand 10 states. [2020-09-11 16:03:11,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:11,599 INFO L93 Difference]: Finished difference Result 322 states and 456 transitions. [2020-09-11 16:03:11,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 16:03:11,601 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-09-11 16:03:11,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:11,604 INFO L225 Difference]: With dead ends: 322 [2020-09-11 16:03:11,605 INFO L226 Difference]: Without dead ends: 322 [2020-09-11 16:03:11,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:03:11,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-09-11 16:03:11,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 301. [2020-09-11 16:03:11,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-09-11 16:03:11,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 429 transitions. [2020-09-11 16:03:11,613 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 429 transitions. Word has length 44 [2020-09-11 16:03:11,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:11,613 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 429 transitions. [2020-09-11 16:03:11,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 16:03:11,613 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 429 transitions. [2020-09-11 16:03:11,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-11 16:03:11,616 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:11,616 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:11,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:11,830 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:11,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:11,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1422004693, now seen corresponding path program 8 times [2020-09-11 16:03:11,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:11,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550639804] [2020-09-11 16:03:11,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-11 16:03:11,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550639804] [2020-09-11 16:03:11,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667563052] [2020-09-11 16:03:11,987 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 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 [2020-09-11 16:03:12,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:03:12,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:12,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:03:12,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-11 16:03:12,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:12,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:03:12,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663018014] [2020-09-11 16:03:12,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:03:12,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:12,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:03:12,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:03:12,098 INFO L87 Difference]: Start difference. First operand 301 states and 429 transitions. Second operand 11 states. [2020-09-11 16:03:12,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:12,138 INFO L93 Difference]: Finished difference Result 358 states and 505 transitions. [2020-09-11 16:03:12,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:03:12,139 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-09-11 16:03:12,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:12,141 INFO L225 Difference]: With dead ends: 358 [2020-09-11 16:03:12,141 INFO L226 Difference]: Without dead ends: 358 [2020-09-11 16:03:12,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:03:12,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-09-11 16:03:12,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 337. [2020-09-11 16:03:12,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-09-11 16:03:12,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 478 transitions. [2020-09-11 16:03:12,150 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 478 transitions. Word has length 48 [2020-09-11 16:03:12,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:12,150 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 478 transitions. [2020-09-11 16:03:12,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:03:12,150 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 478 transitions. [2020-09-11 16:03:12,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-11 16:03:12,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:12,152 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:12,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-11 16:03:12,360 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:12,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:12,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1332663897, now seen corresponding path program 9 times [2020-09-11 16:03:12,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:12,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958334744] [2020-09-11 16:03:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 10 proven. 120 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-11 16:03:12,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958334744] [2020-09-11 16:03:12,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964046899] [2020-09-11 16:03:12,572 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 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 [2020-09-11 16:03:12,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 16:03:12,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:12,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-11 16:03:12,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-09-11 16:03:12,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:12,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2020-09-11 16:03:12,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299095440] [2020-09-11 16:03:12,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:03:12,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:12,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:03:12,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:03:12,760 INFO L87 Difference]: Start difference. First operand 337 states and 478 transitions. Second operand 16 states. [2020-09-11 16:03:14,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:14,186 INFO L93 Difference]: Finished difference Result 484 states and 664 transitions. [2020-09-11 16:03:14,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-11 16:03:14,187 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-09-11 16:03:14,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:14,190 INFO L225 Difference]: With dead ends: 484 [2020-09-11 16:03:14,190 INFO L226 Difference]: Without dead ends: 484 [2020-09-11 16:03:14,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1155, Invalid=2505, Unknown=0, NotChecked=0, Total=3660 [2020-09-11 16:03:14,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-09-11 16:03:14,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 436. [2020-09-11 16:03:14,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-09-11 16:03:14,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 606 transitions. [2020-09-11 16:03:14,203 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 606 transitions. Word has length 52 [2020-09-11 16:03:14,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:14,203 INFO L479 AbstractCegarLoop]: Abstraction has 436 states and 606 transitions. [2020-09-11 16:03:14,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:03:14,203 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 606 transitions. [2020-09-11 16:03:14,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-11 16:03:14,205 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:14,205 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:14,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-11 16:03:14,419 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:14,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:14,420 INFO L82 PathProgramCache]: Analyzing trace with hash 298647787, now seen corresponding path program 10 times [2020-09-11 16:03:14,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:14,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145262581] [2020-09-11 16:03:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 13 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-11 16:03:14,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145262581] [2020-09-11 16:03:14,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229237728] [2020-09-11 16:03:14,619 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 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 [2020-09-11 16:03:14,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:03:14,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:14,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:03:14,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 13 proven. 153 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-11 16:03:14,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:14,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:03:14,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712045750] [2020-09-11 16:03:14,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:03:14,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:14,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:03:14,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:03:14,789 INFO L87 Difference]: Start difference. First operand 436 states and 606 transitions. Second operand 13 states. [2020-09-11 16:03:14,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:14,855 INFO L93 Difference]: Finished difference Result 502 states and 692 transitions. [2020-09-11 16:03:14,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:03:14,856 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-09-11 16:03:14,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:14,859 INFO L225 Difference]: With dead ends: 502 [2020-09-11 16:03:14,859 INFO L226 Difference]: Without dead ends: 502 [2020-09-11 16:03:14,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:03:14,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-09-11 16:03:14,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 478. [2020-09-11 16:03:14,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-09-11 16:03:14,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 662 transitions. [2020-09-11 16:03:14,874 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 662 transitions. Word has length 59 [2020-09-11 16:03:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:14,876 INFO L479 AbstractCegarLoop]: Abstraction has 478 states and 662 transitions. [2020-09-11 16:03:14,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:03:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 662 transitions. [2020-09-11 16:03:14,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-11 16:03:14,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:14,878 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:15,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:15,079 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:15,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:15,079 INFO L82 PathProgramCache]: Analyzing trace with hash -734842407, now seen corresponding path program 11 times [2020-09-11 16:03:15,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:15,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970160923] [2020-09-11 16:03:15,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 13 proven. 190 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-11 16:03:15,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970160923] [2020-09-11 16:03:15,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081477428] [2020-09-11 16:03:15,277 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 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 [2020-09-11 16:03:15,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-11 16:03:15,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:15,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:03:15,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 13 proven. 190 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-11 16:03:15,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:15,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:03:15,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071061059] [2020-09-11 16:03:15,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:03:15,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:15,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:03:15,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:03:15,412 INFO L87 Difference]: Start difference. First operand 478 states and 662 transitions. Second operand 14 states. [2020-09-11 16:03:15,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:15,484 INFO L93 Difference]: Finished difference Result 544 states and 748 transitions. [2020-09-11 16:03:15,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:03:15,484 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-09-11 16:03:15,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:15,487 INFO L225 Difference]: With dead ends: 544 [2020-09-11 16:03:15,487 INFO L226 Difference]: Without dead ends: 544 [2020-09-11 16:03:15,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:03:15,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2020-09-11 16:03:15,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 520. [2020-09-11 16:03:15,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-09-11 16:03:15,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 718 transitions. [2020-09-11 16:03:15,499 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 718 transitions. Word has length 63 [2020-09-11 16:03:15,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:15,499 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 718 transitions. [2020-09-11 16:03:15,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:03:15,500 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 718 transitions. [2020-09-11 16:03:15,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-11 16:03:15,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:15,502 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:15,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:15,710 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:15,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:15,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1524941881, now seen corresponding path program 12 times [2020-09-11 16:03:15,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:15,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652160121] [2020-09-11 16:03:15,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 13 proven. 231 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-09-11 16:03:15,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652160121] [2020-09-11 16:03:15,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287126699] [2020-09-11 16:03:15,961 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 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 [2020-09-11 16:03:16,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-11 16:03:16,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:16,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:03:16,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-09-11 16:03:16,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:16,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 20 [2020-09-11 16:03:16,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866265255] [2020-09-11 16:03:16,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:03:16,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:16,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:03:16,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:03:16,212 INFO L87 Difference]: Start difference. First operand 520 states and 718 transitions. Second operand 20 states. [2020-09-11 16:03:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:18,745 INFO L93 Difference]: Finished difference Result 700 states and 941 transitions. [2020-09-11 16:03:18,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-09-11 16:03:18,746 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2020-09-11 16:03:18,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:18,750 INFO L225 Difference]: With dead ends: 700 [2020-09-11 16:03:18,750 INFO L226 Difference]: Without dead ends: 700 [2020-09-11 16:03:18,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2622 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2548, Invalid=5824, Unknown=0, NotChecked=0, Total=8372 [2020-09-11 16:03:18,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2020-09-11 16:03:18,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 643. [2020-09-11 16:03:18,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-09-11 16:03:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 874 transitions. [2020-09-11 16:03:18,770 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 874 transitions. Word has length 67 [2020-09-11 16:03:18,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:18,771 INFO L479 AbstractCegarLoop]: Abstraction has 643 states and 874 transitions. [2020-09-11 16:03:18,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:03:18,771 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 874 transitions. [2020-09-11 16:03:18,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-11 16:03:18,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:18,773 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:18,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-11 16:03:18,989 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:18,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:18,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1171001041, now seen corresponding path program 13 times [2020-09-11 16:03:18,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:18,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738356539] [2020-09-11 16:03:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 16 proven. 276 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-11 16:03:19,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738356539] [2020-09-11 16:03:19,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846556409] [2020-09-11 16:03:19,278 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 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 [2020-09-11 16:03:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:19,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:03:19,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 16 proven. 276 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-11 16:03:19,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:19,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:03:19,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812498651] [2020-09-11 16:03:19,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:03:19,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:19,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:03:19,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:03:19,416 INFO L87 Difference]: Start difference. First operand 643 states and 874 transitions. Second operand 16 states. [2020-09-11 16:03:19,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:19,488 INFO L93 Difference]: Finished difference Result 718 states and 970 transitions. [2020-09-11 16:03:19,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:03:19,489 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 74 [2020-09-11 16:03:19,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:19,492 INFO L225 Difference]: With dead ends: 718 [2020-09-11 16:03:19,492 INFO L226 Difference]: Without dead ends: 718 [2020-09-11 16:03:19,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:03:19,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2020-09-11 16:03:19,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 691. [2020-09-11 16:03:19,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2020-09-11 16:03:19,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 937 transitions. [2020-09-11 16:03:19,508 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 937 transitions. Word has length 74 [2020-09-11 16:03:19,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:19,508 INFO L479 AbstractCegarLoop]: Abstraction has 691 states and 937 transitions. [2020-09-11 16:03:19,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:03:19,508 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 937 transitions. [2020-09-11 16:03:19,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-11 16:03:19,510 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:19,511 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:19,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-11 16:03:19,726 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:19,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:19,726 INFO L82 PathProgramCache]: Analyzing trace with hash 776210049, now seen corresponding path program 14 times [2020-09-11 16:03:19,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:19,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625523215] [2020-09-11 16:03:19,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 325 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-11 16:03:20,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625523215] [2020-09-11 16:03:20,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218902502] [2020-09-11 16:03:20,008 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 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 [2020-09-11 16:03:20,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:03:20,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:20,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:03:20,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 16 proven. 325 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-11 16:03:20,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:20,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:03:20,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117321945] [2020-09-11 16:03:20,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:03:20,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:20,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:03:20,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:03:20,151 INFO L87 Difference]: Start difference. First operand 691 states and 937 transitions. Second operand 17 states. [2020-09-11 16:03:20,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:20,233 INFO L93 Difference]: Finished difference Result 766 states and 1033 transitions. [2020-09-11 16:03:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:03:20,233 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 78 [2020-09-11 16:03:20,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:20,237 INFO L225 Difference]: With dead ends: 766 [2020-09-11 16:03:20,237 INFO L226 Difference]: Without dead ends: 766 [2020-09-11 16:03:20,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:03:20,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2020-09-11 16:03:20,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 739. [2020-09-11 16:03:20,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 739 states. [2020-09-11 16:03:20,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1000 transitions. [2020-09-11 16:03:20,254 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1000 transitions. Word has length 78 [2020-09-11 16:03:20,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:20,254 INFO L479 AbstractCegarLoop]: Abstraction has 739 states and 1000 transitions. [2020-09-11 16:03:20,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:03:20,255 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1000 transitions. [2020-09-11 16:03:20,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-11 16:03:20,257 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:20,257 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:20,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-11 16:03:20,472 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:20,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:20,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1187324627, now seen corresponding path program 15 times [2020-09-11 16:03:20,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:20,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060797875] [2020-09-11 16:03:20,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 16 proven. 378 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-11 16:03:20,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060797875] [2020-09-11 16:03:20,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129633634] [2020-09-11 16:03:20,797 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 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 [2020-09-11 16:03:20,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:03:20,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:20,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:03:20,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-09-11 16:03:21,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:21,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2020-09-11 16:03:21,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777531788] [2020-09-11 16:03:21,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 16:03:21,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:21,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 16:03:21,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-09-11 16:03:21,097 INFO L87 Difference]: Start difference. First operand 739 states and 1000 transitions. Second operand 24 states. [2020-09-11 16:03:25,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:25,556 INFO L93 Difference]: Finished difference Result 952 states and 1260 transitions. [2020-09-11 16:03:25,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-09-11 16:03:25,559 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-09-11 16:03:25,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:25,563 INFO L225 Difference]: With dead ends: 952 [2020-09-11 16:03:25,563 INFO L226 Difference]: Without dead ends: 952 [2020-09-11 16:03:25,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5558 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4896, Invalid=11616, Unknown=0, NotChecked=0, Total=16512 [2020-09-11 16:03:25,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2020-09-11 16:03:25,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 886. [2020-09-11 16:03:25,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2020-09-11 16:03:25,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1184 transitions. [2020-09-11 16:03:25,585 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1184 transitions. Word has length 82 [2020-09-11 16:03:25,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:25,585 INFO L479 AbstractCegarLoop]: Abstraction has 886 states and 1184 transitions. [2020-09-11 16:03:25,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 16:03:25,586 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1184 transitions. [2020-09-11 16:03:25,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-11 16:03:25,588 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:25,588 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:25,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:25,803 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:25,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:25,804 INFO L82 PathProgramCache]: Analyzing trace with hash -933866561, now seen corresponding path program 16 times [2020-09-11 16:03:25,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:25,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384911686] [2020-09-11 16:03:25,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 19 proven. 435 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-11 16:03:26,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384911686] [2020-09-11 16:03:26,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208041998] [2020-09-11 16:03:26,141 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 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 [2020-09-11 16:03:26,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:03:26,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:26,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:03:26,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 19 proven. 435 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-11 16:03:26,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:26,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:03:26,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760492829] [2020-09-11 16:03:26,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:03:26,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:26,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:03:26,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:03:26,758 INFO L87 Difference]: Start difference. First operand 886 states and 1184 transitions. Second operand 19 states. [2020-09-11 16:03:26,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:26,877 INFO L93 Difference]: Finished difference Result 970 states and 1290 transitions. [2020-09-11 16:03:26,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:03:26,878 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 89 [2020-09-11 16:03:26,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:26,884 INFO L225 Difference]: With dead ends: 970 [2020-09-11 16:03:26,884 INFO L226 Difference]: Without dead ends: 970 [2020-09-11 16:03:26,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:03:26,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-09-11 16:03:26,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 940. [2020-09-11 16:03:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 940 states. [2020-09-11 16:03:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1254 transitions. [2020-09-11 16:03:26,914 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1254 transitions. Word has length 89 [2020-09-11 16:03:26,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:26,914 INFO L479 AbstractCegarLoop]: Abstraction has 940 states and 1254 transitions. [2020-09-11 16:03:26,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:03:26,914 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1254 transitions. [2020-09-11 16:03:26,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-11 16:03:26,918 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:26,918 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:27,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-11 16:03:27,131 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:27,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:27,132 INFO L82 PathProgramCache]: Analyzing trace with hash -365776851, now seen corresponding path program 17 times [2020-09-11 16:03:27,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:27,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657289098] [2020-09-11 16:03:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:27,537 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 19 proven. 496 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-11 16:03:27,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657289098] [2020-09-11 16:03:27,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555379923] [2020-09-11 16:03:27,539 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 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 [2020-09-11 16:03:27,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-09-11 16:03:27,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:27,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:03:27,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 19 proven. 496 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-11 16:03:27,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:27,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:03:27,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510997266] [2020-09-11 16:03:27,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:03:27,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:27,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:03:27,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:03:27,889 INFO L87 Difference]: Start difference. First operand 940 states and 1254 transitions. Second operand 20 states. [2020-09-11 16:03:28,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:28,025 INFO L93 Difference]: Finished difference Result 1024 states and 1360 transitions. [2020-09-11 16:03:28,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:03:28,026 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2020-09-11 16:03:28,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:28,032 INFO L225 Difference]: With dead ends: 1024 [2020-09-11 16:03:28,032 INFO L226 Difference]: Without dead ends: 1024 [2020-09-11 16:03:28,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:03:28,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2020-09-11 16:03:28,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 994. [2020-09-11 16:03:28,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 994 states. [2020-09-11 16:03:28,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1324 transitions. [2020-09-11 16:03:28,059 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1324 transitions. Word has length 93 [2020-09-11 16:03:28,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:28,060 INFO L479 AbstractCegarLoop]: Abstraction has 994 states and 1324 transitions. [2020-09-11 16:03:28,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:03:28,060 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1324 transitions. [2020-09-11 16:03:28,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-11 16:03:28,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:28,065 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:28,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:28,278 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:28,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:28,279 INFO L82 PathProgramCache]: Analyzing trace with hash -728816229, now seen corresponding path program 18 times [2020-09-11 16:03:28,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:28,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123321585] [2020-09-11 16:03:28,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:28,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 19 proven. 561 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-09-11 16:03:28,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123321585] [2020-09-11 16:03:28,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542515800] [2020-09-11 16:03:28,752 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 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 [2020-09-11 16:03:29,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-11 16:03:29,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:29,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:03:29,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2020-09-11 16:03:29,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:29,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 28 [2020-09-11 16:03:29,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228835820] [2020-09-11 16:03:29,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-11 16:03:29,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:29,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-11 16:03:29,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-11 16:03:29,342 INFO L87 Difference]: Start difference. First operand 994 states and 1324 transitions. Second operand 28 states. [2020-09-11 16:03:36,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:36,981 INFO L93 Difference]: Finished difference Result 1240 states and 1621 transitions. [2020-09-11 16:03:36,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-09-11 16:03:36,982 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 97 [2020-09-11 16:03:36,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:36,987 INFO L225 Difference]: With dead ends: 1240 [2020-09-11 16:03:36,987 INFO L226 Difference]: Without dead ends: 1240 [2020-09-11 16:03:36,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10432 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=8550, Invalid=20862, Unknown=0, NotChecked=0, Total=29412 [2020-09-11 16:03:36,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2020-09-11 16:03:37,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1165. [2020-09-11 16:03:37,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1165 states. [2020-09-11 16:03:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1536 transitions. [2020-09-11 16:03:37,014 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1536 transitions. Word has length 97 [2020-09-11 16:03:37,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:37,014 INFO L479 AbstractCegarLoop]: Abstraction has 1165 states and 1536 transitions. [2020-09-11 16:03:37,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-11 16:03:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1536 transitions. [2020-09-11 16:03:37,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-11 16:03:37,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:37,018 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:37,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:37,234 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:37,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:37,234 INFO L82 PathProgramCache]: Analyzing trace with hash 110062427, now seen corresponding path program 19 times [2020-09-11 16:03:37,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:37,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510712709] [2020-09-11 16:03:37,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-11 16:03:37,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510712709] [2020-09-11 16:03:37,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76231033] [2020-09-11 16:03:37,631 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 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 [2020-09-11 16:03:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:37,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:03:37,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 22 proven. 630 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-11 16:03:37,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:37,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 16:03:37,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210306295] [2020-09-11 16:03:37,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:03:37,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:37,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:03:37,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:03:37,824 INFO L87 Difference]: Start difference. First operand 1165 states and 1536 transitions. Second operand 22 states. [2020-09-11 16:03:37,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:37,960 INFO L93 Difference]: Finished difference Result 1258 states and 1652 transitions. [2020-09-11 16:03:37,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:03:37,960 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 104 [2020-09-11 16:03:37,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:37,968 INFO L225 Difference]: With dead ends: 1258 [2020-09-11 16:03:37,968 INFO L226 Difference]: Without dead ends: 1258 [2020-09-11 16:03:37,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:03:37,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2020-09-11 16:03:37,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1225. [2020-09-11 16:03:37,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1225 states. [2020-09-11 16:03:37,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1613 transitions. [2020-09-11 16:03:37,999 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1613 transitions. Word has length 104 [2020-09-11 16:03:38,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:38,000 INFO L479 AbstractCegarLoop]: Abstraction has 1225 states and 1613 transitions. [2020-09-11 16:03:38,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:03:38,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1613 transitions. [2020-09-11 16:03:38,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-09-11 16:03:38,006 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:38,006 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:38,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-11 16:03:38,221 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:38,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:38,222 INFO L82 PathProgramCache]: Analyzing trace with hash -912464595, now seen corresponding path program 20 times [2020-09-11 16:03:38,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:38,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844195678] [2020-09-11 16:03:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 22 proven. 703 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-11 16:03:38,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844195678] [2020-09-11 16:03:38,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983147582] [2020-09-11 16:03:38,811 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 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 [2020-09-11 16:03:38,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:03:38,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:38,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:03:38,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:39,075 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 22 proven. 703 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-09-11 16:03:39,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:39,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-11 16:03:39,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393577474] [2020-09-11 16:03:39,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:03:39,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:39,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:03:39,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:03:39,078 INFO L87 Difference]: Start difference. First operand 1225 states and 1613 transitions. Second operand 23 states. [2020-09-11 16:03:39,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:39,215 INFO L93 Difference]: Finished difference Result 1285 states and 1690 transitions. [2020-09-11 16:03:39,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:03:39,216 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 108 [2020-09-11 16:03:39,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:39,224 INFO L225 Difference]: With dead ends: 1285 [2020-09-11 16:03:39,224 INFO L226 Difference]: Without dead ends: 1285 [2020-09-11 16:03:39,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:03:39,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2020-09-11 16:03:39,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1285. [2020-09-11 16:03:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1285 states. [2020-09-11 16:03:39,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1690 transitions. [2020-09-11 16:03:39,255 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1690 transitions. Word has length 108 [2020-09-11 16:03:39,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:39,256 INFO L479 AbstractCegarLoop]: Abstraction has 1285 states and 1690 transitions. [2020-09-11 16:03:39,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:03:39,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1690 transitions. [2020-09-11 16:03:39,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-11 16:03:39,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:39,262 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:39,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:39,476 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:39,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:39,477 INFO L82 PathProgramCache]: Analyzing trace with hash -220912129, now seen corresponding path program 21 times [2020-09-11 16:03:39,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:39,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321296721] [2020-09-11 16:03:39,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:39,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321296721] [2020-09-11 16:03:39,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528513540] [2020-09-11 16:03:39,781 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 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 [2020-09-11 16:03:39,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 16:03:39,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:39,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:03:39,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:39,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:39,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:03:39,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925971757] [2020-09-11 16:03:39,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:03:39,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:39,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:03:39,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:03:39,985 INFO L87 Difference]: Start difference. First operand 1285 states and 1690 transitions. Second operand 12 states. [2020-09-11 16:03:40,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:40,040 INFO L93 Difference]: Finished difference Result 1460 states and 1896 transitions. [2020-09-11 16:03:40,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:03:40,040 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 112 [2020-09-11 16:03:40,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:40,046 INFO L225 Difference]: With dead ends: 1460 [2020-09-11 16:03:40,046 INFO L226 Difference]: Without dead ends: 1460 [2020-09-11 16:03:40,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:03:40,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-09-11 16:03:40,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1414. [2020-09-11 16:03:40,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1414 states. [2020-09-11 16:03:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1846 transitions. [2020-09-11 16:03:40,070 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1846 transitions. Word has length 112 [2020-09-11 16:03:40,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:40,071 INFO L479 AbstractCegarLoop]: Abstraction has 1414 states and 1846 transitions. [2020-09-11 16:03:40,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:03:40,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1846 transitions. [2020-09-11 16:03:40,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-11 16:03:40,075 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:40,076 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:40,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-11 16:03:40,292 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:40,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:40,292 INFO L82 PathProgramCache]: Analyzing trace with hash 2018487717, now seen corresponding path program 22 times [2020-09-11 16:03:40,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:40,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555894243] [2020-09-11 16:03:40,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:40,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555894243] [2020-09-11 16:03:40,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992806272] [2020-09-11 16:03:40,616 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 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 [2020-09-11 16:03:41,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:03:41,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:41,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:03:41,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:41,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:41,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 16:03:41,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140102313] [2020-09-11 16:03:41,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:03:41,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:41,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:03:41,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:03:41,511 INFO L87 Difference]: Start difference. First operand 1414 states and 1846 transitions. Second operand 13 states. [2020-09-11 16:03:41,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:41,600 INFO L93 Difference]: Finished difference Result 1589 states and 2052 transitions. [2020-09-11 16:03:41,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 16:03:41,601 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 115 [2020-09-11 16:03:41,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:41,607 INFO L225 Difference]: With dead ends: 1589 [2020-09-11 16:03:41,607 INFO L226 Difference]: Without dead ends: 1589 [2020-09-11 16:03:41,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:03:41,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2020-09-11 16:03:41,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1543. [2020-09-11 16:03:41,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-09-11 16:03:41,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2002 transitions. [2020-09-11 16:03:41,630 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2002 transitions. Word has length 115 [2020-09-11 16:03:41,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:41,630 INFO L479 AbstractCegarLoop]: Abstraction has 1543 states and 2002 transitions. [2020-09-11 16:03:41,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:03:41,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2002 transitions. [2020-09-11 16:03:41,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-09-11 16:03:41,636 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:41,636 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:41,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-11 16:03:41,853 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:41,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:41,853 INFO L82 PathProgramCache]: Analyzing trace with hash -2042676161, now seen corresponding path program 23 times [2020-09-11 16:03:41,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:41,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722728073] [2020-09-11 16:03:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:42,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722728073] [2020-09-11 16:03:42,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948808518] [2020-09-11 16:03:42,244 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 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 [2020-09-11 16:03:42,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-11 16:03:42,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:42,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:03:42,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:42,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:42,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 16:03:42,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328669065] [2020-09-11 16:03:42,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 16:03:42,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:42,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 16:03:42,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:03:42,736 INFO L87 Difference]: Start difference. First operand 1543 states and 2002 transitions. Second operand 14 states. [2020-09-11 16:03:42,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:42,838 INFO L93 Difference]: Finished difference Result 1718 states and 2208 transitions. [2020-09-11 16:03:42,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 16:03:42,839 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 118 [2020-09-11 16:03:42,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:42,849 INFO L225 Difference]: With dead ends: 1718 [2020-09-11 16:03:42,849 INFO L226 Difference]: Without dead ends: 1718 [2020-09-11 16:03:42,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-09-11 16:03:42,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2020-09-11 16:03:42,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1672. [2020-09-11 16:03:42,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2020-09-11 16:03:42,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2158 transitions. [2020-09-11 16:03:42,890 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2158 transitions. Word has length 118 [2020-09-11 16:03:42,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:42,891 INFO L479 AbstractCegarLoop]: Abstraction has 1672 states and 2158 transitions. [2020-09-11 16:03:42,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 16:03:42,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2158 transitions. [2020-09-11 16:03:42,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-11 16:03:42,899 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:42,899 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:43,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:43,114 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:43,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:43,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1052962661, now seen corresponding path program 24 times [2020-09-11 16:03:43,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:43,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64625358] [2020-09-11 16:03:43,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:43,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64625358] [2020-09-11 16:03:43,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751183432] [2020-09-11 16:03:43,549 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 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 [2020-09-11 16:03:44,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-09-11 16:03:44,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:44,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:03:44,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:44,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:44,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 16:03:44,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109179134] [2020-09-11 16:03:44,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:03:44,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:44,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:03:44,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:03:44,273 INFO L87 Difference]: Start difference. First operand 1672 states and 2158 transitions. Second operand 15 states. [2020-09-11 16:03:44,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:44,381 INFO L93 Difference]: Finished difference Result 1847 states and 2364 transitions. [2020-09-11 16:03:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 16:03:44,382 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2020-09-11 16:03:44,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:44,389 INFO L225 Difference]: With dead ends: 1847 [2020-09-11 16:03:44,389 INFO L226 Difference]: Without dead ends: 1847 [2020-09-11 16:03:44,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:03:44,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2020-09-11 16:03:44,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1801. [2020-09-11 16:03:44,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1801 states. [2020-09-11 16:03:44,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2314 transitions. [2020-09-11 16:03:44,422 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2314 transitions. Word has length 121 [2020-09-11 16:03:44,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:44,423 INFO L479 AbstractCegarLoop]: Abstraction has 1801 states and 2314 transitions. [2020-09-11 16:03:44,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:03:44,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2314 transitions. [2020-09-11 16:03:44,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-09-11 16:03:44,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:44,431 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:44,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-11 16:03:44,645 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:44,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:44,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1691329151, now seen corresponding path program 25 times [2020-09-11 16:03:44,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:44,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379880300] [2020-09-11 16:03:44,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:45,063 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:45,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379880300] [2020-09-11 16:03:45,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017236334] [2020-09-11 16:03:45,063 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:45,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:03:45,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:45,248 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:45,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:45,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 16:03:45,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420571390] [2020-09-11 16:03:45,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 16:03:45,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:45,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 16:03:45,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:03:45,252 INFO L87 Difference]: Start difference. First operand 1801 states and 2314 transitions. Second operand 16 states. [2020-09-11 16:03:45,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:45,366 INFO L93 Difference]: Finished difference Result 1976 states and 2520 transitions. [2020-09-11 16:03:45,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 16:03:45,366 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 124 [2020-09-11 16:03:45,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:45,375 INFO L225 Difference]: With dead ends: 1976 [2020-09-11 16:03:45,376 INFO L226 Difference]: Without dead ends: 1976 [2020-09-11 16:03:45,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-09-11 16:03:45,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2020-09-11 16:03:45,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2020-09-11 16:03:45,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2020-09-11 16:03:45,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2470 transitions. [2020-09-11 16:03:45,417 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2470 transitions. Word has length 124 [2020-09-11 16:03:45,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:45,417 INFO L479 AbstractCegarLoop]: Abstraction has 1930 states and 2470 transitions. [2020-09-11 16:03:45,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 16:03:45,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2470 transitions. [2020-09-11 16:03:45,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-11 16:03:45,423 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:45,423 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:45,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:45,637 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:45,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:45,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1152246053, now seen corresponding path program 26 times [2020-09-11 16:03:45,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:45,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920160487] [2020-09-11 16:03:45,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:46,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920160487] [2020-09-11 16:03:46,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794065164] [2020-09-11 16:03:46,127 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:46,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:03:46,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:46,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:03:46,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:46,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:46,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:03:46,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025398219] [2020-09-11 16:03:46,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:03:46,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:46,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:03:46,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:03:46,391 INFO L87 Difference]: Start difference. First operand 1930 states and 2470 transitions. Second operand 17 states. [2020-09-11 16:03:46,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:46,508 INFO L93 Difference]: Finished difference Result 2105 states and 2676 transitions. [2020-09-11 16:03:46,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:03:46,509 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 127 [2020-09-11 16:03:46,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:46,521 INFO L225 Difference]: With dead ends: 2105 [2020-09-11 16:03:46,521 INFO L226 Difference]: Without dead ends: 2105 [2020-09-11 16:03:46,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:03:46,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2020-09-11 16:03:46,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2059. [2020-09-11 16:03:46,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2059 states. [2020-09-11 16:03:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 2626 transitions. [2020-09-11 16:03:46,566 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 2626 transitions. Word has length 127 [2020-09-11 16:03:46,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:46,566 INFO L479 AbstractCegarLoop]: Abstraction has 2059 states and 2626 transitions. [2020-09-11 16:03:46,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:03:46,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 2626 transitions. [2020-09-11 16:03:46,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-09-11 16:03:46,572 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:46,572 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:46,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-11 16:03:46,787 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:46,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:46,788 INFO L82 PathProgramCache]: Analyzing trace with hash 210393279, now seen corresponding path program 27 times [2020-09-11 16:03:46,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:46,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102164593] [2020-09-11 16:03:46,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:47,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102164593] [2020-09-11 16:03:47,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390265277] [2020-09-11 16:03:47,327 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:47,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-09-11 16:03:47,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:47,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:03:47,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:48,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:48,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:03:48,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527388194] [2020-09-11 16:03:48,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:03:48,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:48,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:03:48,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:03:48,028 INFO L87 Difference]: Start difference. First operand 2059 states and 2626 transitions. Second operand 18 states. [2020-09-11 16:03:48,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:48,155 INFO L93 Difference]: Finished difference Result 2234 states and 2832 transitions. [2020-09-11 16:03:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:03:48,156 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 130 [2020-09-11 16:03:48,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:48,165 INFO L225 Difference]: With dead ends: 2234 [2020-09-11 16:03:48,166 INFO L226 Difference]: Without dead ends: 2234 [2020-09-11 16:03:48,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:03:48,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2020-09-11 16:03:48,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2188. [2020-09-11 16:03:48,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2188 states. [2020-09-11 16:03:48,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2782 transitions. [2020-09-11 16:03:48,208 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2782 transitions. Word has length 130 [2020-09-11 16:03:48,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:48,209 INFO L479 AbstractCegarLoop]: Abstraction has 2188 states and 2782 transitions. [2020-09-11 16:03:48,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:03:48,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2782 transitions. [2020-09-11 16:03:48,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-11 16:03:48,216 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:48,216 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:48,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-11 16:03:48,431 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:48,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:48,432 INFO L82 PathProgramCache]: Analyzing trace with hash 495747813, now seen corresponding path program 28 times [2020-09-11 16:03:48,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:48,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450179850] [2020-09-11 16:03:48,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:48,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450179850] [2020-09-11 16:03:48,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847697260] [2020-09-11 16:03:48,917 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:50,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:03:50,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:50,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 16:03:50,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:50,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:50,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 16:03:50,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22024078] [2020-09-11 16:03:50,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:03:50,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:50,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:03:50,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:03:50,861 INFO L87 Difference]: Start difference. First operand 2188 states and 2782 transitions. Second operand 19 states. [2020-09-11 16:03:50,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:50,972 INFO L93 Difference]: Finished difference Result 2363 states and 2988 transitions. [2020-09-11 16:03:50,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 16:03:50,972 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 133 [2020-09-11 16:03:50,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:50,982 INFO L225 Difference]: With dead ends: 2363 [2020-09-11 16:03:50,982 INFO L226 Difference]: Without dead ends: 2363 [2020-09-11 16:03:50,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:03:50,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2020-09-11 16:03:51,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2317. [2020-09-11 16:03:51,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2020-09-11 16:03:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2938 transitions. [2020-09-11 16:03:51,020 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2938 transitions. Word has length 133 [2020-09-11 16:03:51,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:51,020 INFO L479 AbstractCegarLoop]: Abstraction has 2317 states and 2938 transitions. [2020-09-11 16:03:51,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:03:51,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2938 transitions. [2020-09-11 16:03:51,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-11 16:03:51,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:51,027 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:51,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:51,242 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:51,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:51,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1752391423, now seen corresponding path program 29 times [2020-09-11 16:03:51,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:51,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94602831] [2020-09-11 16:03:51,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:51,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:51,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94602831] [2020-09-11 16:03:51,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750700435] [2020-09-11 16:03:51,701 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:51,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-09-11 16:03:51,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:51,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:03:51,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:52,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:52,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:03:52,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633979662] [2020-09-11 16:03:52,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:03:52,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:52,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:03:52,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:03:52,039 INFO L87 Difference]: Start difference. First operand 2317 states and 2938 transitions. Second operand 20 states. [2020-09-11 16:03:52,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:52,184 INFO L93 Difference]: Finished difference Result 2492 states and 3144 transitions. [2020-09-11 16:03:52,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:03:52,184 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2020-09-11 16:03:52,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:52,193 INFO L225 Difference]: With dead ends: 2492 [2020-09-11 16:03:52,193 INFO L226 Difference]: Without dead ends: 2492 [2020-09-11 16:03:52,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:03:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2020-09-11 16:03:52,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2446. [2020-09-11 16:03:52,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2020-09-11 16:03:52,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3094 transitions. [2020-09-11 16:03:52,229 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3094 transitions. Word has length 136 [2020-09-11 16:03:52,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:52,230 INFO L479 AbstractCegarLoop]: Abstraction has 2446 states and 3094 transitions. [2020-09-11 16:03:52,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:03:52,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3094 transitions. [2020-09-11 16:03:52,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-11 16:03:52,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:52,235 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:52,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:52,449 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:52,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:52,450 INFO L82 PathProgramCache]: Analyzing trace with hash -807742299, now seen corresponding path program 30 times [2020-09-11 16:03:52,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:52,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427242375] [2020-09-11 16:03:52,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:52,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427242375] [2020-09-11 16:03:52,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003204843] [2020-09-11 16:03:52,924 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:53,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-09-11 16:03:53,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:53,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 16:03:53,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:53,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:53,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 16:03:53,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710758103] [2020-09-11 16:03:53,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:03:53,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:53,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:03:53,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:03:53,545 INFO L87 Difference]: Start difference. First operand 2446 states and 3094 transitions. Second operand 21 states. [2020-09-11 16:03:53,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:53,636 INFO L93 Difference]: Finished difference Result 2621 states and 3300 transitions. [2020-09-11 16:03:53,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 16:03:53,637 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 139 [2020-09-11 16:03:53,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:53,643 INFO L225 Difference]: With dead ends: 2621 [2020-09-11 16:03:53,643 INFO L226 Difference]: Without dead ends: 2621 [2020-09-11 16:03:53,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:03:53,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2020-09-11 16:03:53,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2575. [2020-09-11 16:03:53,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2575 states. [2020-09-11 16:03:53,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 3250 transitions. [2020-09-11 16:03:53,678 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 3250 transitions. Word has length 139 [2020-09-11 16:03:53,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:53,679 INFO L479 AbstractCegarLoop]: Abstraction has 2575 states and 3250 transitions. [2020-09-11 16:03:53,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:03:53,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 3250 transitions. [2020-09-11 16:03:53,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-09-11 16:03:53,685 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:53,685 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:53,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-11 16:03:53,899 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:53,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:53,900 INFO L82 PathProgramCache]: Analyzing trace with hash 277787967, now seen corresponding path program 31 times [2020-09-11 16:03:53,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:53,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169609232] [2020-09-11 16:03:53,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:54,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169609232] [2020-09-11 16:03:54,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336777380] [2020-09-11 16:03:54,536 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:54,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 16:03:54,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:54,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:54,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:54,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 16:03:54,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642704236] [2020-09-11 16:03:54,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 16:03:54,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:54,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 16:03:54,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:03:54,772 INFO L87 Difference]: Start difference. First operand 2575 states and 3250 transitions. Second operand 22 states. [2020-09-11 16:03:54,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:54,914 INFO L93 Difference]: Finished difference Result 2750 states and 3456 transitions. [2020-09-11 16:03:54,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:03:54,915 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 142 [2020-09-11 16:03:54,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:54,919 INFO L225 Difference]: With dead ends: 2750 [2020-09-11 16:03:54,919 INFO L226 Difference]: Without dead ends: 2750 [2020-09-11 16:03:54,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-09-11 16:03:54,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2020-09-11 16:03:54,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2704. [2020-09-11 16:03:54,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2704 states. [2020-09-11 16:03:54,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3406 transitions. [2020-09-11 16:03:54,954 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3406 transitions. Word has length 142 [2020-09-11 16:03:54,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:54,954 INFO L479 AbstractCegarLoop]: Abstraction has 2704 states and 3406 transitions. [2020-09-11 16:03:54,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 16:03:54,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3406 transitions. [2020-09-11 16:03:54,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-11 16:03:54,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:54,961 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:55,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:55,174 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:55,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:55,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1793796507, now seen corresponding path program 32 times [2020-09-11 16:03:55,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:55,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248111434] [2020-09-11 16:03:55,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:55,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248111434] [2020-09-11 16:03:55,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101982365] [2020-09-11 16:03:55,707 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:55,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:03:55,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:55,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:03:55,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2020-09-11 16:03:55,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:55,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-11 16:03:55,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065861766] [2020-09-11 16:03:55,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:03:55,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:55,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:03:55,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:03:55,900 INFO L87 Difference]: Start difference. First operand 2704 states and 3406 transitions. Second operand 23 states. [2020-09-11 16:03:56,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:56,033 INFO L93 Difference]: Finished difference Result 2833 states and 3562 transitions. [2020-09-11 16:03:56,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:03:56,034 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 145 [2020-09-11 16:03:56,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:56,039 INFO L225 Difference]: With dead ends: 2833 [2020-09-11 16:03:56,039 INFO L226 Difference]: Without dead ends: 2833 [2020-09-11 16:03:56,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:03:56,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2020-09-11 16:03:56,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2833. [2020-09-11 16:03:56,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2833 states. [2020-09-11 16:03:56,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 3562 transitions. [2020-09-11 16:03:56,071 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 3562 transitions. Word has length 145 [2020-09-11 16:03:56,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:56,071 INFO L479 AbstractCegarLoop]: Abstraction has 2833 states and 3562 transitions. [2020-09-11 16:03:56,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:03:56,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 3562 transitions. [2020-09-11 16:03:56,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-11 16:03:56,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:56,077 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:56,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-11 16:03:56,292 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:56,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:56,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1981785217, now seen corresponding path program 33 times [2020-09-11 16:03:56,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:56,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285953862] [2020-09-11 16:03:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:03:59,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285953862] [2020-09-11 16:03:59,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87291963] [2020-09-11 16:03:59,936 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:04:00,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-09-11 16:04:00,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:04:00,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-11 16:04:00,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:04:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:04:00,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:04:00,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-11 16:04:00,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551655117] [2020-09-11 16:04:00,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-11 16:04:00,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:04:00,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-11 16:04:00,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-11 16:04:00,858 INFO L87 Difference]: Start difference. First operand 2833 states and 3562 transitions. Second operand 63 states. [2020-09-11 16:05:39,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:05:39,089 INFO L93 Difference]: Finished difference Result 32926 states and 45933 transitions. [2020-09-11 16:05:39,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2020-09-11 16:05:39,090 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-09-11 16:05:39,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:05:39,142 INFO L225 Difference]: With dead ends: 32926 [2020-09-11 16:05:39,143 INFO L226 Difference]: Without dead ends: 32924 [2020-09-11 16:05:39,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 632 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162735 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=2407, Invalid=398915, Unknown=0, NotChecked=0, Total=401322 [2020-09-11 16:05:39,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32924 states. [2020-09-11 16:05:39,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32924 to 2967. [2020-09-11 16:05:39,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2967 states. [2020-09-11 16:05:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 3794 transitions. [2020-09-11 16:05:39,380 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 3794 transitions. Word has length 148 [2020-09-11 16:05:39,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:05:39,380 INFO L479 AbstractCegarLoop]: Abstraction has 2967 states and 3794 transitions. [2020-09-11 16:05:39,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-11 16:05:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 3794 transitions. [2020-09-11 16:05:39,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-11 16:05:39,387 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:05:39,388 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:05:39,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-09-11 16:05:39,601 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:05:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:05:39,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1970430061, now seen corresponding path program 34 times [2020-09-11 16:05:39,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:05:39,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841545409] [2020-09-11 16:05:39,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:05:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:05:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:05:43,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841545409] [2020-09-11 16:05:43,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892665736] [2020-09-11 16:05:43,499 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:05:45,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:05:45,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:05:45,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2020-09-11 16:05:45,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:05:45,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:05:45,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:05:45,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-09-11 16:05:45,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637759297] [2020-09-11 16:05:45,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-11 16:05:45,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:05:45,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-11 16:05:45,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-09-11 16:05:45,725 INFO L87 Difference]: Start difference. First operand 2967 states and 3794 transitions. Second operand 63 states. Received shutdown request... [2020-09-11 16:06:44,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 356 states. [2020-09-11 16:06:44,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-11 16:06:44,352 WARN L544 AbstractCegarLoop]: Verification canceled [2020-09-11 16:06:44,359 WARN L228 ceAbstractionStarter]: Timeout [2020-09-11 16:06:44,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 04:06:44 BasicIcfg [2020-09-11 16:06:44,359 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 16:06:44,361 INFO L168 Benchmark]: Toolchain (without parser) took 222972.73 ms. Allocated memory was 142.6 MB in the beginning and 974.7 MB in the end (delta: 832.0 MB). Free memory was 101.8 MB in the beginning and 691.1 MB in the end (delta: -589.3 MB). Peak memory consumption was 242.7 MB. Max. memory is 7.1 GB. [2020-09-11 16:06:44,362 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 142.6 MB. Free memory was 122.9 MB in the beginning and 122.5 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-09-11 16:06:44,362 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1140.19 ms. Allocated memory was 142.6 MB in the beginning and 204.5 MB in the end (delta: 61.9 MB). Free memory was 101.0 MB in the beginning and 108.2 MB in the end (delta: -7.3 MB). Peak memory consumption was 59.8 MB. Max. memory is 7.1 GB. [2020-09-11 16:06:44,363 INFO L168 Benchmark]: Boogie Procedure Inliner took 105.99 ms. Allocated memory is still 204.5 MB. Free memory was 108.2 MB in the beginning and 105.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-11 16:06:44,363 INFO L168 Benchmark]: Boogie Preprocessor took 34.41 ms. Allocated memory is still 204.5 MB. Free memory was 105.5 MB in the beginning and 104.6 MB in the end (delta: 911.0 kB). Peak memory consumption was 911.0 kB. Max. memory is 7.1 GB. [2020-09-11 16:06:44,363 INFO L168 Benchmark]: RCFGBuilder took 548.46 ms. Allocated memory was 204.5 MB in the beginning and 233.8 MB in the end (delta: 29.4 MB). Free memory was 103.7 MB in the beginning and 188.2 MB in the end (delta: -84.5 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-09-11 16:06:44,364 INFO L168 Benchmark]: TraceAbstraction took 221131.21 ms. Allocated memory was 233.8 MB in the beginning and 974.7 MB in the end (delta: 740.8 MB). Free memory was 186.6 MB in the beginning and 691.1 MB in the end (delta: -504.5 MB). Peak memory consumption was 236.3 MB. Max. memory is 7.1 GB. [2020-09-11 16:06:44,366 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 142.6 MB. Free memory was 122.9 MB in the beginning and 122.5 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1140.19 ms. Allocated memory was 142.6 MB in the beginning and 204.5 MB in the end (delta: 61.9 MB). Free memory was 101.0 MB in the beginning and 108.2 MB in the end (delta: -7.3 MB). Peak memory consumption was 59.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 105.99 ms. Allocated memory is still 204.5 MB. Free memory was 108.2 MB in the beginning and 105.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.41 ms. Allocated memory is still 204.5 MB. Free memory was 105.5 MB in the beginning and 104.6 MB in the end (delta: 911.0 kB). Peak memory consumption was 911.0 kB. Max. memory is 7.1 GB. * RCFGBuilder took 548.46 ms. Allocated memory was 204.5 MB in the beginning and 233.8 MB in the end (delta: 29.4 MB). Free memory was 103.7 MB in the beginning and 188.2 MB in the end (delta: -84.5 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 221131.21 ms. Allocated memory was 233.8 MB in the beginning and 974.7 MB in the end (delta: 740.8 MB). Free memory was 186.6 MB in the beginning and 691.1 MB in the end (delta: -504.5 MB). Peak memory consumption was 236.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 3.3s, 78 ProgramPointsBefore, 19 ProgramPointsAfterwards, 81 TransitionsBefore, 17 TransitionsAfterwards, 646 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 323 VarBasedMoverChecksPositive, 14 VarBasedMoverChecksNegative, 5 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 738 CheckedPairsTotal, 70 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while BasicCegarLoop was constructing difference of abstraction (2967states) and FLOYD_HOARE automaton (currently 356 states, 63 states before enhancement),while ReachableStatesComputation was computing reachable states (12290 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 75 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 220.9s, OverallIterations: 36, TraceHistogramMax: 20, AutomataDifference: 176.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.4s, HoareTripleCheckerStatistics: 4155 SDtfs, 11012 SDslu, 210445 SDs, 0 SdLazy, 121763 SolverSat, 2105 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 76.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5277 GetRequests, 3407 SyntacticMatches, 4 SemanticMatches, 1866 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235913 ImplicationChecksByTransitivity, 81.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2967occurred in iteration=35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 35 MinimizatonAttempts, 31106 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 11.0s SatisfiabilityAnalysisTime, 18.2s InterpolantComputationTime, 6098 NumberOfCodeBlocks, 5843 NumberOfCodeBlocksAsserted, 292 NumberOfCheckSat, 6029 ConstructedInterpolants, 0 QuantifiedInterpolants, 2179807 SizeOfPredicates, 111 NumberOfNonLiveVariables, 11271 ConjunctsInSsa, 710 ConjunctsInUnsatCore, 69 InterpolantComputations, 3 PerfectInterpolantSequences, 21389/42051 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown