/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 16:02:08,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 16:02:08,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 16:02:08,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-12 16:02:08,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-12 16:02:08,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-12 16:02:08,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-12 16:02:08,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-12 16:02:08,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-12 16:02:08,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-12 16:02:08,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-12 16:02:08,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-12 16:02:08,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-12 16:02:08,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-12 16:02:08,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-12 16:02:08,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-12 16:02:08,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-12 16:02:08,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-12 16:02:08,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-12 16:02:08,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-12 16:02:08,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-12 16:02:08,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-12 16:02:08,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-12 16:02:08,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-12 16:02:08,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-12 16:02:08,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-12 16:02:08,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-12 16:02:08,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-12 16:02:08,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-12 16:02:08,543 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-12 16:02:08,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-12 16:02:08,543 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-12 16:02:08,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-12 16:02:08,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-12 16:02:08,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-12 16:02:08,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-12 16:02:08,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-12 16:02:08,550 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-12 16:02:08,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-12 16:02:08,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-12 16:02:08,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-12 16:02:08,555 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-12 16:02:08,584 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 16:02:08,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 16:02:08,584 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 16:02:08,584 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 16:02:08,587 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 16:02:08,587 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 16:02:08,587 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 16:02:08,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 16:02:08,587 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 16:02:08,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 16:02:08,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 16:02:08,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 16:02:08,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 16:02:08,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 16:02:08,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 16:02:08,588 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 16:02:08,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 16:02:08,588 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 16:02:08,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 16:02:08,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 16:02:08,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 16:02:08,589 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 16:02:08,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 16:02:08,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 16:02:08,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 16:02:08,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 16:02:08,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 16:02:08,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 16:02:08,589 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 16:02:08,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 16:02:08,590 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 16:02:08,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 16:02:08,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 16:02:08,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 16:02:08,859 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-12 16:02:08,860 INFO L275 PluginConnector]: CDTParser initialized [2021-08-12 16:02:08,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2021-08-12 16:02:08,918 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1f7fd869/cad24044ca634411a4da547fd5796f04/FLAG62d52e9a7 [2021-08-12 16:02:09,351 INFO L306 CDTParser]: Found 1 translation units. [2021-08-12 16:02:09,352 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2021-08-12 16:02:09,360 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1f7fd869/cad24044ca634411a4da547fd5796f04/FLAG62d52e9a7 [2021-08-12 16:02:09,374 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1f7fd869/cad24044ca634411a4da547fd5796f04 [2021-08-12 16:02:09,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 16:02:09,380 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-12 16:02:09,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-12 16:02:09,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-12 16:02:09,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-12 16:02:09,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.08 04:02:09" (1/1) ... [2021-08-12 16:02:09,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c174d84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:09, skipping insertion in model container [2021-08-12 16:02:09,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.08 04:02:09" (1/1) ... [2021-08-12 16:02:09,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-12 16:02:09,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-12 16:02:09,702 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i[30950,30963] [2021-08-12 16:02:09,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-12 16:02:09,711 INFO L203 MainTranslator]: Completed pre-run [2021-08-12 16:02:09,742 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i[30950,30963] [2021-08-12 16:02:09,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-12 16:02:09,807 INFO L208 MainTranslator]: Completed translation [2021-08-12 16:02:09,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:09 WrapperNode [2021-08-12 16:02:09,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-12 16:02:09,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 16:02:09,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 16:02:09,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 16:02:09,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:09" (1/1) ... [2021-08-12 16:02:09,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:09" (1/1) ... [2021-08-12 16:02:09,837 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 16:02:09,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 16:02:09,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 16:02:09,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 16:02:09,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:09" (1/1) ... [2021-08-12 16:02:09,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:09" (1/1) ... [2021-08-12 16:02:09,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:09" (1/1) ... [2021-08-12 16:02:09,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:09" (1/1) ... [2021-08-12 16:02:09,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:09" (1/1) ... [2021-08-12 16:02:09,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:09" (1/1) ... [2021-08-12 16:02:09,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:09" (1/1) ... [2021-08-12 16:02:09,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 16:02:09,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 16:02:09,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 16:02:09,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 16:02:09,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 16:02:09,897 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-08-12 16:02:09,897 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-08-12 16:02:09,897 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-08-12 16:02:09,897 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-08-12 16:02:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-12 16:02:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-08-12 16:02:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-12 16:02:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-12 16:02:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-12 16:02:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-08-12 16:02:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 16:02:09,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 16:02:09,900 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 16:02:10,133 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 16:02:10,134 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-12 16:02:10,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 04:02:10 BoogieIcfgContainer [2021-08-12 16:02:10,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 16:02:10,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 16:02:10,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 16:02:10,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 16:02:10,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.08 04:02:09" (1/3) ... [2021-08-12 16:02:10,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db5cd10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 04:02:10, skipping insertion in model container [2021-08-12 16:02:10,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:09" (2/3) ... [2021-08-12 16:02:10,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4db5cd10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 04:02:10, skipping insertion in model container [2021-08-12 16:02:10,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 04:02:10" (3/3) ... [2021-08-12 16:02:10,139 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2021-08-12 16:02:10,143 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 16:02:10,143 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 16:02:10,144 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 16:02:10,163 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,163 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,163 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,163 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,164 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,164 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,164 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,164 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,164 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,164 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,164 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,165 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,165 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,165 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,165 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,165 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,165 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,165 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,165 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,166 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,166 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,166 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,166 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,166 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,166 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,166 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,166 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,166 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,167 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,167 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,167 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,167 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,167 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,167 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,167 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,167 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,167 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,168 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,168 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,168 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,168 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,168 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,168 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,168 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,168 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,168 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,169 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,169 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,169 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,169 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,169 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,169 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,169 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,169 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,170 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,170 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,171 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,171 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,171 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,171 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,171 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,172 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,175 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,175 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,176 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,176 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,176 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,176 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:10,177 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 16:02:10,191 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-12 16:02:10,203 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 16:02:10,203 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 16:02:10,203 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 16:02:10,203 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 16:02:10,203 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 16:02:10,204 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 16:02:10,204 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 16:02:10,204 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 16:02:10,209 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-08-12 16:02:10,262 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:10,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:10,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 16:02:10,278 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:10,279 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:10,279 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:10,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:10,284 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-08-12 16:02:10,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:10,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243315259] [2021-08-12 16:02:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:10,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:10,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243315259] [2021-08-12 16:02:10,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243315259] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:02:10,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 16:02:10,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 16:02:10,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778778682] [2021-08-12 16:02:10,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 16:02:10,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:10,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 16:02:10,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-12 16:02:10,574 INFO L87 Difference]: Start difference. First operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:10,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:10,807 INFO L93 Difference]: Finished difference Result 4840 states and 15487 transitions. [2021-08-12 16:02:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 16:02:10,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 16:02:10,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:10,825 INFO L225 Difference]: With dead ends: 4840 [2021-08-12 16:02:10,825 INFO L226 Difference]: Without dead ends: 1242 [2021-08-12 16:02:10,868 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-12 16:02:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-08-12 16:02:10,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 942. [2021-08-12 16:02:10,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 2.7077577045696066) internal successors, (2548), 941 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:10,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2548 transitions. [2021-08-12 16:02:10,958 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2548 transitions. Word has length 32 [2021-08-12 16:02:10,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:10,959 INFO L482 AbstractCegarLoop]: Abstraction has 942 states and 2548 transitions. [2021-08-12 16:02:10,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:10,959 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2548 transitions. [2021-08-12 16:02:10,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 16:02:10,964 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:10,964 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:10,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 16:02:10,964 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:10,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:10,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1720134605, now seen corresponding path program 1 times [2021-08-12 16:02:10,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:10,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063822070] [2021-08-12 16:02:10,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:11,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:11,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063822070] [2021-08-12 16:02:11,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063822070] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:02:11,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 16:02:11,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 16:02:11,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963385269] [2021-08-12 16:02:11,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 16:02:11,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:11,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 16:02:11,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-12 16:02:11,084 INFO L87 Difference]: Start difference. First operand 942 states and 2548 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:11,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:11,205 INFO L93 Difference]: Finished difference Result 1354 states and 3700 transitions. [2021-08-12 16:02:11,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 16:02:11,206 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-12 16:02:11,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:11,215 INFO L225 Difference]: With dead ends: 1354 [2021-08-12 16:02:11,215 INFO L226 Difference]: Without dead ends: 942 [2021-08-12 16:02:11,216 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-12 16:02:11,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-08-12 16:02:11,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 800. [2021-08-12 16:02:11,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.728410513141427) internal successors, (2180), 799 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:11,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-08-12 16:02:11,238 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 36 [2021-08-12 16:02:11,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:11,239 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-08-12 16:02:11,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:11,239 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-08-12 16:02:11,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 16:02:11,240 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:11,240 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:11,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 16:02:11,241 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:11,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:11,247 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-08-12 16:02:11,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:11,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046946310] [2021-08-12 16:02:11,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:11,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:11,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046946310] [2021-08-12 16:02:11,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046946310] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:02:11,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 16:02:11,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 16:02:11,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931792289] [2021-08-12 16:02:11,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 16:02:11,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:11,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 16:02:11,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-12 16:02:11,351 INFO L87 Difference]: Start difference. First operand 800 states and 2180 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:11,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:11,480 INFO L93 Difference]: Finished difference Result 1462 states and 4020 transitions. [2021-08-12 16:02:11,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 16:02:11,481 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-12 16:02:11,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:11,486 INFO L225 Difference]: With dead ends: 1462 [2021-08-12 16:02:11,486 INFO L226 Difference]: Without dead ends: 920 [2021-08-12 16:02:11,488 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-12 16:02:11,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-08-12 16:02:11,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-08-12 16:02:11,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.6882966396292005) internal successors, (2320), 863 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:11,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-08-12 16:02:11,510 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-08-12 16:02:11,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:11,510 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-08-12 16:02:11,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:11,511 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-08-12 16:02:11,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-12 16:02:11,512 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:11,512 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:11,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 16:02:11,512 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:11,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:11,512 INFO L82 PathProgramCache]: Analyzing trace with hash 307394794, now seen corresponding path program 1 times [2021-08-12 16:02:11,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:11,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126493655] [2021-08-12 16:02:11,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:11,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:11,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126493655] [2021-08-12 16:02:11,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126493655] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:02:11,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 16:02:11,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 16:02:11,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718339190] [2021-08-12 16:02:11,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 16:02:11,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:11,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 16:02:11,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 16:02:11,563 INFO L87 Difference]: Start difference. First operand 864 states and 2320 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:11,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:11,655 INFO L93 Difference]: Finished difference Result 1460 states and 3960 transitions. [2021-08-12 16:02:11,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 16:02:11,655 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-12 16:02:11,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:11,661 INFO L225 Difference]: With dead ends: 1460 [2021-08-12 16:02:11,661 INFO L226 Difference]: Without dead ends: 1072 [2021-08-12 16:02:11,662 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-12 16:02:11,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-08-12 16:02:11,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 876. [2021-08-12 16:02:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.7062857142857144) internal successors, (2368), 875 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:11,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-08-12 16:02:11,683 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-08-12 16:02:11,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:11,683 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-08-12 16:02:11,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:11,683 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-08-12 16:02:11,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-12 16:02:11,684 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:11,684 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:11,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-12 16:02:11,684 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:11,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:11,685 INFO L82 PathProgramCache]: Analyzing trace with hash -258094508, now seen corresponding path program 2 times [2021-08-12 16:02:11,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:11,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318630235] [2021-08-12 16:02:11,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:11,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:11,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318630235] [2021-08-12 16:02:11,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318630235] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:02:11,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 16:02:11,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 16:02:11,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108834178] [2021-08-12 16:02:11,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 16:02:11,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:11,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 16:02:11,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 16:02:11,770 INFO L87 Difference]: Start difference. First operand 876 states and 2368 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:11,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:11,874 INFO L93 Difference]: Finished difference Result 1900 states and 5256 transitions. [2021-08-12 16:02:11,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 16:02:11,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-12 16:02:11,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:11,882 INFO L225 Difference]: With dead ends: 1900 [2021-08-12 16:02:11,882 INFO L226 Difference]: Without dead ends: 1505 [2021-08-12 16:02:11,882 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:11,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-08-12 16:02:11,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-08-12 16:02:11,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.6981519507186857) internal successors, (2628), 974 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:11,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-08-12 16:02:11,907 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-08-12 16:02:11,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:11,907 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-08-12 16:02:11,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:11,907 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-08-12 16:02:11,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-12 16:02:11,908 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:11,908 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:11,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-12 16:02:11,909 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:11,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:11,909 INFO L82 PathProgramCache]: Analyzing trace with hash 129784312, now seen corresponding path program 3 times [2021-08-12 16:02:11,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:11,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495353863] [2021-08-12 16:02:11,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:11,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:11,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495353863] [2021-08-12 16:02:11,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495353863] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:02:11,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 16:02:11,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 16:02:11,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316701760] [2021-08-12 16:02:11,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 16:02:11,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:11,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 16:02:11,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 16:02:11,952 INFO L87 Difference]: Start difference. First operand 975 states and 2628 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:12,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:12,091 INFO L93 Difference]: Finished difference Result 2339 states and 6390 transitions. [2021-08-12 16:02:12,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 16:02:12,091 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-12 16:02:12,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:12,100 INFO L225 Difference]: With dead ends: 2339 [2021-08-12 16:02:12,100 INFO L226 Difference]: Without dead ends: 1944 [2021-08-12 16:02:12,101 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-12 16:02:12,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-08-12 16:02:12,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-08-12 16:02:12,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.769982238010657) internal successors, (3119), 1126 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-08-12 16:02:12,130 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-08-12 16:02:12,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:12,131 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-08-12 16:02:12,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:12,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-08-12 16:02:12,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-12 16:02:12,132 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:12,132 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:12,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-12 16:02:12,132 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:12,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:12,132 INFO L82 PathProgramCache]: Analyzing trace with hash 152127562, now seen corresponding path program 4 times [2021-08-12 16:02:12,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:12,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018329818] [2021-08-12 16:02:12,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:12,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:12,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018329818] [2021-08-12 16:02:12,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018329818] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:02:12,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 16:02:12,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 16:02:12,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257718943] [2021-08-12 16:02:12,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 16:02:12,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:12,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 16:02:12,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-12 16:02:12,176 INFO L87 Difference]: Start difference. First operand 1127 states and 3119 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:12,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:12,287 INFO L93 Difference]: Finished difference Result 1647 states and 4543 transitions. [2021-08-12 16:02:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 16:02:12,288 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-12 16:02:12,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:12,294 INFO L225 Difference]: With dead ends: 1647 [2021-08-12 16:02:12,294 INFO L226 Difference]: Without dead ends: 1138 [2021-08-12 16:02:12,295 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:12,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-08-12 16:02:12,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1033. [2021-08-12 16:02:12,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.73546511627907) internal successors, (2823), 1032 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:12,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2823 transitions. [2021-08-12 16:02:12,318 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2823 transitions. Word has length 40 [2021-08-12 16:02:12,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:12,318 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2823 transitions. [2021-08-12 16:02:12,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:12,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2823 transitions. [2021-08-12 16:02:12,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-12 16:02:12,320 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:12,320 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:12,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-12 16:02:12,320 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:12,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:12,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1301576209, now seen corresponding path program 1 times [2021-08-12 16:02:12,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:12,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185233907] [2021-08-12 16:02:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:12,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:12,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185233907] [2021-08-12 16:02:12,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185233907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:12,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981332479] [2021-08-12 16:02:12,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:12,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 16:02:12,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:12,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981332479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:12,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:12,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 16:02:12,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533673995] [2021-08-12 16:02:12,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 16:02:12,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:12,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 16:02:12,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-12 16:02:12,610 INFO L87 Difference]: Start difference. First operand 1033 states and 2823 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:12,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:12,777 INFO L93 Difference]: Finished difference Result 1579 states and 4299 transitions. [2021-08-12 16:02:12,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 16:02:12,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-12 16:02:12,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:12,784 INFO L225 Difference]: With dead ends: 1579 [2021-08-12 16:02:12,784 INFO L226 Difference]: Without dead ends: 1181 [2021-08-12 16:02:12,785 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:02:12,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-08-12 16:02:12,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1083. [2021-08-12 16:02:12,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 2.7060998151571165) internal successors, (2928), 1082 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2928 transitions. [2021-08-12 16:02:12,818 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2928 transitions. Word has length 45 [2021-08-12 16:02:12,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:12,819 INFO L482 AbstractCegarLoop]: Abstraction has 1083 states and 2928 transitions. [2021-08-12 16:02:12,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:12,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2928 transitions. [2021-08-12 16:02:12,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-12 16:02:12,820 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:12,820 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:13,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-08-12 16:02:13,042 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:13,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:13,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1689455029, now seen corresponding path program 2 times [2021-08-12 16:02:13,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:13,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33427165] [2021-08-12 16:02:13,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:13,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:13,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33427165] [2021-08-12 16:02:13,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33427165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:13,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834385074] [2021-08-12 16:02:13,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:13,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:13,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:13,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 16:02:13,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:13,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834385074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:13,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:13,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-12 16:02:13,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771050607] [2021-08-12 16:02:13,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 16:02:13,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:13,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 16:02:13,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-12 16:02:13,307 INFO L87 Difference]: Start difference. First operand 1083 states and 2928 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:13,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:13,473 INFO L93 Difference]: Finished difference Result 2461 states and 6703 transitions. [2021-08-12 16:02:13,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 16:02:13,473 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-12 16:02:13,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:13,483 INFO L225 Difference]: With dead ends: 2461 [2021-08-12 16:02:13,483 INFO L226 Difference]: Without dead ends: 2063 [2021-08-12 16:02:13,484 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:02:13,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-08-12 16:02:13,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1218. [2021-08-12 16:02:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 2.7666392769104355) internal successors, (3367), 1217 states have internal predecessors, (3367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:13,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3367 transitions. [2021-08-12 16:02:13,520 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3367 transitions. Word has length 45 [2021-08-12 16:02:13,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:13,520 INFO L482 AbstractCegarLoop]: Abstraction has 1218 states and 3367 transitions. [2021-08-12 16:02:13,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:13,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3367 transitions. [2021-08-12 16:02:13,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-12 16:02:13,522 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:13,522 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:13,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:13,739 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:13,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:13,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1711798279, now seen corresponding path program 3 times [2021-08-12 16:02:13,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:13,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199600144] [2021-08-12 16:02:13,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:13,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:13,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199600144] [2021-08-12 16:02:13,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199600144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:13,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908114191] [2021-08-12 16:02:13,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:13,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 16:02:13,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:13,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 16:02:13,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:13,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908114191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:13,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:13,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 16:02:13,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984781079] [2021-08-12 16:02:13,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 16:02:13,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:13,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 16:02:13,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 16:02:13,918 INFO L87 Difference]: Start difference. First operand 1218 states and 3367 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:14,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:14,144 INFO L93 Difference]: Finished difference Result 2249 states and 6261 transitions. [2021-08-12 16:02:14,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 16:02:14,144 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-12 16:02:14,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:14,152 INFO L225 Difference]: With dead ends: 2249 [2021-08-12 16:02:14,152 INFO L226 Difference]: Without dead ends: 1546 [2021-08-12 16:02:14,153 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:02:14,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-08-12 16:02:14,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1253. [2021-08-12 16:02:14,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 2.7619808306709266) internal successors, (3458), 1252 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 3458 transitions. [2021-08-12 16:02:14,182 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 3458 transitions. Word has length 45 [2021-08-12 16:02:14,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:14,182 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 3458 transitions. [2021-08-12 16:02:14,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:14,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 3458 transitions. [2021-08-12 16:02:14,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-12 16:02:14,183 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:14,183 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:14,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-12 16:02:14,400 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:14,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:14,400 INFO L82 PathProgramCache]: Analyzing trace with hash 315802636, now seen corresponding path program 1 times [2021-08-12 16:02:14,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:14,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165853963] [2021-08-12 16:02:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:14,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:14,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165853963] [2021-08-12 16:02:14,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165853963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:14,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401832513] [2021-08-12 16:02:14,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:14,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 16:02:14,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:14,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401832513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:14,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:14,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 16:02:14,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564802336] [2021-08-12 16:02:14,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 16:02:14,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:14,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 16:02:14,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-12 16:02:14,566 INFO L87 Difference]: Start difference. First operand 1253 states and 3458 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:14,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:14,777 INFO L93 Difference]: Finished difference Result 2526 states and 7020 transitions. [2021-08-12 16:02:14,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 16:02:14,778 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-12 16:02:14,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:14,786 INFO L225 Difference]: With dead ends: 2526 [2021-08-12 16:02:14,786 INFO L226 Difference]: Without dead ends: 1926 [2021-08-12 16:02:14,787 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:02:14,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-08-12 16:02:14,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1456. [2021-08-12 16:02:14,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 2.727835051546392) internal successors, (3969), 1455 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:14,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 3969 transitions. [2021-08-12 16:02:14,823 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 3969 transitions. Word has length 45 [2021-08-12 16:02:14,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:14,823 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 3969 transitions. [2021-08-12 16:02:14,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:14,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 3969 transitions. [2021-08-12 16:02:14,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:14,825 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:14,825 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:15,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:15,042 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:15,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:15,043 INFO L82 PathProgramCache]: Analyzing trace with hash 456189922, now seen corresponding path program 1 times [2021-08-12 16:02:15,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:15,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941053500] [2021-08-12 16:02:15,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:15,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:15,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941053500] [2021-08-12 16:02:15,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941053500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:15,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424374638] [2021-08-12 16:02:15,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:15,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 16:02:15,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:15,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424374638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:15,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:15,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-12 16:02:15,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693803485] [2021-08-12 16:02:15,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 16:02:15,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:15,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 16:02:15,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-12 16:02:15,243 INFO L87 Difference]: Start difference. First operand 1456 states and 3969 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:15,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:15,420 INFO L93 Difference]: Finished difference Result 1994 states and 5429 transitions. [2021-08-12 16:02:15,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 16:02:15,421 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-12 16:02:15,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:15,429 INFO L225 Difference]: With dead ends: 1994 [2021-08-12 16:02:15,430 INFO L226 Difference]: Without dead ends: 1596 [2021-08-12 16:02:15,431 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:02:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-08-12 16:02:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1531. [2021-08-12 16:02:15,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 2.6921568627450982) internal successors, (4119), 1530 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:15,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-08-12 16:02:15,516 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-08-12 16:02:15,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:15,516 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-08-12 16:02:15,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:15,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-08-12 16:02:15,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:15,518 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:15,519 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:15,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-12 16:02:15,719 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:15,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:15,720 INFO L82 PathProgramCache]: Analyzing trace with hash 117785766, now seen corresponding path program 2 times [2021-08-12 16:02:15,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:15,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637188389] [2021-08-12 16:02:15,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:15,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:15,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637188389] [2021-08-12 16:02:15,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637188389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:15,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113358729] [2021-08-12 16:02:15,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:15,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:15,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:15,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 16:02:15,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:15,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113358729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:15,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:15,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 16:02:15,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734887252] [2021-08-12 16:02:15,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 16:02:15,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:15,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 16:02:15,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 16:02:15,927 INFO L87 Difference]: Start difference. First operand 1531 states and 4119 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:16,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:16,124 INFO L93 Difference]: Finished difference Result 2109 states and 5659 transitions. [2021-08-12 16:02:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 16:02:16,124 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-12 16:02:16,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:16,131 INFO L225 Difference]: With dead ends: 2109 [2021-08-12 16:02:16,131 INFO L226 Difference]: Without dead ends: 1711 [2021-08-12 16:02:16,132 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:02:16,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-08-12 16:02:16,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1531. [2021-08-12 16:02:16,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 2.6921568627450982) internal successors, (4119), 1530 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:16,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-08-12 16:02:16,168 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-08-12 16:02:16,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:16,169 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-08-12 16:02:16,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:16,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-08-12 16:02:16,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:16,171 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:16,171 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:16,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:16,385 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:16,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:16,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1597456522, now seen corresponding path program 3 times [2021-08-12 16:02:16,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:16,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071908914] [2021-08-12 16:02:16,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:16,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:16,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071908914] [2021-08-12 16:02:16,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071908914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:16,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626230343] [2021-08-12 16:02:16,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:16,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 16:02:16,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:16,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 16:02:16,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:16,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626230343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:16,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:16,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-12 16:02:16,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762231083] [2021-08-12 16:02:16,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 16:02:16,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:16,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 16:02:16,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-12 16:02:16,602 INFO L87 Difference]: Start difference. First operand 1531 states and 4119 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:16,901 INFO L93 Difference]: Finished difference Result 2797 states and 7633 transitions. [2021-08-12 16:02:16,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 16:02:16,901 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-12 16:02:16,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:16,908 INFO L225 Difference]: With dead ends: 2797 [2021-08-12 16:02:16,909 INFO L226 Difference]: Without dead ends: 2046 [2021-08-12 16:02:16,910 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 202.8ms TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2021-08-12 16:02:16,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-08-12 16:02:16,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1561. [2021-08-12 16:02:16,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.7205128205128206) internal successors, (4244), 1560 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:16,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4244 transitions. [2021-08-12 16:02:16,950 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4244 transitions. Word has length 55 [2021-08-12 16:02:16,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:16,950 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4244 transitions. [2021-08-12 16:02:16,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:16,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4244 transitions. [2021-08-12 16:02:16,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:16,952 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:16,953 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:17,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 16:02:17,170 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:17,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:17,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1664863172, now seen corresponding path program 4 times [2021-08-12 16:02:17,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:17,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47902604] [2021-08-12 16:02:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:17,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:17,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47902604] [2021-08-12 16:02:17,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47902604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:17,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485317151] [2021-08-12 16:02:17,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:17,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:02:17,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:17,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 16:02:17,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:17,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485317151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:17,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:17,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 16:02:17,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012218924] [2021-08-12 16:02:17,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 16:02:17,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:17,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 16:02:17,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 16:02:17,344 INFO L87 Difference]: Start difference. First operand 1561 states and 4244 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:17,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:17,606 INFO L93 Difference]: Finished difference Result 3006 states and 8183 transitions. [2021-08-12 16:02:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 16:02:17,607 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-12 16:02:17,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:17,614 INFO L225 Difference]: With dead ends: 3006 [2021-08-12 16:02:17,614 INFO L226 Difference]: Without dead ends: 2608 [2021-08-12 16:02:17,615 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-08-12 16:02:17,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-08-12 16:02:17,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1741. [2021-08-12 16:02:17,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 2.760344827586207) internal successors, (4803), 1740 states have internal predecessors, (4803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:17,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 4803 transitions. [2021-08-12 16:02:17,667 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 4803 transitions. Word has length 55 [2021-08-12 16:02:17,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:17,667 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 4803 transitions. [2021-08-12 16:02:17,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:17,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 4803 transitions. [2021-08-12 16:02:17,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:17,669 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:17,670 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:17,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-12 16:02:17,886 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:17,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:17,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1687206422, now seen corresponding path program 5 times [2021-08-12 16:02:17,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:17,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175500654] [2021-08-12 16:02:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:17,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:17,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175500654] [2021-08-12 16:02:17,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175500654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:17,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873931632] [2021-08-12 16:02:17,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:18,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 16:02:18,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:18,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 16:02:18,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:18,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873931632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:18,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:18,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-12 16:02:18,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483466469] [2021-08-12 16:02:18,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 16:02:18,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:18,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 16:02:18,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-12 16:02:18,089 INFO L87 Difference]: Start difference. First operand 1741 states and 4803 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:18,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:18,380 INFO L93 Difference]: Finished difference Result 2949 states and 8171 transitions. [2021-08-12 16:02:18,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 16:02:18,381 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-12 16:02:18,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:18,388 INFO L225 Difference]: With dead ends: 2949 [2021-08-12 16:02:18,388 INFO L226 Difference]: Without dead ends: 2246 [2021-08-12 16:02:18,390 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 202.6ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-08-12 16:02:18,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-08-12 16:02:18,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1656. [2021-08-12 16:02:18,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 2.730513595166163) internal successors, (4519), 1655 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:18,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 4519 transitions. [2021-08-12 16:02:18,462 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 4519 transitions. Word has length 55 [2021-08-12 16:02:18,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:18,462 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 4519 transitions. [2021-08-12 16:02:18,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:18,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 4519 transitions. [2021-08-12 16:02:18,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:18,464 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:18,464 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:18,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-12 16:02:18,679 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:18,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:18,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1535924432, now seen corresponding path program 6 times [2021-08-12 16:02:18,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:18,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778090958] [2021-08-12 16:02:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:18,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:18,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778090958] [2021-08-12 16:02:18,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778090958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:18,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378590082] [2021-08-12 16:02:18,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:18,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 16:02:18,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:18,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 16:02:18,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:18,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378590082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:18,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:18,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-08-12 16:02:18,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311840423] [2021-08-12 16:02:18,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:02:18,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:18,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:02:18,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:18,897 INFO L87 Difference]: Start difference. First operand 1656 states and 4519 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:19,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:19,098 INFO L93 Difference]: Finished difference Result 2689 states and 7225 transitions. [2021-08-12 16:02:19,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 16:02:19,099 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-12 16:02:19,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:19,106 INFO L225 Difference]: With dead ends: 2689 [2021-08-12 16:02:19,106 INFO L226 Difference]: Without dead ends: 2212 [2021-08-12 16:02:19,108 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:02:19,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-08-12 16:02:19,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1658. [2021-08-12 16:02:19,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 2.7296318648159326) internal successors, (4523), 1657 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:19,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 4523 transitions. [2021-08-12 16:02:19,157 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 4523 transitions. Word has length 55 [2021-08-12 16:02:19,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:19,157 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 4523 transitions. [2021-08-12 16:02:19,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:19,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 4523 transitions. [2021-08-12 16:02:19,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:19,159 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:19,159 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:19,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-12 16:02:19,376 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:19,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:19,377 INFO L82 PathProgramCache]: Analyzing trace with hash 8869516, now seen corresponding path program 7 times [2021-08-12 16:02:19,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:19,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535667241] [2021-08-12 16:02:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:19,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:19,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535667241] [2021-08-12 16:02:19,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535667241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:19,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739587995] [2021-08-12 16:02:19,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:19,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 16:02:19,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:19,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739587995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:19,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:19,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-12 16:02:19,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279556783] [2021-08-12 16:02:19,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 16:02:19,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:19,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 16:02:19,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-12 16:02:19,596 INFO L87 Difference]: Start difference. First operand 1658 states and 4523 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:19,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:19,789 INFO L93 Difference]: Finished difference Result 2439 states and 6469 transitions. [2021-08-12 16:02:19,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 16:02:19,790 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-12 16:02:19,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:19,797 INFO L225 Difference]: With dead ends: 2439 [2021-08-12 16:02:19,797 INFO L226 Difference]: Without dead ends: 2026 [2021-08-12 16:02:19,798 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:02:19,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-08-12 16:02:19,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1638. [2021-08-12 16:02:19,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 2.7385461209529627) internal successors, (4483), 1637 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:19,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 4483 transitions. [2021-08-12 16:02:19,843 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 4483 transitions. Word has length 55 [2021-08-12 16:02:19,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:19,843 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 4483 transitions. [2021-08-12 16:02:19,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:19,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 4483 transitions. [2021-08-12 16:02:19,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:19,845 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:19,845 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:20,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:20,064 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:20,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:20,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1697636932, now seen corresponding path program 8 times [2021-08-12 16:02:20,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:20,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022966715] [2021-08-12 16:02:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:20,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:20,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022966715] [2021-08-12 16:02:20,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022966715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:20,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272432609] [2021-08-12 16:02:20,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:20,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:20,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:20,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 16:02:20,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:20,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272432609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:20,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:20,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-12 16:02:20,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83501516] [2021-08-12 16:02:20,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 16:02:20,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:20,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 16:02:20,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-12 16:02:20,239 INFO L87 Difference]: Start difference. First operand 1638 states and 4483 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:20,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:20,485 INFO L93 Difference]: Finished difference Result 2374 states and 6339 transitions. [2021-08-12 16:02:20,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 16:02:20,485 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-12 16:02:20,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:20,492 INFO L225 Difference]: With dead ends: 2374 [2021-08-12 16:02:20,492 INFO L226 Difference]: Without dead ends: 1961 [2021-08-12 16:02:20,493 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:02:20,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-08-12 16:02:20,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1613. [2021-08-12 16:02:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 2.75) internal successors, (4433), 1612 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:20,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 4433 transitions. [2021-08-12 16:02:20,544 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 4433 transitions. Word has length 55 [2021-08-12 16:02:20,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:20,544 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 4433 transitions. [2021-08-12 16:02:20,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:20,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 4433 transitions. [2021-08-12 16:02:20,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:20,546 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:20,546 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:20,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:20,762 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:20,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:20,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1496820963, now seen corresponding path program 9 times [2021-08-12 16:02:20,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:20,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181388660] [2021-08-12 16:02:20,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:20,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:20,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181388660] [2021-08-12 16:02:20,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181388660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:20,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776257859] [2021-08-12 16:02:20,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:20,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 16:02:20,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:20,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 16:02:20,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:21,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776257859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:21,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:21,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-12 16:02:21,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396184265] [2021-08-12 16:02:21,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 16:02:21,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:21,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 16:02:21,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-12 16:02:21,005 INFO L87 Difference]: Start difference. First operand 1613 states and 4433 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:21,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:21,319 INFO L93 Difference]: Finished difference Result 3416 states and 9510 transitions. [2021-08-12 16:02:21,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 16:02:21,320 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-12 16:02:21,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:21,329 INFO L225 Difference]: With dead ends: 3416 [2021-08-12 16:02:21,330 INFO L226 Difference]: Without dead ends: 2476 [2021-08-12 16:02:21,331 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-08-12 16:02:21,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-08-12 16:02:21,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1856. [2021-08-12 16:02:21,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 2.7326145552560646) internal successors, (5069), 1855 states have internal predecessors, (5069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:21,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5069 transitions. [2021-08-12 16:02:21,390 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5069 transitions. Word has length 55 [2021-08-12 16:02:21,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:21,390 INFO L482 AbstractCegarLoop]: Abstraction has 1856 states and 5069 transitions. [2021-08-12 16:02:21,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:21,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5069 transitions. [2021-08-12 16:02:21,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:21,392 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:21,392 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:21,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-12 16:02:21,611 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:21,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:21,611 INFO L82 PathProgramCache]: Analyzing trace with hash -2069953421, now seen corresponding path program 10 times [2021-08-12 16:02:21,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:21,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18432885] [2021-08-12 16:02:21,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:21,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:21,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18432885] [2021-08-12 16:02:21,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18432885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:21,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633713887] [2021-08-12 16:02:21,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:21,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:02:21,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:21,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:21,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:21,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633713887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:21,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:21,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-12 16:02:21,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880482731] [2021-08-12 16:02:21,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:21,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:21,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:21,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:21,851 INFO L87 Difference]: Start difference. First operand 1856 states and 5069 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:22,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:22,111 INFO L93 Difference]: Finished difference Result 2444 states and 6629 transitions. [2021-08-12 16:02:22,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 16:02:22,111 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-12 16:02:22,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:22,119 INFO L225 Difference]: With dead ends: 2444 [2021-08-12 16:02:22,119 INFO L226 Difference]: Without dead ends: 2046 [2021-08-12 16:02:22,120 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 154.6ms TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-08-12 16:02:22,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-08-12 16:02:22,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1931. [2021-08-12 16:02:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:22,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-08-12 16:02:22,175 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-08-12 16:02:22,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:22,175 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-08-12 16:02:22,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:22,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-08-12 16:02:22,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:22,178 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:22,178 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:22,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:22,395 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:22,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:22,395 INFO L82 PathProgramCache]: Analyzing trace with hash -423019465, now seen corresponding path program 11 times [2021-08-12 16:02:22,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:22,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802147625] [2021-08-12 16:02:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:22,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:22,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802147625] [2021-08-12 16:02:22,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802147625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:22,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600581561] [2021-08-12 16:02:22,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:22,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 16:02:22,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:22,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:22,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:22,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600581561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:22,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:22,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-12 16:02:22,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638057815] [2021-08-12 16:02:22,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:02:22,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:22,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:02:22,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:22,685 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:22,980 INFO L93 Difference]: Finished difference Result 2609 states and 6959 transitions. [2021-08-12 16:02:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 16:02:22,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-12 16:02:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:22,988 INFO L225 Difference]: With dead ends: 2609 [2021-08-12 16:02:22,988 INFO L226 Difference]: Without dead ends: 2211 [2021-08-12 16:02:22,989 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-08-12 16:02:22,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-08-12 16:02:23,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1931. [2021-08-12 16:02:23,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:23,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-08-12 16:02:23,043 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-08-12 16:02:23,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:23,043 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-08-12 16:02:23,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:23,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-08-12 16:02:23,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:23,045 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:23,045 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:23,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-12 16:02:23,262 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:23,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:23,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1607299847, now seen corresponding path program 12 times [2021-08-12 16:02:23,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:23,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064279286] [2021-08-12 16:02:23,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:23,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:23,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064279286] [2021-08-12 16:02:23,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064279286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:23,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345620939] [2021-08-12 16:02:23,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:23,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 16:02:23,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:23,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:23,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:23,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345620939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:23,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:23,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-12 16:02:23,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144695742] [2021-08-12 16:02:23,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:23,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:23,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:23,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:23,495 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:23,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:23,839 INFO L93 Difference]: Finished difference Result 2694 states and 7129 transitions. [2021-08-12 16:02:23,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 16:02:23,839 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-12 16:02:23,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:23,847 INFO L225 Difference]: With dead ends: 2694 [2021-08-12 16:02:23,847 INFO L226 Difference]: Without dead ends: 2296 [2021-08-12 16:02:23,848 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 183.0ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-08-12 16:02:23,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-08-12 16:02:23,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1931. [2021-08-12 16:02:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-08-12 16:02:23,903 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-08-12 16:02:23,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:23,904 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-08-12 16:02:23,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:23,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-08-12 16:02:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:23,906 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:23,906 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:24,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:24,122 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:24,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:24,123 INFO L82 PathProgramCache]: Analyzing trace with hash -2073427979, now seen corresponding path program 13 times [2021-08-12 16:02:24,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:24,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183595916] [2021-08-12 16:02:24,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:24,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:24,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183595916] [2021-08-12 16:02:24,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183595916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:24,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512985180] [2021-08-12 16:02:24,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:24,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:24,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:24,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512985180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:24,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:24,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-12 16:02:24,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321856410] [2021-08-12 16:02:24,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:02:24,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:24,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:02:24,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:24,351 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:24,661 INFO L93 Difference]: Finished difference Result 2624 states and 6989 transitions. [2021-08-12 16:02:24,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 16:02:24,661 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-12 16:02:24,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:24,669 INFO L225 Difference]: With dead ends: 2624 [2021-08-12 16:02:24,669 INFO L226 Difference]: Without dead ends: 2226 [2021-08-12 16:02:24,670 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-08-12 16:02:24,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-08-12 16:02:24,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1931. [2021-08-12 16:02:24,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:24,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-08-12 16:02:24,729 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-08-12 16:02:24,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:24,730 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-08-12 16:02:24,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:24,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-08-12 16:02:24,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:24,732 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:24,732 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:24,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-12 16:02:24,949 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:24,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:24,950 INFO L82 PathProgramCache]: Analyzing trace with hash 506297029, now seen corresponding path program 14 times [2021-08-12 16:02:24,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:24,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545970647] [2021-08-12 16:02:24,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:25,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:25,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545970647] [2021-08-12 16:02:25,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545970647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:25,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421469043] [2021-08-12 16:02:25,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:25,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:25,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:25,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:25,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:25,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421469043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:25,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:25,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-12 16:02:25,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817221068] [2021-08-12 16:02:25,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:25,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:25,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:25,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:25,166 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:25,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:25,656 INFO L93 Difference]: Finished difference Result 3202 states and 8743 transitions. [2021-08-12 16:02:25,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:02:25,656 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-12 16:02:25,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:25,665 INFO L225 Difference]: With dead ends: 3202 [2021-08-12 16:02:25,665 INFO L226 Difference]: Without dead ends: 2451 [2021-08-12 16:02:25,667 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 266.0ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-08-12 16:02:25,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-08-12 16:02:25,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1961. [2021-08-12 16:02:25,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 2.726530612244898) internal successors, (5344), 1960 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:25,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 5344 transitions. [2021-08-12 16:02:25,731 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 5344 transitions. Word has length 65 [2021-08-12 16:02:25,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:25,731 INFO L482 AbstractCegarLoop]: Abstraction has 1961 states and 5344 transitions. [2021-08-12 16:02:25,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:25,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 5344 transitions. [2021-08-12 16:02:25,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:25,735 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:25,735 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:25,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-12 16:02:25,952 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:25,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:25,952 INFO L82 PathProgramCache]: Analyzing trace with hash -526350573, now seen corresponding path program 15 times [2021-08-12 16:02:25,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:25,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685140167] [2021-08-12 16:02:25,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:26,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:26,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685140167] [2021-08-12 16:02:26,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685140167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:26,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805485753] [2021-08-12 16:02:26,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:26,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 16:02:26,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:26,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:26,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:26,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805485753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:26,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:26,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-12 16:02:26,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696161028] [2021-08-12 16:02:26,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:02:26,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:26,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:02:26,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:26,212 INFO L87 Difference]: Start difference. First operand 1961 states and 5344 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:26,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:26,602 INFO L93 Difference]: Finished difference Result 3406 states and 9283 transitions. [2021-08-12 16:02:26,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 16:02:26,602 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-12 16:02:26,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:26,638 INFO L225 Difference]: With dead ends: 3406 [2021-08-12 16:02:26,639 INFO L226 Difference]: Without dead ends: 3008 [2021-08-12 16:02:26,640 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-08-12 16:02:26,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-08-12 16:02:26,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2141. [2021-08-12 16:02:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2140 states have (on average 2.758411214953271) internal successors, (5903), 2140 states have internal predecessors, (5903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:26,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 5903 transitions. [2021-08-12 16:02:26,707 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 5903 transitions. Word has length 65 [2021-08-12 16:02:26,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:26,708 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 5903 transitions. [2021-08-12 16:02:26,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:26,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 5903 transitions. [2021-08-12 16:02:26,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:26,710 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:26,710 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:26,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-12 16:02:26,929 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:26,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:26,929 INFO L82 PathProgramCache]: Analyzing trace with hash -504007323, now seen corresponding path program 16 times [2021-08-12 16:02:26,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:26,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981956283] [2021-08-12 16:02:26,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:26,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:26,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981956283] [2021-08-12 16:02:26,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981956283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:26,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034147057] [2021-08-12 16:02:26,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:27,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:02:27,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:27,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:27,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:27,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034147057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:27,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:27,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-12 16:02:27,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068893009] [2021-08-12 16:02:27,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:27,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:27,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:27,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:27,171 INFO L87 Difference]: Start difference. First operand 2141 states and 5903 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:27,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:27,611 INFO L93 Difference]: Finished difference Result 3349 states and 9271 transitions. [2021-08-12 16:02:27,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:02:27,611 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-12 16:02:27,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:27,620 INFO L225 Difference]: With dead ends: 3349 [2021-08-12 16:02:27,620 INFO L226 Difference]: Without dead ends: 2646 [2021-08-12 16:02:27,622 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 267.8ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 16:02:27,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-08-12 16:02:27,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2056. [2021-08-12 16:02:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 2055 states have (on average 2.7343065693430657) internal successors, (5619), 2055 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:27,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 5619 transitions. [2021-08-12 16:02:27,687 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 5619 transitions. Word has length 65 [2021-08-12 16:02:27,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:27,687 INFO L482 AbstractCegarLoop]: Abstraction has 2056 states and 5619 transitions. [2021-08-12 16:02:27,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:27,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 5619 transitions. [2021-08-12 16:02:27,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:27,689 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:27,689 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:27,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-12 16:02:27,903 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:27,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:27,903 INFO L82 PathProgramCache]: Analyzing trace with hash 211164831, now seen corresponding path program 17 times [2021-08-12 16:02:27,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:27,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916228756] [2021-08-12 16:02:27,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:27,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:27,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916228756] [2021-08-12 16:02:27,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916228756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:27,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557419325] [2021-08-12 16:02:27,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:28,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 16:02:28,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:28,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:28,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:28,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557419325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:28,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:28,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-08-12 16:02:28,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887643233] [2021-08-12 16:02:28,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:02:28,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:28,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:02:28,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:02:28,205 INFO L87 Difference]: Start difference. First operand 2056 states and 5619 transitions. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:28,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:28,536 INFO L93 Difference]: Finished difference Result 3189 states and 8525 transitions. [2021-08-12 16:02:28,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 16:02:28,536 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-12 16:02:28,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:28,544 INFO L225 Difference]: With dead ends: 3189 [2021-08-12 16:02:28,544 INFO L226 Difference]: Without dead ends: 2712 [2021-08-12 16:02:28,546 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 152.8ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-08-12 16:02:28,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-08-12 16:02:28,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2058. [2021-08-12 16:02:28,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 2.733592610597958) internal successors, (5623), 2057 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:28,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 5623 transitions. [2021-08-12 16:02:28,614 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 5623 transitions. Word has length 65 [2021-08-12 16:02:28,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:28,615 INFO L482 AbstractCegarLoop]: Abstraction has 2058 states and 5623 transitions. [2021-08-12 16:02:28,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:28,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 5623 transitions. [2021-08-12 16:02:28,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:28,617 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:28,617 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:28,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:28,833 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:28,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:28,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1649663653, now seen corresponding path program 18 times [2021-08-12 16:02:28,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:28,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610097982] [2021-08-12 16:02:28,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:28,898 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:28,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:28,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610097982] [2021-08-12 16:02:28,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610097982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:28,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563438289] [2021-08-12 16:02:28,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:28,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 16:02:28,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:28,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 16:02:28,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:29,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563438289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:29,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:29,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 16:02:29,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510331377] [2021-08-12 16:02:29,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 16:02:29,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:29,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 16:02:29,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-12 16:02:29,028 INFO L87 Difference]: Start difference. First operand 2058 states and 5623 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:29,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:29,376 INFO L93 Difference]: Finished difference Result 2989 states and 7869 transitions. [2021-08-12 16:02:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 16:02:29,377 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-12 16:02:29,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:29,385 INFO L225 Difference]: With dead ends: 2989 [2021-08-12 16:02:29,385 INFO L226 Difference]: Without dead ends: 2576 [2021-08-12 16:02:29,386 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:02:29,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-08-12 16:02:29,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 2038. [2021-08-12 16:02:29,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 2037 states have (on average 2.74079528718704) internal successors, (5583), 2037 states have internal predecessors, (5583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:29,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 5583 transitions. [2021-08-12 16:02:29,453 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 5583 transitions. Word has length 65 [2021-08-12 16:02:29,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:29,454 INFO L482 AbstractCegarLoop]: Abstraction has 2038 states and 5583 transitions. [2021-08-12 16:02:29,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:29,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 5583 transitions. [2021-08-12 16:02:29,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:29,456 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:29,456 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:29,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:29,673 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:29,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:29,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1345737589, now seen corresponding path program 19 times [2021-08-12 16:02:29,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:29,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10861675] [2021-08-12 16:02:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:29,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:29,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10861675] [2021-08-12 16:02:29,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10861675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:29,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488463967] [2021-08-12 16:02:29,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:29,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 16:02:29,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:29,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488463967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:29,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:29,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-12 16:02:29,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136827356] [2021-08-12 16:02:29,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:02:29,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:29,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:02:29,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:29,884 INFO L87 Difference]: Start difference. First operand 2038 states and 5583 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:30,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:30,304 INFO L93 Difference]: Finished difference Result 2924 states and 7739 transitions. [2021-08-12 16:02:30,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 16:02:30,305 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-12 16:02:30,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:30,313 INFO L225 Difference]: With dead ends: 2924 [2021-08-12 16:02:30,313 INFO L226 Difference]: Without dead ends: 2511 [2021-08-12 16:02:30,315 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 150.1ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-08-12 16:02:30,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-08-12 16:02:30,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2013. [2021-08-12 16:02:30,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 2.75) internal successors, (5533), 2012 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:30,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 5533 transitions. [2021-08-12 16:02:30,396 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 5533 transitions. Word has length 65 [2021-08-12 16:02:30,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:30,396 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 5533 transitions. [2021-08-12 16:02:30,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:30,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 5533 transitions. [2021-08-12 16:02:30,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:30,401 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:30,401 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:30,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-12 16:02:30,613 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:30,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:30,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1991900067, now seen corresponding path program 20 times [2021-08-12 16:02:30,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:30,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427980001] [2021-08-12 16:02:30,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:30,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:30,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427980001] [2021-08-12 16:02:30,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427980001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:30,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774536338] [2021-08-12 16:02:30,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:30,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:30,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:30,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 16:02:30,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:30,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774536338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:30,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:30,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 16:02:30,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191301112] [2021-08-12 16:02:30,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 16:02:30,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:30,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 16:02:30,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-12 16:02:30,822 INFO L87 Difference]: Start difference. First operand 2013 states and 5533 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:31,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:31,174 INFO L93 Difference]: Finished difference Result 2849 states and 7589 transitions. [2021-08-12 16:02:31,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 16:02:31,174 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-12 16:02:31,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:31,183 INFO L225 Difference]: With dead ends: 2849 [2021-08-12 16:02:31,183 INFO L226 Difference]: Without dead ends: 2436 [2021-08-12 16:02:31,184 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:02:31,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-08-12 16:02:31,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1988. [2021-08-12 16:02:31,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.7594363361852037) internal successors, (5483), 1987 states have internal predecessors, (5483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:31,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 5483 transitions. [2021-08-12 16:02:31,250 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 5483 transitions. Word has length 65 [2021-08-12 16:02:31,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:31,250 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 5483 transitions. [2021-08-12 16:02:31,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:31,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 5483 transitions. [2021-08-12 16:02:31,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:31,253 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:31,253 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:31,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:31,469 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:31,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:31,469 INFO L82 PathProgramCache]: Analyzing trace with hash 596560781, now seen corresponding path program 21 times [2021-08-12 16:02:31,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:31,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597748556] [2021-08-12 16:02:31,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:31,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:31,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597748556] [2021-08-12 16:02:31,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597748556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:31,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383133712] [2021-08-12 16:02:31,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:31,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 16:02:31,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:31,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 16:02:31,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 16:02:31,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383133712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:31,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:31,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-12 16:02:31,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867290355] [2021-08-12 16:02:31,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:02:31,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:31,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:02:31,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:31,664 INFO L87 Difference]: Start difference. First operand 1988 states and 5483 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:32,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:32,085 INFO L93 Difference]: Finished difference Result 2774 states and 7439 transitions. [2021-08-12 16:02:32,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 16:02:32,085 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-12 16:02:32,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:32,093 INFO L225 Difference]: With dead ends: 2774 [2021-08-12 16:02:32,093 INFO L226 Difference]: Without dead ends: 2361 [2021-08-12 16:02:32,094 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-08-12 16:02:32,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-08-12 16:02:32,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1963. [2021-08-12 16:02:32,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 2.7691131498470947) internal successors, (5433), 1962 states have internal predecessors, (5433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:32,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 5433 transitions. [2021-08-12 16:02:32,153 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 5433 transitions. Word has length 65 [2021-08-12 16:02:32,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:32,153 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 5433 transitions. [2021-08-12 16:02:32,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:32,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 5433 transitions. [2021-08-12 16:02:32,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:32,155 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:32,155 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:32,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-12 16:02:32,372 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:32,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:32,372 INFO L82 PathProgramCache]: Analyzing trace with hash 797376750, now seen corresponding path program 22 times [2021-08-12 16:02:32,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:32,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688387400] [2021-08-12 16:02:32,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:32,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:32,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688387400] [2021-08-12 16:02:32,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688387400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:32,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250536343] [2021-08-12 16:02:32,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:32,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:02:32,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:32,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:32,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:32,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250536343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:32,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:32,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-12 16:02:32,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563801513] [2021-08-12 16:02:32,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:02:32,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:32,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:02:32,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:32,612 INFO L87 Difference]: Start difference. First operand 1963 states and 5433 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:32,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:32,989 INFO L93 Difference]: Finished difference Result 3183 states and 8791 transitions. [2021-08-12 16:02:32,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 16:02:32,990 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-12 16:02:32,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:33,000 INFO L225 Difference]: With dead ends: 3183 [2021-08-12 16:02:33,001 INFO L226 Difference]: Without dead ends: 2446 [2021-08-12 16:02:33,003 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2021-08-12 16:02:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-08-12 16:02:33,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2028. [2021-08-12 16:02:33,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.8036507153428714) internal successors, (5683), 2027 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:33,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5683 transitions. [2021-08-12 16:02:33,100 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5683 transitions. Word has length 65 [2021-08-12 16:02:33,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:33,100 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5683 transitions. [2021-08-12 16:02:33,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:33,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5683 transitions. [2021-08-12 16:02:33,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-12 16:02:33,103 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:33,103 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:33,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-12 16:02:33,317 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:33,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:33,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2053970119, now seen corresponding path program 23 times [2021-08-12 16:02:33,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:33,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839461671] [2021-08-12 16:02:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:33,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:33,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839461671] [2021-08-12 16:02:33,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839461671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:33,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191152747] [2021-08-12 16:02:33,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:33,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 16:02:33,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:33,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:02:33,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:33,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191152747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:33,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:33,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-08-12 16:02:33,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937367684] [2021-08-12 16:02:33,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:02:33,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:33,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:02:33,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:02:33,580 INFO L87 Difference]: Start difference. First operand 2028 states and 5683 transitions. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:33,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:33,927 INFO L93 Difference]: Finished difference Result 2996 states and 8259 transitions. [2021-08-12 16:02:33,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 16:02:33,927 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-12 16:02:33,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:33,937 INFO L225 Difference]: With dead ends: 2996 [2021-08-12 16:02:33,937 INFO L226 Difference]: Without dead ends: 2534 [2021-08-12 16:02:33,938 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 191.8ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-08-12 16:02:33,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-08-12 16:02:34,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2113. [2021-08-12 16:02:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.7713068181818183) internal successors, (5853), 2112 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:34,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5853 transitions. [2021-08-12 16:02:34,014 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5853 transitions. Word has length 70 [2021-08-12 16:02:34,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:34,015 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5853 transitions. [2021-08-12 16:02:34,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:34,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5853 transitions. [2021-08-12 16:02:34,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-12 16:02:34,017 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:34,017 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:34,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-12 16:02:34,234 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:34,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:34,234 INFO L82 PathProgramCache]: Analyzing trace with hash -778605685, now seen corresponding path program 24 times [2021-08-12 16:02:34,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:34,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705378721] [2021-08-12 16:02:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:34,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:34,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705378721] [2021-08-12 16:02:34,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705378721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:34,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31208733] [2021-08-12 16:02:34,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:34,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 16:02:34,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:34,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:02:34,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:34,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31208733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:34,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:34,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-12 16:02:34,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404536841] [2021-08-12 16:02:34,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:34,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:34,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:34,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:34,450 INFO L87 Difference]: Start difference. First operand 2113 states and 5853 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:34,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:34,996 INFO L93 Difference]: Finished difference Result 3189 states and 8389 transitions. [2021-08-12 16:02:34,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 16:02:34,996 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-12 16:02:34,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:35,005 INFO L225 Difference]: With dead ends: 3189 [2021-08-12 16:02:35,006 INFO L226 Difference]: Without dead ends: 2791 [2021-08-12 16:02:35,007 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-08-12 16:02:35,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-08-12 16:02:35,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2128. [2021-08-12 16:02:35,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:35,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-08-12 16:02:35,090 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-08-12 16:02:35,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:35,090 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-08-12 16:02:35,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:35,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-08-12 16:02:35,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-12 16:02:35,093 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:35,093 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:35,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-12 16:02:35,304 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:35,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:35,304 INFO L82 PathProgramCache]: Analyzing trace with hash 220290651, now seen corresponding path program 25 times [2021-08-12 16:02:35,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:35,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139846112] [2021-08-12 16:02:35,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:35,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:35,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139846112] [2021-08-12 16:02:35,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139846112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:35,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968741691] [2021-08-12 16:02:35,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:35,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:02:35,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:35,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968741691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:35,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:35,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-08-12 16:02:35,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855172225] [2021-08-12 16:02:35,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:02:35,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:35,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:02:35,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:02:35,551 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:36,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:36,179 INFO L93 Difference]: Finished difference Result 3074 states and 8159 transitions. [2021-08-12 16:02:36,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 16:02:36,179 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-12 16:02:36,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:36,188 INFO L225 Difference]: With dead ends: 3074 [2021-08-12 16:02:36,189 INFO L226 Difference]: Without dead ends: 2676 [2021-08-12 16:02:36,190 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-08-12 16:02:36,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-08-12 16:02:36,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2128. [2021-08-12 16:02:36,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:36,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-08-12 16:02:36,281 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-08-12 16:02:36,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:36,282 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-08-12 16:02:36,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:36,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-08-12 16:02:36,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-12 16:02:36,284 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:36,284 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:36,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-12 16:02:36,501 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:36,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:36,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1659037239, now seen corresponding path program 26 times [2021-08-12 16:02:36,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:36,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482857057] [2021-08-12 16:02:36,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:36,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:36,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482857057] [2021-08-12 16:02:36,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482857057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:36,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779912912] [2021-08-12 16:02:36,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:36,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:36,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:36,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:02:36,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:36,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779912912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:36,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:36,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-12 16:02:36,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697273923] [2021-08-12 16:02:36,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:36,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:36,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:36,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:36,715 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:37,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:37,327 INFO L93 Difference]: Finished difference Result 3049 states and 8109 transitions. [2021-08-12 16:02:37,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 16:02:37,327 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-12 16:02:37,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:37,337 INFO L225 Difference]: With dead ends: 3049 [2021-08-12 16:02:37,337 INFO L226 Difference]: Without dead ends: 2651 [2021-08-12 16:02:37,338 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-08-12 16:02:37,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-08-12 16:02:37,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2128. [2021-08-12 16:02:37,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:37,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-08-12 16:02:37,427 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-08-12 16:02:37,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:37,427 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-08-12 16:02:37,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:37,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-08-12 16:02:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-12 16:02:37,429 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:37,430 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:37,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:37,646 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:37,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:37,646 INFO L82 PathProgramCache]: Analyzing trace with hash 371282073, now seen corresponding path program 27 times [2021-08-12 16:02:37,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:37,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103466753] [2021-08-12 16:02:37,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:37,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:37,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103466753] [2021-08-12 16:02:37,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103466753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:37,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138827206] [2021-08-12 16:02:37,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:37,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 16:02:37,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:37,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:02:37,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:37,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138827206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:37,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:37,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-08-12 16:02:37,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593850896] [2021-08-12 16:02:37,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:02:37,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:37,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:02:37,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:02:37,942 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:38,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:38,610 INFO L93 Difference]: Finished difference Result 2999 states and 8009 transitions. [2021-08-12 16:02:38,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 16:02:38,611 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-12 16:02:38,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:38,622 INFO L225 Difference]: With dead ends: 2999 [2021-08-12 16:02:38,622 INFO L226 Difference]: Without dead ends: 2601 [2021-08-12 16:02:38,623 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 214.8ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-08-12 16:02:38,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-08-12 16:02:38,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2128. [2021-08-12 16:02:38,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-08-12 16:02:38,712 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-08-12 16:02:38,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:38,713 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-08-12 16:02:38,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:38,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-08-12 16:02:38,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-12 16:02:38,715 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:38,715 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:38,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:38,927 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:38,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:38,927 INFO L82 PathProgramCache]: Analyzing trace with hash 985521543, now seen corresponding path program 28 times [2021-08-12 16:02:38,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:38,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813578426] [2021-08-12 16:02:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:39,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:39,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813578426] [2021-08-12 16:02:39,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813578426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:39,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531824960] [2021-08-12 16:02:39,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:39,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:02:39,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:39,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:02:39,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:39,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531824960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:39,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:39,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-12 16:02:39,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557633618] [2021-08-12 16:02:39,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:39,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:39,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:39,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:39,198 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:39,785 INFO L93 Difference]: Finished difference Result 2949 states and 7909 transitions. [2021-08-12 16:02:39,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 16:02:39,786 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-12 16:02:39,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:39,795 INFO L225 Difference]: With dead ends: 2949 [2021-08-12 16:02:39,795 INFO L226 Difference]: Without dead ends: 2551 [2021-08-12 16:02:39,796 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-08-12 16:02:39,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2021-08-12 16:02:39,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2128. [2021-08-12 16:02:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.765867418899859) internal successors, (5883), 2127 states have internal predecessors, (5883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:39,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5883 transitions. [2021-08-12 16:02:39,881 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5883 transitions. Word has length 70 [2021-08-12 16:02:39,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:39,882 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5883 transitions. [2021-08-12 16:02:39,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:39,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5883 transitions. [2021-08-12 16:02:39,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-12 16:02:39,884 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:39,884 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:40,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-12 16:02:40,100 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:40,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:40,100 INFO L82 PathProgramCache]: Analyzing trace with hash -729720745, now seen corresponding path program 29 times [2021-08-12 16:02:40,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:40,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371736424] [2021-08-12 16:02:40,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:40,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:40,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371736424] [2021-08-12 16:02:40,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371736424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:40,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098712852] [2021-08-12 16:02:40,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:40,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 16:02:40,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:40,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:02:40,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:40,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098712852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:40,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:40,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-08-12 16:02:40,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541089399] [2021-08-12 16:02:40,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:02:40,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:40,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:02:40,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:02:40,313 INFO L87 Difference]: Start difference. First operand 2128 states and 5883 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:40,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:40,970 INFO L93 Difference]: Finished difference Result 2959 states and 7959 transitions. [2021-08-12 16:02:40,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:02:40,970 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-12 16:02:40,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:40,979 INFO L225 Difference]: With dead ends: 2959 [2021-08-12 16:02:40,979 INFO L226 Difference]: Without dead ends: 2561 [2021-08-12 16:02:40,980 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 16:02:40,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-08-12 16:02:41,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 2128. [2021-08-12 16:02:41,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 2.768218147625764) internal successors, (5888), 2127 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5888 transitions. [2021-08-12 16:02:41,064 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5888 transitions. Word has length 70 [2021-08-12 16:02:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:41,064 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5888 transitions. [2021-08-12 16:02:41,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:41,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5888 transitions. [2021-08-12 16:02:41,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-12 16:02:41,066 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:41,067 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:41,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:41,283 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:41,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:41,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1762368347, now seen corresponding path program 30 times [2021-08-12 16:02:41,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:41,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239868965] [2021-08-12 16:02:41,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:41,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:41,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239868965] [2021-08-12 16:02:41,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239868965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:41,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875003294] [2021-08-12 16:02:41,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:41,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 16:02:41,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:41,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:02:41,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:41,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875003294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:41,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:41,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-12 16:02:41,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199504996] [2021-08-12 16:02:41,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:41,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:41,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:41,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:41,483 INFO L87 Difference]: Start difference. First operand 2128 states and 5888 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:42,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:42,079 INFO L93 Difference]: Finished difference Result 3726 states and 10133 transitions. [2021-08-12 16:02:42,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 16:02:42,079 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-12 16:02:42,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:42,090 INFO L225 Difference]: With dead ends: 3726 [2021-08-12 16:02:42,090 INFO L226 Difference]: Without dead ends: 3328 [2021-08-12 16:02:42,091 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 176.3ms TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-08-12 16:02:42,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-08-12 16:02:42,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2308. [2021-08-12 16:02:42,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 2.7945383615084527) internal successors, (6447), 2307 states have internal predecessors, (6447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:42,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 6447 transitions. [2021-08-12 16:02:42,185 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 6447 transitions. Word has length 70 [2021-08-12 16:02:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:42,185 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 6447 transitions. [2021-08-12 16:02:42,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:42,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 6447 transitions. [2021-08-12 16:02:42,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-12 16:02:42,188 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:42,188 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:42,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-12 16:02:42,392 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:42,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:42,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1740025097, now seen corresponding path program 31 times [2021-08-12 16:02:42,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:42,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883864902] [2021-08-12 16:02:42,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:42,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:42,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883864902] [2021-08-12 16:02:42,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883864902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:42,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635131019] [2021-08-12 16:02:42,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:42,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:02:42,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:42,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635131019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:42,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:42,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-08-12 16:02:42,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214705136] [2021-08-12 16:02:42,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:02:42,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:42,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:02:42,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:02:42,614 INFO L87 Difference]: Start difference. First operand 2308 states and 6447 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:43,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:43,325 INFO L93 Difference]: Finished difference Result 3549 states and 9761 transitions. [2021-08-12 16:02:43,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 16:02:43,325 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-12 16:02:43,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:43,334 INFO L225 Difference]: With dead ends: 3549 [2021-08-12 16:02:43,334 INFO L226 Difference]: Without dead ends: 2846 [2021-08-12 16:02:43,336 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 285.8ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 16:02:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-08-12 16:02:43,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1803. [2021-08-12 16:02:43,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 2.7291897891231964) internal successors, (4918), 1802 states have internal predecessors, (4918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:43,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 4918 transitions. [2021-08-12 16:02:43,422 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 4918 transitions. Word has length 70 [2021-08-12 16:02:43,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:43,422 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 4918 transitions. [2021-08-12 16:02:43,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:43,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 4918 transitions. [2021-08-12 16:02:43,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:02:43,424 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:43,424 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:43,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:43,629 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:43,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:43,629 INFO L82 PathProgramCache]: Analyzing trace with hash 751678088, now seen corresponding path program 32 times [2021-08-12 16:02:43,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:43,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836320575] [2021-08-12 16:02:43,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:43,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:43,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836320575] [2021-08-12 16:02:43,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836320575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:43,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497635327] [2021-08-12 16:02:43,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:43,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:43,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:43,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:02:43,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:43,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497635327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:43,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:43,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-12 16:02:43,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150853810] [2021-08-12 16:02:43,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:02:43,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:43,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:02:43,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:02:43,891 INFO L87 Difference]: Start difference. First operand 1803 states and 4918 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:44,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:44,538 INFO L93 Difference]: Finished difference Result 2749 states and 7269 transitions. [2021-08-12 16:02:44,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 16:02:44,539 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-12 16:02:44,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:44,548 INFO L225 Difference]: With dead ends: 2749 [2021-08-12 16:02:44,548 INFO L226 Difference]: Without dead ends: 2351 [2021-08-12 16:02:44,549 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-08-12 16:02:44,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-08-12 16:02:44,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1878. [2021-08-12 16:02:44,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 2.7400106553010124) internal successors, (5143), 1877 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:44,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5143 transitions. [2021-08-12 16:02:44,651 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5143 transitions. Word has length 75 [2021-08-12 16:02:44,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:44,651 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5143 transitions. [2021-08-12 16:02:44,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:44,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5143 transitions. [2021-08-12 16:02:44,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:02:44,653 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:44,653 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:44,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-12 16:02:44,865 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:44,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:44,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1750574424, now seen corresponding path program 33 times [2021-08-12 16:02:44,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:44,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302344080] [2021-08-12 16:02:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:44,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:44,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302344080] [2021-08-12 16:02:44,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302344080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:44,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209665994] [2021-08-12 16:02:44,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:45,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 16:02:45,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:45,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:02:45,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:45,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209665994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:45,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:45,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-08-12 16:02:45,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777514320] [2021-08-12 16:02:45,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 16:02:45,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:45,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 16:02:45,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-12 16:02:45,193 INFO L87 Difference]: Start difference. First operand 1878 states and 5143 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:46,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:46,091 INFO L93 Difference]: Finished difference Result 2969 states and 7784 transitions. [2021-08-12 16:02:46,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 16:02:46,091 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-12 16:02:46,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:46,102 INFO L225 Difference]: With dead ends: 2969 [2021-08-12 16:02:46,102 INFO L226 Difference]: Without dead ends: 2571 [2021-08-12 16:02:46,103 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 215.3ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-08-12 16:02:46,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-08-12 16:02:46,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1953. [2021-08-12 16:02:46,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.75) internal successors, (5368), 1952 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5368 transitions. [2021-08-12 16:02:46,213 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5368 transitions. Word has length 75 [2021-08-12 16:02:46,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:46,214 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5368 transitions. [2021-08-12 16:02:46,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:46,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5368 transitions. [2021-08-12 16:02:46,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:02:46,216 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:46,216 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:46,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-12 16:02:46,431 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:46,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:46,431 INFO L82 PathProgramCache]: Analyzing trace with hash -128753466, now seen corresponding path program 34 times [2021-08-12 16:02:46,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:46,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338880108] [2021-08-12 16:02:46,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:46,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:46,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338880108] [2021-08-12 16:02:46,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338880108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:46,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195358207] [2021-08-12 16:02:46,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:46,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:02:46,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:46,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:02:46,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:46,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195358207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:46,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:46,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-12 16:02:46,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947789074] [2021-08-12 16:02:46,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:02:46,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:46,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:02:46,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:02:46,680 INFO L87 Difference]: Start difference. First operand 1953 states and 5368 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:47,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:47,547 INFO L93 Difference]: Finished difference Result 2999 states and 7919 transitions. [2021-08-12 16:02:47,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 16:02:47,548 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-12 16:02:47,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:47,560 INFO L225 Difference]: With dead ends: 2999 [2021-08-12 16:02:47,560 INFO L226 Difference]: Without dead ends: 2601 [2021-08-12 16:02:47,561 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 181.6ms TimeCoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2021-08-12 16:02:47,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-08-12 16:02:47,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2028. [2021-08-12 16:02:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.759250123334978) internal successors, (5593), 2027 states have internal predecessors, (5593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5593 transitions. [2021-08-12 16:02:47,695 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5593 transitions. Word has length 75 [2021-08-12 16:02:47,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:47,695 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5593 transitions. [2021-08-12 16:02:47,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:47,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5593 transitions. [2021-08-12 16:02:47,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:02:47,698 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:47,698 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:47,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-12 16:02:47,906 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:47,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:47,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1901565846, now seen corresponding path program 35 times [2021-08-12 16:02:47,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:47,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101091728] [2021-08-12 16:02:47,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:48,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:48,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101091728] [2021-08-12 16:02:48,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101091728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:48,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84727267] [2021-08-12 16:02:48,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:48,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 16:02:48,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:48,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:02:48,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:48,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84727267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:48,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:48,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-08-12 16:02:48,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736353440] [2021-08-12 16:02:48,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 16:02:48,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:48,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 16:02:48,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-12 16:02:48,203 INFO L87 Difference]: Start difference. First operand 2028 states and 5593 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:49,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:49,127 INFO L93 Difference]: Finished difference Result 3024 states and 8044 transitions. [2021-08-12 16:02:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:02:49,127 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-12 16:02:49,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:49,139 INFO L225 Difference]: With dead ends: 3024 [2021-08-12 16:02:49,139 INFO L226 Difference]: Without dead ends: 2626 [2021-08-12 16:02:49,140 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 16:02:49,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-08-12 16:02:49,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2103. [2021-08-12 16:02:49,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 2.7678401522359657) internal successors, (5818), 2102 states have internal predecessors, (5818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:49,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5818 transitions. [2021-08-12 16:02:49,253 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5818 transitions. Word has length 75 [2021-08-12 16:02:49,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:49,254 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5818 transitions. [2021-08-12 16:02:49,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:49,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5818 transitions. [2021-08-12 16:02:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:02:49,256 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:49,256 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:49,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-12 16:02:49,460 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:49,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:49,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1779161980, now seen corresponding path program 36 times [2021-08-12 16:02:49,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:49,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048965648] [2021-08-12 16:02:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:49,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:49,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048965648] [2021-08-12 16:02:49,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048965648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:49,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691882055] [2021-08-12 16:02:49,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:49,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 16:02:49,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:49,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:02:49,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:49,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691882055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:49,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:49,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-12 16:02:49,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078409838] [2021-08-12 16:02:49,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:02:49,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:49,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:02:49,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:02:49,680 INFO L87 Difference]: Start difference. First operand 2103 states and 5818 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:50,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:50,539 INFO L93 Difference]: Finished difference Result 3094 states and 8289 transitions. [2021-08-12 16:02:50,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 16:02:50,539 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-12 16:02:50,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:50,549 INFO L225 Difference]: With dead ends: 3094 [2021-08-12 16:02:50,549 INFO L226 Difference]: Without dead ends: 2696 [2021-08-12 16:02:50,550 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 16:02:50,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-08-12 16:02:50,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2178. [2021-08-12 16:02:50,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 2.782728525493799) internal successors, (6058), 2177 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:50,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 6058 transitions. [2021-08-12 16:02:50,662 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 6058 transitions. Word has length 75 [2021-08-12 16:02:50,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:50,663 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 6058 transitions. [2021-08-12 16:02:50,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:50,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 6058 transitions. [2021-08-12 16:02:50,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:02:50,665 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:50,665 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:50,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:50,881 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:50,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:50,881 INFO L82 PathProgramCache]: Analyzing trace with hash 800563028, now seen corresponding path program 37 times [2021-08-12 16:02:50,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:50,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667910219] [2021-08-12 16:02:50,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:50,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:50,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667910219] [2021-08-12 16:02:50,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667910219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:50,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697307304] [2021-08-12 16:02:50,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:51,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:02:51,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:51,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697307304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:51,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:51,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-08-12 16:02:51,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056198945] [2021-08-12 16:02:51,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 16:02:51,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:51,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 16:02:51,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-12 16:02:51,098 INFO L87 Difference]: Start difference. First operand 2178 states and 6058 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:52,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:52,027 INFO L93 Difference]: Finished difference Result 3672 states and 10043 transitions. [2021-08-12 16:02:52,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 16:02:52,028 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-12 16:02:52,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:52,040 INFO L225 Difference]: With dead ends: 3672 [2021-08-12 16:02:52,040 INFO L226 Difference]: Without dead ends: 2921 [2021-08-12 16:02:52,042 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 283.6ms TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 16:02:52,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-08-12 16:02:52,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2253. [2021-08-12 16:02:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7921847246891653) internal successors, (6288), 2252 states have internal predecessors, (6288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6288 transitions. [2021-08-12 16:02:52,162 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6288 transitions. Word has length 75 [2021-08-12 16:02:52,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:52,162 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6288 transitions. [2021-08-12 16:02:52,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:52,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6288 transitions. [2021-08-12 16:02:52,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:02:52,165 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:52,165 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:52,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:52,377 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:52,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:52,377 INFO L82 PathProgramCache]: Analyzing trace with hash -232084574, now seen corresponding path program 38 times [2021-08-12 16:02:52,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:52,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653081123] [2021-08-12 16:02:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:52,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:52,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653081123] [2021-08-12 16:02:52,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653081123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:52,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296237736] [2021-08-12 16:02:52,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:52,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:52,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:52,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:02:52,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:52,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296237736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:52,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:52,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-12 16:02:52,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96058779] [2021-08-12 16:02:52,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:02:52,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:52,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:02:52,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:02:52,585 INFO L87 Difference]: Start difference. First operand 2253 states and 6288 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:53,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:53,372 INFO L93 Difference]: Finished difference Result 3876 states and 10583 transitions. [2021-08-12 16:02:53,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:02:53,373 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-12 16:02:53,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:53,386 INFO L225 Difference]: With dead ends: 3876 [2021-08-12 16:02:53,386 INFO L226 Difference]: Without dead ends: 3478 [2021-08-12 16:02:53,388 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 209.5ms TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 16:02:53,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-08-12 16:02:53,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2433. [2021-08-12 16:02:53,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 2432 states have (on average 2.815378289473684) internal successors, (6847), 2432 states have internal predecessors, (6847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:53,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6847 transitions. [2021-08-12 16:02:53,507 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6847 transitions. Word has length 75 [2021-08-12 16:02:53,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:53,507 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6847 transitions. [2021-08-12 16:02:53,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:53,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6847 transitions. [2021-08-12 16:02:53,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:02:53,509 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:53,509 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:53,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:53,718 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:53,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:53,719 INFO L82 PathProgramCache]: Analyzing trace with hash -209741324, now seen corresponding path program 39 times [2021-08-12 16:02:53,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:53,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680575869] [2021-08-12 16:02:53,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:53,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:53,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680575869] [2021-08-12 16:02:53,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680575869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:53,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763530374] [2021-08-12 16:02:53,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:53,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 16:02:53,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:53,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:02:53,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:54,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763530374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:54,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:54,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-12 16:02:54,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814709285] [2021-08-12 16:02:54,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:02:54,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:54,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:02:54,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:02:54,037 INFO L87 Difference]: Start difference. First operand 2433 states and 6847 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:54,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:54,840 INFO L93 Difference]: Finished difference Result 3338 states and 9233 transitions. [2021-08-12 16:02:54,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:02:54,840 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-12 16:02:54,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:54,854 INFO L225 Difference]: With dead ends: 3338 [2021-08-12 16:02:54,854 INFO L226 Difference]: Without dead ends: 2721 [2021-08-12 16:02:54,856 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 276.3ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 16:02:54,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-08-12 16:02:54,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2378. [2021-08-12 16:02:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.8115271350441735) internal successors, (6683), 2377 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:54,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6683 transitions. [2021-08-12 16:02:54,975 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6683 transitions. Word has length 75 [2021-08-12 16:02:54,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:54,975 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6683 transitions. [2021-08-12 16:02:54,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:54,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6683 transitions. [2021-08-12 16:02:54,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:02:54,977 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:54,977 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:55,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:55,181 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:55,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:55,181 INFO L82 PathProgramCache]: Analyzing trace with hash 452139800, now seen corresponding path program 40 times [2021-08-12 16:02:55,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:55,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794854541] [2021-08-12 16:02:55,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:55,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:55,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794854541] [2021-08-12 16:02:55,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794854541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:55,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252284132] [2021-08-12 16:02:55,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:55,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:02:55,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:55,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:02:55,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:55,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252284132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:55,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:55,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-12 16:02:55,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681512336] [2021-08-12 16:02:55,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:02:55,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:55,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:02:55,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:02:55,509 INFO L87 Difference]: Start difference. First operand 2378 states and 6683 transitions. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:56,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:56,148 INFO L93 Difference]: Finished difference Result 3076 states and 8463 transitions. [2021-08-12 16:02:56,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 16:02:56,149 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:02:56,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:56,163 INFO L225 Difference]: With dead ends: 3076 [2021-08-12 16:02:56,163 INFO L226 Difference]: Without dead ends: 2678 [2021-08-12 16:02:56,164 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-08-12 16:02:56,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2021-08-12 16:02:56,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 2463. [2021-08-12 16:02:56,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.7835093419983754) internal successors, (6853), 2462 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:56,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 6853 transitions. [2021-08-12 16:02:56,306 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 6853 transitions. Word has length 80 [2021-08-12 16:02:56,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:56,306 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 6853 transitions. [2021-08-12 16:02:56,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:56,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 6853 transitions. [2021-08-12 16:02:56,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:02:56,309 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:56,309 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:56,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-12 16:02:56,522 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:56,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:56,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1173866716, now seen corresponding path program 41 times [2021-08-12 16:02:56,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:56,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144946733] [2021-08-12 16:02:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:56,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:56,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144946733] [2021-08-12 16:02:56,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144946733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:56,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211984682] [2021-08-12 16:02:56,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:56,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 16:02:56,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:56,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:02:56,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:56,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211984682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:56,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:56,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-12 16:02:56,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577343027] [2021-08-12 16:02:56,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:02:56,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:56,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:02:56,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:02:56,820 INFO L87 Difference]: Start difference. First operand 2463 states and 6853 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:58,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:58,068 INFO L93 Difference]: Finished difference Result 3689 states and 9689 transitions. [2021-08-12 16:02:58,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 16:02:58,069 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:02:58,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:58,083 INFO L225 Difference]: With dead ends: 3689 [2021-08-12 16:02:58,083 INFO L226 Difference]: Without dead ends: 3291 [2021-08-12 16:02:58,084 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2021-08-12 16:02:58,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2021-08-12 16:02:58,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 2478. [2021-08-12 16:02:58,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:58,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-08-12 16:02:58,242 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-08-12 16:02:58,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:58,242 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-08-12 16:02:58,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:58,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-08-12 16:02:58,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:02:58,245 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:58,245 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:58,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:58,461 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:58,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:58,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1794345044, now seen corresponding path program 42 times [2021-08-12 16:02:58,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:58,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853511259] [2021-08-12 16:02:58,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:58,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:58,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853511259] [2021-08-12 16:02:58,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853511259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:58,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681006154] [2021-08-12 16:02:58,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:58,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 16:02:58,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:58,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:02:58,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:58,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681006154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:58,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:58,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-12 16:02:58,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499423760] [2021-08-12 16:02:58,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 16:02:58,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:58,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 16:02:58,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-12 16:02:58,703 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:00,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:00,122 INFO L93 Difference]: Finished difference Result 3574 states and 9459 transitions. [2021-08-12 16:03:00,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 16:03:00,123 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:00,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:00,134 INFO L225 Difference]: With dead ends: 3574 [2021-08-12 16:03:00,134 INFO L226 Difference]: Without dead ends: 3176 [2021-08-12 16:03:00,135 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 256.0ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-08-12 16:03:00,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-08-12 16:03:00,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2478. [2021-08-12 16:03:00,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:00,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-08-12 16:03:00,293 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-08-12 16:03:00,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:00,294 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-08-12 16:03:00,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:00,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-08-12 16:03:00,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:00,296 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:00,296 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:00,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-12 16:03:00,512 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:00,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:00,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1340128870, now seen corresponding path program 43 times [2021-08-12 16:03:00,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:00,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894593556] [2021-08-12 16:03:00,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:00,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:00,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894593556] [2021-08-12 16:03:00,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894593556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:00,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329775586] [2021-08-12 16:03:00,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:00,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:00,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:00,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329775586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:00,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:00,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-12 16:03:00,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555284645] [2021-08-12 16:03:00,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:03:00,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:00,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:03:00,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:03:00,736 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:02,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:02,045 INFO L93 Difference]: Finished difference Result 3549 states and 9409 transitions. [2021-08-12 16:03:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 16:03:02,046 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:02,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:02,057 INFO L225 Difference]: With dead ends: 3549 [2021-08-12 16:03:02,057 INFO L226 Difference]: Without dead ends: 3151 [2021-08-12 16:03:02,058 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 181.5ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-08-12 16:03:02,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-08-12 16:03:02,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2478. [2021-08-12 16:03:02,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:02,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-08-12 16:03:02,243 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-08-12 16:03:02,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:02,243 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-08-12 16:03:02,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:02,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-08-12 16:03:02,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:02,246 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:02,246 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:02,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:02,462 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:02,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:02,462 INFO L82 PathProgramCache]: Analyzing trace with hash -341232534, now seen corresponding path program 44 times [2021-08-12 16:03:02,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:02,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138565954] [2021-08-12 16:03:02,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:02,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:02,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138565954] [2021-08-12 16:03:02,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138565954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:02,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351418266] [2021-08-12 16:03:02,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:02,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:03:02,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:02,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:02,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:02,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351418266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:02,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:02,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-12 16:03:02,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177903548] [2021-08-12 16:03:02,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 16:03:02,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:02,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 16:03:02,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-12 16:03:02,797 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:04,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:04,124 INFO L93 Difference]: Finished difference Result 3499 states and 9309 transitions. [2021-08-12 16:03:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:03:04,125 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:04,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:04,136 INFO L225 Difference]: With dead ends: 3499 [2021-08-12 16:03:04,136 INFO L226 Difference]: Without dead ends: 3101 [2021-08-12 16:03:04,137 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 16:03:04,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2021-08-12 16:03:04,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 2478. [2021-08-12 16:03:04,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:04,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-08-12 16:03:04,298 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-08-12 16:03:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:04,298 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-08-12 16:03:04,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:04,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-08-12 16:03:04,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:04,300 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:04,300 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:04,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-12 16:03:04,516 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:04,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:04,516 INFO L82 PathProgramCache]: Analyzing trace with hash 2074406872, now seen corresponding path program 45 times [2021-08-12 16:03:04,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:04,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540394368] [2021-08-12 16:03:04,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:04,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:04,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540394368] [2021-08-12 16:03:04,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540394368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:04,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935445603] [2021-08-12 16:03:04,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:04,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 16:03:04,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:04,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:04,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:04,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935445603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:04,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:04,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-12 16:03:04,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469481215] [2021-08-12 16:03:04,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:03:04,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:04,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:03:04,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:03:04,738 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:05,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:05,982 INFO L93 Difference]: Finished difference Result 3449 states and 9209 transitions. [2021-08-12 16:03:05,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 16:03:05,982 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:05,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:05,996 INFO L225 Difference]: With dead ends: 3449 [2021-08-12 16:03:05,996 INFO L226 Difference]: Without dead ends: 3051 [2021-08-12 16:03:05,997 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-08-12 16:03:06,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-08-12 16:03:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 2478. [2021-08-12 16:03:06,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:06,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-08-12 16:03:06,180 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-08-12 16:03:06,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:06,180 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-08-12 16:03:06,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:06,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-08-12 16:03:06,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:06,182 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:06,182 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:06,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-12 16:03:06,390 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:06,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:06,390 INFO L82 PathProgramCache]: Analyzing trace with hash -190241112, now seen corresponding path program 46 times [2021-08-12 16:03:06,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:06,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770829384] [2021-08-12 16:03:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:06,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:06,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770829384] [2021-08-12 16:03:06,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770829384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:06,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146538987] [2021-08-12 16:03:06,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:06,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:03:06,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:06,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:06,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:06,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146538987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:06,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:06,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-12 16:03:06,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655275025] [2021-08-12 16:03:06,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 16:03:06,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:06,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 16:03:06,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-12 16:03:06,641 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:07,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:07,905 INFO L93 Difference]: Finished difference Result 3399 states and 9109 transitions. [2021-08-12 16:03:07,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 16:03:07,905 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:07,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:07,918 INFO L225 Difference]: With dead ends: 3399 [2021-08-12 16:03:07,918 INFO L226 Difference]: Without dead ends: 3001 [2021-08-12 16:03:07,919 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 281.3ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 16:03:07,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-08-12 16:03:08,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2478. [2021-08-12 16:03:08,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:08,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-08-12 16:03:08,081 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-08-12 16:03:08,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:08,082 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-08-12 16:03:08,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:08,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-08-12 16:03:08,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:08,084 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:08,084 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:08,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-12 16:03:08,300 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:08,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:08,300 INFO L82 PathProgramCache]: Analyzing trace with hash 423998358, now seen corresponding path program 47 times [2021-08-12 16:03:08,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:08,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052448422] [2021-08-12 16:03:08,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:08,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:08,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:08,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052448422] [2021-08-12 16:03:08,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052448422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:08,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100026391] [2021-08-12 16:03:08,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:08,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 16:03:08,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:08,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:08,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:08,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100026391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:08,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:08,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-12 16:03:08,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135879632] [2021-08-12 16:03:08,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:03:08,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:08,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:03:08,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:03:08,524 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:09,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:09,668 INFO L93 Difference]: Finished difference Result 3349 states and 9009 transitions. [2021-08-12 16:03:09,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 16:03:09,669 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:09,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:09,681 INFO L225 Difference]: With dead ends: 3349 [2021-08-12 16:03:09,682 INFO L226 Difference]: Without dead ends: 2951 [2021-08-12 16:03:09,683 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 209.7ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 16:03:09,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-08-12 16:03:09,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2478. [2021-08-12 16:03:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:09,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-08-12 16:03:09,842 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-08-12 16:03:09,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:09,843 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-08-12 16:03:09,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:09,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-08-12 16:03:09,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:09,845 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:09,845 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:10,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:10,057 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:10,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:10,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1291243930, now seen corresponding path program 48 times [2021-08-12 16:03:10,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:10,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914876445] [2021-08-12 16:03:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:10,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:10,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914876445] [2021-08-12 16:03:10,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914876445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:10,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161872488] [2021-08-12 16:03:10,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:10,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 16:03:10,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:10,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:10,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:10,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161872488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:10,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:10,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-12 16:03:10,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462735682] [2021-08-12 16:03:10,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 16:03:10,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:10,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 16:03:10,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-08-12 16:03:10,294 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:11,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:11,587 INFO L93 Difference]: Finished difference Result 3807 states and 10403 transitions. [2021-08-12 16:03:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 16:03:11,588 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:11,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:11,602 INFO L225 Difference]: With dead ends: 3807 [2021-08-12 16:03:11,602 INFO L226 Difference]: Without dead ends: 3056 [2021-08-12 16:03:11,605 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 331.0ms TimeCoverageRelationStatistics Valid=381, Invalid=1179, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 16:03:11,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-08-12 16:03:11,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2388. [2021-08-12 16:03:11,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.785085881860075) internal successors, (6648), 2387 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6648 transitions. [2021-08-12 16:03:11,822 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6648 transitions. Word has length 80 [2021-08-12 16:03:11,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:11,845 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6648 transitions. [2021-08-12 16:03:11,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:11,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6648 transitions. [2021-08-12 16:03:11,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:11,847 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:11,847 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:12,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:12,048 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:12,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:12,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1971075764, now seen corresponding path program 49 times [2021-08-12 16:03:12,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:12,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081696244] [2021-08-12 16:03:12,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:12,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:12,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081696244] [2021-08-12 16:03:12,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081696244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:12,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776303268] [2021-08-12 16:03:12,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:12,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:12,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:12,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776303268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:12,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:12,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-12 16:03:12,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441055276] [2021-08-12 16:03:12,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:03:12,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:12,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:03:12,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:03:12,292 INFO L87 Difference]: Start difference. First operand 2388 states and 6648 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:13,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:13,441 INFO L93 Difference]: Finished difference Result 4036 states and 10993 transitions. [2021-08-12 16:03:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:03:13,442 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:13,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:13,453 INFO L225 Difference]: With dead ends: 4036 [2021-08-12 16:03:13,453 INFO L226 Difference]: Without dead ends: 3638 [2021-08-12 16:03:13,454 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 242.6ms TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 16:03:13,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2021-08-12 16:03:13,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 2568. [2021-08-12 16:03:13,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.8075574600701207) internal successors, (7207), 2567 states have internal predecessors, (7207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:13,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 7207 transitions. [2021-08-12 16:03:13,606 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 7207 transitions. Word has length 80 [2021-08-12 16:03:13,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:13,606 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 7207 transitions. [2021-08-12 16:03:13,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:13,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 7207 transitions. [2021-08-12 16:03:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:13,608 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:13,608 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:13,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-08-12 16:03:13,824 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:13,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:13,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1993419014, now seen corresponding path program 50 times [2021-08-12 16:03:13,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:13,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123974666] [2021-08-12 16:03:13,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:13,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:13,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123974666] [2021-08-12 16:03:13,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123974666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:13,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675684030] [2021-08-12 16:03:13,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:13,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:03:13,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:13,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:13,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:14,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675684030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:14,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:14,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-12 16:03:14,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347560295] [2021-08-12 16:03:14,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 16:03:14,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:14,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 16:03:14,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-12 16:03:14,036 INFO L87 Difference]: Start difference. First operand 2568 states and 7207 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:15,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:15,206 INFO L93 Difference]: Finished difference Result 3331 states and 9117 transitions. [2021-08-12 16:03:15,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 16:03:15,206 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:15,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:15,221 INFO L225 Difference]: With dead ends: 3331 [2021-08-12 16:03:15,221 INFO L226 Difference]: Without dead ends: 2831 [2021-08-12 16:03:15,223 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 364.4ms TimeCoverageRelationStatistics Valid=416, Invalid=1066, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 16:03:15,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2021-08-12 16:03:15,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 2483. [2021-08-12 16:03:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2483 states, 2482 states have (on average 2.78928283642224) internal successors, (6923), 2482 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:15,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2483 states to 2483 states and 6923 transitions. [2021-08-12 16:03:15,389 INFO L78 Accepts]: Start accepts. Automaton has 2483 states and 6923 transitions. Word has length 80 [2021-08-12 16:03:15,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:15,389 INFO L482 AbstractCegarLoop]: Abstraction has 2483 states and 6923 transitions. [2021-08-12 16:03:15,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:15,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2483 states and 6923 transitions. [2021-08-12 16:03:15,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:15,392 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:15,392 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:15,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-08-12 16:03:15,605 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:15,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:15,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1150498713, now seen corresponding path program 51 times [2021-08-12 16:03:15,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:15,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044499422] [2021-08-12 16:03:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 77 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:15,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:15,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044499422] [2021-08-12 16:03:15,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044499422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:15,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840236375] [2021-08-12 16:03:15,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:15,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 16:03:15,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:15,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 16:03:15,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:15,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840236375] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:03:15,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-12 16:03:15,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-08-12 16:03:15,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242556159] [2021-08-12 16:03:15,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:03:15,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:15,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:03:15,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:03:15,964 INFO L87 Difference]: Start difference. First operand 2483 states and 6923 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:17,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:17,485 INFO L93 Difference]: Finished difference Result 8090 states and 22607 transitions. [2021-08-12 16:03:17,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 16:03:17,486 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-12 16:03:17,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:17,496 INFO L225 Difference]: With dead ends: 8090 [2021-08-12 16:03:17,496 INFO L226 Difference]: Without dead ends: 1279 [2021-08-12 16:03:17,501 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-08-12 16:03:17,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-08-12 16:03:17,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1279. [2021-08-12 16:03:17,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1278 states have (on average 2.5610328638497655) internal successors, (3273), 1278 states have internal predecessors, (3273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:17,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 3273 transitions. [2021-08-12 16:03:17,530 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 3273 transitions. Word has length 85 [2021-08-12 16:03:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:17,530 INFO L482 AbstractCegarLoop]: Abstraction has 1279 states and 3273 transitions. [2021-08-12 16:03:17,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:17,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 3273 transitions. [2021-08-12 16:03:17,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:17,531 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:17,531 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:17,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:17,745 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:17,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:17,746 INFO L82 PathProgramCache]: Analyzing trace with hash -489817904, now seen corresponding path program 52 times [2021-08-12 16:03:17,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:17,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241477974] [2021-08-12 16:03:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 81 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:17,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:17,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241477974] [2021-08-12 16:03:17,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241477974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:17,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484142928] [2021-08-12 16:03:17,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:17,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:03:17,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:17,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 16:03:17,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:17,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484142928] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:03:17,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-12 16:03:17,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-08-12 16:03:17,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282250803] [2021-08-12 16:03:17,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:03:17,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:17,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:03:17,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:03:17,959 INFO L87 Difference]: Start difference. First operand 1279 states and 3273 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:18,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:18,124 INFO L93 Difference]: Finished difference Result 3475 states and 8823 transitions. [2021-08-12 16:03:18,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 16:03:18,124 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-12 16:03:18,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:18,135 INFO L225 Difference]: With dead ends: 3475 [2021-08-12 16:03:18,135 INFO L226 Difference]: Without dead ends: 0 [2021-08-12 16:03:18,138 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-08-12 16:03:18,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-12 16:03:18,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-12 16:03:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-12 16:03:18,143 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 85 [2021-08-12 16:03:18,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:18,144 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-12 16:03:18,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:18,144 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-12 16:03:18,144 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-12 16:03:18,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-12 16:03:18,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-12 16:03:19,038 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 110 [2021-08-12 16:03:19,515 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 110 [2021-08-12 16:03:19,693 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 107 [2021-08-12 16:03:38,438 WARN L205 SmtUtils]: Spent 18.35 s on a formula simplification. DAG size of input: 1504 DAG size of output: 893 [2021-08-12 16:03:38,680 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 107 [2021-08-12 16:03:56,868 WARN L205 SmtUtils]: Spent 17.85 s on a formula simplification. DAG size of input: 1504 DAG size of output: 893 [2021-08-12 16:03:58,928 WARN L205 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 279 DAG size of output: 85 [2021-08-12 16:04:16,080 WARN L205 SmtUtils]: Spent 17.06 s on a formula simplification. DAG size of input: 1474 DAG size of output: 865 [2021-08-12 16:04:34,320 WARN L205 SmtUtils]: Spent 17.89 s on a formula simplification. DAG size of input: 1362 DAG size of output: 846 [2021-08-12 16:04:51,193 WARN L205 SmtUtils]: Spent 16.76 s on a formula simplification. DAG size of input: 1474 DAG size of output: 865 [2021-08-12 16:04:53,193 WARN L205 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 279 DAG size of output: 85 [2021-08-12 16:04:54,989 WARN L205 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 272 DAG size of output: 82 [2021-08-12 16:05:11,101 WARN L205 SmtUtils]: Spent 16.09 s on a formula simplification. DAG size of input: 1261 DAG size of output: 729 [2021-08-12 16:05:29,833 WARN L205 SmtUtils]: Spent 18.44 s on a formula simplification. DAG size of input: 1362 DAG size of output: 846 [2021-08-12 16:05:46,042 WARN L205 SmtUtils]: Spent 16.08 s on a formula simplification. DAG size of input: 1333 DAG size of output: 815 [2021-08-12 16:06:02,355 WARN L205 SmtUtils]: Spent 16.26 s on a formula simplification. DAG size of input: 1261 DAG size of output: 729 [2021-08-12 16:06:04,242 WARN L205 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 272 DAG size of output: 82 [2021-08-12 16:06:06,238 WARN L205 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 279 DAG size of output: 85 [2021-08-12 16:06:07,840 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 267 DAG size of output: 79 [2021-08-12 16:06:22,737 WARN L205 SmtUtils]: Spent 14.87 s on a formula simplification. DAG size of input: 1267 DAG size of output: 732 [2021-08-12 16:06:41,165 WARN L205 SmtUtils]: Spent 18.30 s on a formula simplification. DAG size of input: 1362 DAG size of output: 846 [2021-08-12 16:06:57,174 WARN L205 SmtUtils]: Spent 15.88 s on a formula simplification. DAG size of input: 1333 DAG size of output: 815 [2021-08-12 16:07:13,041 WARN L205 SmtUtils]: Spent 15.81 s on a formula simplification. DAG size of input: 1248 DAG size of output: 728 [2021-08-12 16:07:28,546 WARN L205 SmtUtils]: Spent 15.41 s on a formula simplification. DAG size of input: 1267 DAG size of output: 732 [2021-08-12 16:07:30,152 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 267 DAG size of output: 79 [2021-08-12 16:07:31,963 WARN L205 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 272 DAG size of output: 82 [2021-08-12 16:07:33,580 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 269 DAG size of output: 81 [2021-08-12 16:07:48,882 WARN L205 SmtUtils]: Spent 15.28 s on a formula simplification. DAG size of input: 1267 DAG size of output: 729 [2021-08-12 16:08:04,921 WARN L205 SmtUtils]: Spent 15.95 s on a formula simplification. DAG size of input: 1333 DAG size of output: 815 [2021-08-12 16:08:20,784 WARN L205 SmtUtils]: Spent 15.80 s on a formula simplification. DAG size of input: 1248 DAG size of output: 728 [2021-08-12 16:08:36,298 WARN L205 SmtUtils]: Spent 15.42 s on a formula simplification. DAG size of input: 1254 DAG size of output: 731 [2021-08-12 16:08:51,479 WARN L205 SmtUtils]: Spent 15.13 s on a formula simplification. DAG size of input: 1267 DAG size of output: 729 [2021-08-12 16:08:53,059 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 267 DAG size of output: 79 [2021-08-12 16:08:54,635 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 269 DAG size of output: 81 [2021-08-12 16:08:56,238 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 269 DAG size of output: 81 [2021-08-12 16:09:12,459 WARN L205 SmtUtils]: Spent 16.20 s on a formula simplification. DAG size of input: 1248 DAG size of output: 728 [2021-08-12 16:09:27,935 WARN L205 SmtUtils]: Spent 15.38 s on a formula simplification. DAG size of input: 1254 DAG size of output: 731 [2021-08-12 16:09:42,838 WARN L205 SmtUtils]: Spent 14.85 s on a formula simplification. DAG size of input: 1254 DAG size of output: 728 [2021-08-12 16:09:44,422 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 269 DAG size of output: 81 [2021-08-12 16:09:45,991 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 269 DAG size of output: 81 [2021-08-12 16:10:01,417 WARN L205 SmtUtils]: Spent 15.38 s on a formula simplification. DAG size of input: 1254 DAG size of output: 731 [2021-08-12 16:10:16,354 WARN L205 SmtUtils]: Spent 14.88 s on a formula simplification. DAG size of input: 1254 DAG size of output: 728 [2021-08-12 16:10:17,950 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 269 DAG size of output: 81 [2021-08-12 16:10:32,496 WARN L205 SmtUtils]: Spent 14.51 s on a formula simplification. DAG size of input: 1254 DAG size of output: 728 [2021-08-12 16:10:34,600 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 69 [2021-08-12 16:10:35,266 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 66 [2021-08-12 16:10:35,751 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 69 [2021-08-12 16:10:36,132 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 63 [2021-08-12 16:10:36,536 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 18 [2021-08-12 16:10:37,063 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 66 [2021-08-12 16:10:37,395 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 66 [2021-08-12 16:10:37,731 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-08-12 16:10:38,307 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 63 [2021-08-12 16:10:38,708 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 69 [2021-08-12 16:10:39,110 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 62 [2021-08-12 16:10:39,401 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 18 [2021-08-12 16:10:39,715 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 18 [2021-08-12 16:10:40,264 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 72 [2021-08-12 16:10:40,628 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 66 [2021-08-12 16:10:40,947 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 59 [2021-08-12 16:10:41,258 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-08-12 16:10:41,590 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 66 [2021-08-12 16:10:41,936 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 58 [2021-08-12 16:10:42,727 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 62 [2021-08-12 16:10:43,054 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 63 [2021-08-12 16:10:50,614 WARN L205 SmtUtils]: Spent 7.56 s on a formula simplification. DAG size of input: 866 DAG size of output: 65 [2021-08-12 16:10:51,100 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 68 [2021-08-12 16:10:51,398 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 18 [2021-08-12 16:10:52,054 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 72 [2021-08-12 16:10:52,468 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 72 [2021-08-12 16:10:52,836 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2021-08-12 16:10:53,169 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 59 [2021-08-12 16:10:53,544 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 66 [2021-08-12 16:10:53,941 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 61 [2021-08-12 16:10:54,259 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 58 [2021-08-12 16:10:54,542 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-08-12 16:11:01,763 WARN L205 SmtUtils]: Spent 7.22 s on a formula simplification. DAG size of input: 866 DAG size of output: 65 [2021-08-12 16:11:02,155 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 64 [2021-08-12 16:11:02,751 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 16 [2021-08-12 16:11:03,249 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 62 [2021-08-12 16:11:03,647 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 68 [2021-08-12 16:11:10,938 WARN L205 SmtUtils]: Spent 7.29 s on a formula simplification. DAG size of input: 839 DAG size of output: 59 [2021-08-12 16:11:11,376 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 68 [2021-08-12 16:11:11,934 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 72 [2021-08-12 16:11:12,269 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 66 [2021-08-12 16:11:12,632 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2021-08-12 16:11:13,057 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 72 [2021-08-12 16:11:13,486 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 67 [2021-08-12 16:11:13,750 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 61 [2021-08-12 16:11:13,939 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 59 [2021-08-12 16:11:21,417 WARN L205 SmtUtils]: Spent 7.47 s on a formula simplification. DAG size of input: 834 DAG size of output: 60 [2021-08-12 16:11:21,896 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 67 [2021-08-12 16:11:22,216 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 58 [2021-08-12 16:11:22,563 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 64 [2021-08-12 16:11:30,036 WARN L205 SmtUtils]: Spent 7.47 s on a formula simplification. DAG size of input: 839 DAG size of output: 59 [2021-08-12 16:11:30,457 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 65 [2021-08-12 16:11:30,704 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 16 [2021-08-12 16:11:37,058 WARN L205 SmtUtils]: Spent 5.67 s on a formula simplification. DAG size of input: 709 DAG size of output: 52 [2021-08-12 16:11:37,414 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 68 [2021-08-12 16:11:37,793 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 68 [2021-08-12 16:11:38,369 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 66 [2021-08-12 16:11:38,795 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 72 [2021-08-12 16:11:39,220 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 68 [2021-08-12 16:11:39,624 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 67 [2021-08-12 16:11:39,980 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2021-08-12 16:11:47,386 WARN L205 SmtUtils]: Spent 7.40 s on a formula simplification. DAG size of input: 834 DAG size of output: 60 [2021-08-12 16:11:47,925 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 73 [2021-08-12 16:11:48,300 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 61 [2021-08-12 16:11:48,677 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 67 Received shutdown request... [2021-08-12 16:11:54,477 WARN L222 SmtUtils]: Removed 2 from assertion stack [2021-08-12 16:11:54,477 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2021-08-12 16:11:54,482 INFO L168 Benchmark]: Toolchain (without parser) took 585097.60 ms. Allocated memory was 181.4 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 144.1 MB in the beginning and 986.2 MB in the end (delta: -842.1 MB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-08-12 16:11:54,482 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 181.4 MB. Free memory is still 162.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 16:11:54,482 INFO L168 Benchmark]: CACSL2BoogieTranslator took 427.82 ms. Allocated memory is still 181.4 MB. Free memory was 143.8 MB in the beginning and 145.0 MB in the end (delta: -1.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-08-12 16:11:54,482 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.55 ms. Allocated memory is still 181.4 MB. Free memory was 145.0 MB in the beginning and 143.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-12 16:11:54,482 INFO L168 Benchmark]: Boogie Preprocessor took 13.39 ms. Allocated memory is still 181.4 MB. Free memory was 143.3 MB in the beginning and 141.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 16:11:54,482 INFO L168 Benchmark]: RCFGBuilder took 283.54 ms. Allocated memory is still 181.4 MB. Free memory was 141.9 MB in the beginning and 163.0 MB in the end (delta: -21.1 MB). Peak memory consumption was 23.9 MB. Max. memory is 8.0 GB. [2021-08-12 16:11:54,482 INFO L168 Benchmark]: TraceAbstraction took 584341.74 ms. Allocated memory was 181.4 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 162.2 MB in the beginning and 986.2 MB in the end (delta: -824.0 MB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-08-12 16:11:54,483 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 181.4 MB. Free memory is still 162.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 427.82 ms. Allocated memory is still 181.4 MB. Free memory was 143.8 MB in the beginning and 145.0 MB in the end (delta: -1.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.55 ms. Allocated memory is still 181.4 MB. Free memory was 145.0 MB in the beginning and 143.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.39 ms. Allocated memory is still 181.4 MB. Free memory was 143.3 MB in the beginning and 141.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 283.54 ms. Allocated memory is still 181.4 MB. Free memory was 141.9 MB in the beginning and 163.0 MB in the end (delta: -21.1 MB). Peak memory consumption was 23.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 584341.74 ms. Allocated memory was 181.4 MB in the beginning and 1.8 GB in the end (delta: 1.6 GB). Free memory was 162.2 MB in the beginning and 986.2 MB in the end (delta: -824.0 MB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while SimplifyDDAWithTimeout was simplifying term of DAG size 801 for 5793ms.. RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown