/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-New_States.epf -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-12 09:40:14,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-12 09:40:14,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-12 09:40:14,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-12 09:40:14,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-12 09:40:14,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-12 09:40:14,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-12 09:40:14,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-12 09:40:14,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-12 09:40:14,929 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-12 09:40:14,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-12 09:40:14,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-12 09:40:14,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-12 09:40:14,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-12 09:40:14,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-12 09:40:14,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-12 09:40:14,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-12 09:40:14,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-12 09:40:14,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-12 09:40:14,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-12 09:40:14,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-12 09:40:14,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-12 09:40:14,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-12 09:40:14,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-12 09:40:14,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-12 09:40:14,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-12 09:40:14,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-12 09:40:14,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-12 09:40:14,986 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-12 09:40:14,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-12 09:40:14,987 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-12 09:40:14,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-12 09:40:14,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-12 09:40:14,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-12 09:40:14,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-12 09:40:14,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-12 09:40:14,991 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-New_States.epf [2020-11-12 09:40:15,041 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-12 09:40:15,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-12 09:40:15,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-12 09:40:15,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-12 09:40:15,047 INFO L138 SettingsManager]: * Use SBE=true [2020-11-12 09:40:15,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-12 09:40:15,048 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-12 09:40:15,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-12 09:40:15,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-12 09:40:15,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-12 09:40:15,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-12 09:40:15,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-12 09:40:15,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-12 09:40:15,050 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-12 09:40:15,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-12 09:40:15,051 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-12 09:40:15,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-12 09:40:15,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-12 09:40:15,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-12 09:40:15,051 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-12 09:40:15,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-12 09:40:15,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-12 09:40:15,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-12 09:40:15,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-12 09:40:15,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-12 09:40:15,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-12 09:40:15,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-12 09:40:15,053 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-11-12 09:40:15,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-12 09:40:15,054 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-12 09:40:15,054 INFO L138 SettingsManager]: * Sleep set reduction in concurrent analysis=NEW_STATES 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-12 09:40:15,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-12 09:40:15,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-12 09:40:15,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-12 09:40:15,440 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-12 09:40:15,441 INFO L275 PluginConnector]: CDTParser initialized [2020-11-12 09:40:15,442 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2020-11-12 09:40:15,513 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a964d900d/b5dbc541a521430ea4c6ad5463abaa94/FLAGe00eb6247 [2020-11-12 09:40:16,310 INFO L306 CDTParser]: Found 1 translation units. [2020-11-12 09:40:16,311 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2020-11-12 09:40:16,326 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a964d900d/b5dbc541a521430ea4c6ad5463abaa94/FLAGe00eb6247 [2020-11-12 09:40:16,531 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a964d900d/b5dbc541a521430ea4c6ad5463abaa94 [2020-11-12 09:40:16,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-12 09:40:16,547 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-12 09:40:16,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-12 09:40:16,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-12 09:40:16,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-12 09:40:16,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 09:40:16" (1/1) ... [2020-11-12 09:40:16,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a30fcb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:16, skipping insertion in model container [2020-11-12 09:40:16,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 09:40:16" (1/1) ... [2020-11-12 09:40:16,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-12 09:40:16,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-12 09:40:17,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-12 09:40:17,045 INFO L203 MainTranslator]: Completed pre-run [2020-11-12 09:40:17,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-12 09:40:17,277 INFO L208 MainTranslator]: Completed translation [2020-11-12 09:40:17,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:17 WrapperNode [2020-11-12 09:40:17,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-12 09:40:17,280 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-12 09:40:17,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-12 09:40:17,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-12 09:40:17,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:17" (1/1) ... [2020-11-12 09:40:17,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:17" (1/1) ... [2020-11-12 09:40:17,359 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-12 09:40:17,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-12 09:40:17,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-12 09:40:17,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-12 09:40:17,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:17" (1/1) ... [2020-11-12 09:40:17,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:17" (1/1) ... [2020-11-12 09:40:17,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:17" (1/1) ... [2020-11-12 09:40:17,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:17" (1/1) ... [2020-11-12 09:40:17,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:17" (1/1) ... [2020-11-12 09:40:17,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:17" (1/1) ... [2020-11-12 09:40:17,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:17" (1/1) ... [2020-11-12 09:40:17,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-12 09:40:17,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-12 09:40:17,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-12 09:40:17,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-12 09:40:17,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-12 09:40:17,463 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-12 09:40:17,464 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-12 09:40:17,465 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-12 09:40:17,465 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-12 09:40:17,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-12 09:40:17,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-12 09:40:17,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-12 09:40:17,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-12 09:40:17,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-12 09:40:17,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-12 09:40:17,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-12 09:40:17,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-12 09:40:17,472 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-12 09:40:17,886 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-12 09:40:17,886 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-12 09:40:17,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 09:40:17 BoogieIcfgContainer [2020-11-12 09:40:17,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-12 09:40:17,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-12 09:40:17,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-12 09:40:17,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-12 09:40:17,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 09:40:16" (1/3) ... [2020-11-12 09:40:17,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbcc5fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 09:40:17, skipping insertion in model container [2020-11-12 09:40:17,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 09:40:17" (2/3) ... [2020-11-12 09:40:17,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbcc5fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 09:40:17, skipping insertion in model container [2020-11-12 09:40:17,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 09:40:17" (3/3) ... [2020-11-12 09:40:17,899 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2020-11-12 09:40:17,912 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-12 09:40:17,912 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-12 09:40:17,916 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-12 09:40:17,916 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-12 09:40:17,944 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,944 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,945 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,945 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,945 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,945 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,945 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,946 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,946 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,947 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,947 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,947 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,948 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,948 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,948 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,948 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,948 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,949 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,949 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,949 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,950 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,950 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,950 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,950 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,950 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,951 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,951 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,951 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,952 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,952 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,952 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,952 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,953 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,953 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,953 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,953 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,954 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,954 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,954 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,954 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,955 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,955 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,955 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,955 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,956 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,956 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,956 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,956 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,957 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,957 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,957 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,957 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,958 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,958 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,958 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,958 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,961 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,961 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,961 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,962 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,962 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,962 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,968 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,968 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,968 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,969 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,969 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,969 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 09:40:17,971 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-12 09:40:17,984 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-12 09:40:18,019 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-12 09:40:18,019 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-12 09:40:18,019 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-12 09:40:18,019 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-12 09:40:18,020 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-12 09:40:18,020 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-12 09:40:18,020 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-12 09:40:18,020 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-12 09:40:18,031 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 64 transitions, 138 flow [2020-11-12 09:40:18,166 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 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) [2020-11-12 09:40:18,406 WARN L455 BasicCegarLoop]: Sleep Set Reduction Time: 237ms [2020-11-12 09:40:18,412 WARN L456 BasicCegarLoop]: Sleep set: input automaton has 1848 states, 1846 states have (on average 3.2183098591549295) internal successors, (5941), 1847 states have internal predecessors, (5941), 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) [2020-11-12 09:40:18,427 WARN L457 BasicCegarLoop]: Sleep set: output automaton has 6412 states, 5723 states have (on average 1.2081076358553207) internal successors, (6914), 6411 states have internal predecessors, (6914), 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) [2020-11-12 09:40:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 6412 states, 5723 states have (on average 1.2081076358553207) internal successors, (6914), 6411 states have internal predecessors, (6914), 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) [2020-11-12 09:40:18,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-12 09:40:18,454 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:18,455 INFO L494 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] [2020-11-12 09:40:18,458 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:18,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:18,465 INFO L82 PathProgramCache]: Analyzing trace with hash 27863943, now seen corresponding path program 1 times [2020-11-12 09:40:18,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:18,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76269955] [2020-11-12 09:40:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:18,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76269955] [2020-11-12 09:40:18,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:40:18,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-12 09:40:18,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017203098] [2020-11-12 09:40:18,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-12 09:40:18,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:18,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-12 09:40:18,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-12 09:40:18,943 INFO L87 Difference]: Start difference. First operand has 6412 states, 5723 states have (on average 1.2081076358553207) internal successors, (6914), 6411 states have internal predecessors, (6914), 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 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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) [2020-11-12 09:40:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:19,089 INFO L93 Difference]: Finished difference Result 3940 states and 4629 transitions. [2020-11-12 09:40:19,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-12 09:40:19,091 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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 28 [2020-11-12 09:40:19,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:19,115 INFO L225 Difference]: With dead ends: 3940 [2020-11-12 09:40:19,115 INFO L226 Difference]: Without dead ends: 1540 [2020-11-12 09:40:19,117 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-12 09:40:19,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2020-11-12 09:40:19,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 922. [2020-11-12 09:40:19,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 842 states have (on average 1.4239904988123515) internal successors, (1199), 921 states have internal predecessors, (1199), 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) [2020-11-12 09:40:19,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1199 transitions. [2020-11-12 09:40:19,224 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1199 transitions. Word has length 28 [2020-11-12 09:40:19,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:19,225 INFO L481 AbstractCegarLoop]: Abstraction has 922 states and 1199 transitions. [2020-11-12 09:40:19,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 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) [2020-11-12 09:40:19,225 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1199 transitions. [2020-11-12 09:40:19,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-12 09:40:19,227 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:19,227 INFO L494 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] [2020-11-12 09:40:19,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-12 09:40:19,228 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:19,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:19,229 INFO L82 PathProgramCache]: Analyzing trace with hash 168146404, now seen corresponding path program 1 times [2020-11-12 09:40:19,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:19,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692639200] [2020-11-12 09:40:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:19,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692639200] [2020-11-12 09:40:19,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:40:19,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-12 09:40:19,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037879765] [2020-11-12 09:40:19,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-12 09:40:19,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:19,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-12 09:40:19,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-12 09:40:19,403 INFO L87 Difference]: Start difference. First operand 922 states and 1199 transitions. 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) [2020-11-12 09:40:19,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:19,508 INFO L93 Difference]: Finished difference Result 1179 states and 1471 transitions. [2020-11-12 09:40:19,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-12 09:40:19,508 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 [2020-11-12 09:40:19,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:19,513 INFO L225 Difference]: With dead ends: 1179 [2020-11-12 09:40:19,513 INFO L226 Difference]: Without dead ends: 803 [2020-11-12 09:40:19,514 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-11-12 09:40:19,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2020-11-12 09:40:19,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 781. [2020-11-12 09:40:19,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 717 states have (on average 1.4546722454672245) internal successors, (1043), 780 states have internal predecessors, (1043), 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) [2020-11-12 09:40:19,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1043 transitions. [2020-11-12 09:40:19,539 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1043 transitions. Word has length 32 [2020-11-12 09:40:19,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:19,540 INFO L481 AbstractCegarLoop]: Abstraction has 781 states and 1043 transitions. [2020-11-12 09:40:19,540 INFO L482 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) [2020-11-12 09:40:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1043 transitions. [2020-11-12 09:40:19,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-12 09:40:19,542 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:19,542 INFO L494 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] [2020-11-12 09:40:19,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-12 09:40:19,542 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:19,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:19,543 INFO L82 PathProgramCache]: Analyzing trace with hash -470623983, now seen corresponding path program 1 times [2020-11-12 09:40:19,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:19,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44021002] [2020-11-12 09:40:19,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:19,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44021002] [2020-11-12 09:40:19,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:40:19,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-12 09:40:19,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124449224] [2020-11-12 09:40:19,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-12 09:40:19,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:19,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-12 09:40:19,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-12 09:40:19,760 INFO L87 Difference]: Start difference. First operand 781 states and 1043 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2020-11-12 09:40:19,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:19,881 INFO L93 Difference]: Finished difference Result 1609 states and 1963 transitions. [2020-11-12 09:40:19,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-12 09:40:19,882 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 [2020-11-12 09:40:19,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:19,889 INFO L225 Difference]: With dead ends: 1609 [2020-11-12 09:40:19,889 INFO L226 Difference]: Without dead ends: 1395 [2020-11-12 09:40:19,889 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-11-12 09:40:19,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2020-11-12 09:40:19,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 834. [2020-11-12 09:40:19,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 770 states have (on average 1.4376623376623376) internal successors, (1107), 833 states have internal predecessors, (1107), 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) [2020-11-12 09:40:19,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1107 transitions. [2020-11-12 09:40:19,915 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1107 transitions. Word has length 36 [2020-11-12 09:40:19,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:19,916 INFO L481 AbstractCegarLoop]: Abstraction has 834 states and 1107 transitions. [2020-11-12 09:40:19,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2020-11-12 09:40:19,916 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1107 transitions. [2020-11-12 09:40:19,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-12 09:40:19,917 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:19,918 INFO L494 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] [2020-11-12 09:40:19,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-12 09:40:19,918 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:19,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:19,919 INFO L82 PathProgramCache]: Analyzing trace with hash 661466183, now seen corresponding path program 2 times [2020-11-12 09:40:19,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:19,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971668191] [2020-11-12 09:40:19,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:20,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971668191] [2020-11-12 09:40:20,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:40:20,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-12 09:40:20,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13452352] [2020-11-12 09:40:20,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-12 09:40:20,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:20,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-12 09:40:20,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-12 09:40:20,037 INFO L87 Difference]: Start difference. First operand 834 states and 1107 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2020-11-12 09:40:20,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:20,205 INFO L93 Difference]: Finished difference Result 1148 states and 1503 transitions. [2020-11-12 09:40:20,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-12 09:40:20,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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 [2020-11-12 09:40:20,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:20,210 INFO L225 Difference]: With dead ends: 1148 [2020-11-12 09:40:20,210 INFO L226 Difference]: Without dead ends: 892 [2020-11-12 09:40:20,211 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-11-12 09:40:20,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2020-11-12 09:40:20,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 860. [2020-11-12 09:40:20,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 796 states have (on average 1.434673366834171) internal successors, (1142), 859 states have internal predecessors, (1142), 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) [2020-11-12 09:40:20,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1142 transitions. [2020-11-12 09:40:20,234 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1142 transitions. Word has length 36 [2020-11-12 09:40:20,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:20,234 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1142 transitions. [2020-11-12 09:40:20,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2020-11-12 09:40:20,234 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1142 transitions. [2020-11-12 09:40:20,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-12 09:40:20,235 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:20,236 INFO L494 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] [2020-11-12 09:40:20,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-12 09:40:20,236 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:20,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:20,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1267275225, now seen corresponding path program 3 times [2020-11-12 09:40:20,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:20,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947626531] [2020-11-12 09:40:20,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:20,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:20,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947626531] [2020-11-12 09:40:20,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 09:40:20,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-12 09:40:20,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622545334] [2020-11-12 09:40:20,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-12 09:40:20,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:20,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-12 09:40:20,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-12 09:40:20,367 INFO L87 Difference]: Start difference. First operand 860 states and 1142 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2020-11-12 09:40:20,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:20,501 INFO L93 Difference]: Finished difference Result 1268 states and 1575 transitions. [2020-11-12 09:40:20,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-12 09:40:20,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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 [2020-11-12 09:40:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:20,506 INFO L225 Difference]: With dead ends: 1268 [2020-11-12 09:40:20,507 INFO L226 Difference]: Without dead ends: 854 [2020-11-12 09:40:20,507 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-11-12 09:40:20,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2020-11-12 09:40:20,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 834. [2020-11-12 09:40:20,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 770 states have (on average 1.4428571428571428) internal successors, (1111), 833 states have internal predecessors, (1111), 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) [2020-11-12 09:40:20,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1111 transitions. [2020-11-12 09:40:20,529 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1111 transitions. Word has length 36 [2020-11-12 09:40:20,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:20,529 INFO L481 AbstractCegarLoop]: Abstraction has 834 states and 1111 transitions. [2020-11-12 09:40:20,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 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) [2020-11-12 09:40:20,530 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1111 transitions. [2020-11-12 09:40:20,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-12 09:40:20,531 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:20,531 INFO L494 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] [2020-11-12 09:40:20,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-12 09:40:20,531 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:20,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:20,532 INFO L82 PathProgramCache]: Analyzing trace with hash -733270170, now seen corresponding path program 1 times [2020-11-12 09:40:20,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:20,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709496822] [2020-11-12 09:40:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:20,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709496822] [2020-11-12 09:40:20,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192548480] [2020-11-12 09:40:20,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:20,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-12 09:40:20,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:20,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:20,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:20,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:20,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-12 09:40:20,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481071208] [2020-11-12 09:40:20,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-12 09:40:20,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:20,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-12 09:40:20,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-12 09:40:20,993 INFO L87 Difference]: Start difference. First operand 834 states and 1111 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) [2020-11-12 09:40:21,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:21,172 INFO L93 Difference]: Finished difference Result 1104 states and 1398 transitions. [2020-11-12 09:40:21,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-12 09:40:21,175 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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 41 [2020-11-12 09:40:21,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:21,179 INFO L225 Difference]: With dead ends: 1104 [2020-11-12 09:40:21,179 INFO L226 Difference]: Without dead ends: 890 [2020-11-12 09:40:21,180 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-11-12 09:40:21,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-11-12 09:40:21,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 832. [2020-11-12 09:40:21,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 768 states have (on average 1.4427083333333333) internal successors, (1108), 831 states have internal predecessors, (1108), 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) [2020-11-12 09:40:21,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1108 transitions. [2020-11-12 09:40:21,207 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1108 transitions. Word has length 41 [2020-11-12 09:40:21,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:21,207 INFO L481 AbstractCegarLoop]: Abstraction has 832 states and 1108 transitions. [2020-11-12 09:40:21,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 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) [2020-11-12 09:40:21,207 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1108 transitions. [2020-11-12 09:40:21,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-12 09:40:21,208 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:21,208 INFO L494 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] [2020-11-12 09:40:21,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-12 09:40:21,419 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:21,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:21,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1717865532, now seen corresponding path program 2 times [2020-11-12 09:40:21,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:21,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686889232] [2020-11-12 09:40:21,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:21,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:21,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686889232] [2020-11-12 09:40:21,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736727270] [2020-11-12 09:40:21,529 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 [2020-11-12 09:40:21,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:40:21,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:21,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 09:40:21,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:21,643 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:21,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:21,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-11-12 09:40:21,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560188821] [2020-11-12 09:40:21,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-12 09:40:21,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:21,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-12 09:40:21,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-12 09:40:21,653 INFO L87 Difference]: Start difference. First operand 832 states and 1108 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 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) [2020-11-12 09:40:21,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:21,981 INFO L93 Difference]: Finished difference Result 1663 states and 1992 transitions. [2020-11-12 09:40:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-12 09:40:21,981 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 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 41 [2020-11-12 09:40:21,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:21,990 INFO L225 Difference]: With dead ends: 1663 [2020-11-12 09:40:21,991 INFO L226 Difference]: Without dead ends: 929 [2020-11-12 09:40:21,991 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2020-11-12 09:40:21,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2020-11-12 09:40:22,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 846. [2020-11-12 09:40:22,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 782 states have (on average 1.4398976982097187) internal successors, (1126), 845 states have internal predecessors, (1126), 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) [2020-11-12 09:40:22,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1126 transitions. [2020-11-12 09:40:22,021 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1126 transitions. Word has length 41 [2020-11-12 09:40:22,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:22,029 INFO L481 AbstractCegarLoop]: Abstraction has 846 states and 1126 transitions. [2020-11-12 09:40:22,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 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) [2020-11-12 09:40:22,030 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1126 transitions. [2020-11-12 09:40:22,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-12 09:40:22,033 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:22,034 INFO L494 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] [2020-11-12 09:40:22,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:22,248 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:22,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:22,249 INFO L82 PathProgramCache]: Analyzing trace with hash 376014513, now seen corresponding path program 1 times [2020-11-12 09:40:22,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:22,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060246873] [2020-11-12 09:40:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:22,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060246873] [2020-11-12 09:40:22,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778772858] [2020-11-12 09:40:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:22,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-12 09:40:22,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:22,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:22,527 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:22,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:22,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-12 09:40:22,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464843167] [2020-11-12 09:40:22,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-12 09:40:22,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:22,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-12 09:40:22,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-12 09:40:22,536 INFO L87 Difference]: Start difference. First operand 846 states and 1126 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 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) [2020-11-12 09:40:22,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:22,659 INFO L93 Difference]: Finished difference Result 1217 states and 1597 transitions. [2020-11-12 09:40:22,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-12 09:40:22,659 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 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 41 [2020-11-12 09:40:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:22,664 INFO L225 Difference]: With dead ends: 1217 [2020-11-12 09:40:22,664 INFO L226 Difference]: Without dead ends: 961 [2020-11-12 09:40:22,665 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-11-12 09:40:22,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2020-11-12 09:40:22,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 851. [2020-11-12 09:40:22,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 787 states have (on average 1.4447268106734434) internal successors, (1137), 850 states have internal predecessors, (1137), 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) [2020-11-12 09:40:22,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 1137 transitions. [2020-11-12 09:40:22,688 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 1137 transitions. Word has length 41 [2020-11-12 09:40:22,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:22,689 INFO L481 AbstractCegarLoop]: Abstraction has 851 states and 1137 transitions. [2020-11-12 09:40:22,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 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) [2020-11-12 09:40:22,689 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 1137 transitions. [2020-11-12 09:40:22,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-12 09:40:22,690 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:22,691 INFO L494 BasicCegarLoop]: trace histogram [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] [2020-11-12 09:40:22,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:22,905 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:22,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:22,906 INFO L82 PathProgramCache]: Analyzing trace with hash 558735100, now seen corresponding path program 1 times [2020-11-12 09:40:22,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:22,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992447738] [2020-11-12 09:40:22,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:23,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992447738] [2020-11-12 09:40:23,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792959540] [2020-11-12 09:40:23,040 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 [2020-11-12 09:40:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:23,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 09:40:23,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:23,150 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:23,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:23,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:23,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-11-12 09:40:23,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637174449] [2020-11-12 09:40:23,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-12 09:40:23,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:23,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-12 09:40:23,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-11-12 09:40:23,192 INFO L87 Difference]: Start difference. First operand 851 states and 1137 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 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) [2020-11-12 09:40:23,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:23,394 INFO L93 Difference]: Finished difference Result 1544 states and 1905 transitions. [2020-11-12 09:40:23,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-12 09:40:23,394 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 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 46 [2020-11-12 09:40:23,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:23,400 INFO L225 Difference]: With dead ends: 1544 [2020-11-12 09:40:23,400 INFO L226 Difference]: Without dead ends: 1302 [2020-11-12 09:40:23,401 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2020-11-12 09:40:23,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2020-11-12 09:40:23,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 861. [2020-11-12 09:40:23,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 797 states have (on average 1.4416562107904642) internal successors, (1149), 860 states have internal predecessors, (1149), 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) [2020-11-12 09:40:23,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1149 transitions. [2020-11-12 09:40:23,424 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1149 transitions. Word has length 46 [2020-11-12 09:40:23,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:23,424 INFO L481 AbstractCegarLoop]: Abstraction has 861 states and 1149 transitions. [2020-11-12 09:40:23,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 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) [2020-11-12 09:40:23,424 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1149 transitions. [2020-11-12 09:40:23,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-12 09:40:23,425 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:23,425 INFO L494 BasicCegarLoop]: trace histogram [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] [2020-11-12 09:40:23,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:23,641 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:23,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:23,642 INFO L82 PathProgramCache]: Analyzing trace with hash 735627068, now seen corresponding path program 2 times [2020-11-12 09:40:23,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:23,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299071833] [2020-11-12 09:40:23,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:23,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299071833] [2020-11-12 09:40:23,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041510308] [2020-11-12 09:40:23,752 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:23,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:40:23,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:23,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 09:40:23,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:23,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:23,847 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:23,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:23,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-12 09:40:23,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208642303] [2020-11-12 09:40:23,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-12 09:40:23,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:23,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-12 09:40:23,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-11-12 09:40:23,855 INFO L87 Difference]: Start difference. First operand 861 states and 1149 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 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) [2020-11-12 09:40:24,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:24,073 INFO L93 Difference]: Finished difference Result 1240 states and 1561 transitions. [2020-11-12 09:40:24,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-12 09:40:24,076 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 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 46 [2020-11-12 09:40:24,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:24,081 INFO L225 Difference]: With dead ends: 1240 [2020-11-12 09:40:24,081 INFO L226 Difference]: Without dead ends: 1026 [2020-11-12 09:40:24,082 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:40:24,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2020-11-12 09:40:24,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 872. [2020-11-12 09:40:24,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 808 states have (on average 1.438118811881188) internal successors, (1162), 871 states have internal predecessors, (1162), 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) [2020-11-12 09:40:24,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1162 transitions. [2020-11-12 09:40:24,108 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1162 transitions. Word has length 46 [2020-11-12 09:40:24,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:24,108 INFO L481 AbstractCegarLoop]: Abstraction has 872 states and 1162 transitions. [2020-11-12 09:40:24,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 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) [2020-11-12 09:40:24,109 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1162 transitions. [2020-11-12 09:40:24,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-12 09:40:24,110 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:24,110 INFO L494 BasicCegarLoop]: trace histogram [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] [2020-11-12 09:40:24,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-12 09:40:24,326 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:24,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:24,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1108204526, now seen corresponding path program 3 times [2020-11-12 09:40:24,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:24,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899090126] [2020-11-12 09:40:24,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:24,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899090126] [2020-11-12 09:40:24,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378044981] [2020-11-12 09:40:24,426 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:24,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-12 09:40:24,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:24,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 09:40:24,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:24,518 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:24,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:24,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-12 09:40:24,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716200080] [2020-11-12 09:40:24,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-12 09:40:24,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:24,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-12 09:40:24,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-12 09:40:24,526 INFO L87 Difference]: Start difference. First operand 872 states and 1162 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 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) [2020-11-12 09:40:24,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:24,803 INFO L93 Difference]: Finished difference Result 1543 states and 1938 transitions. [2020-11-12 09:40:24,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-12 09:40:24,804 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 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 46 [2020-11-12 09:40:24,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:24,809 INFO L225 Difference]: With dead ends: 1543 [2020-11-12 09:40:24,809 INFO L226 Difference]: Without dead ends: 1007 [2020-11-12 09:40:24,811 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-11-12 09:40:24,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2020-11-12 09:40:24,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 872. [2020-11-12 09:40:24,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 808 states have (on average 1.431930693069307) internal successors, (1157), 871 states have internal predecessors, (1157), 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) [2020-11-12 09:40:24,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1157 transitions. [2020-11-12 09:40:24,832 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1157 transitions. Word has length 46 [2020-11-12 09:40:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:24,832 INFO L481 AbstractCegarLoop]: Abstraction has 872 states and 1157 transitions. [2020-11-12 09:40:24,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 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) [2020-11-12 09:40:24,833 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1157 transitions. [2020-11-12 09:40:24,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-12 09:40:24,834 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:24,834 INFO L494 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] [2020-11-12 09:40:25,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:25,049 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:25,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:25,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1319926319, now seen corresponding path program 4 times [2020-11-12 09:40:25,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:25,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677606365] [2020-11-12 09:40:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:25,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677606365] [2020-11-12 09:40:25,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724936949] [2020-11-12 09:40:25,204 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:25,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:40:25,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:25,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:40:25,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:25,305 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:25,345 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:25,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:25,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-11-12 09:40:25,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309434797] [2020-11-12 09:40:25,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-12 09:40:25,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:25,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-12 09:40:25,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-11-12 09:40:25,367 INFO L87 Difference]: Start difference. First operand 872 states and 1157 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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) [2020-11-12 09:40:25,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:25,668 INFO L93 Difference]: Finished difference Result 1261 states and 1587 transitions. [2020-11-12 09:40:25,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-12 09:40:25,670 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 51 [2020-11-12 09:40:25,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:25,675 INFO L225 Difference]: With dead ends: 1261 [2020-11-12 09:40:25,675 INFO L226 Difference]: Without dead ends: 1047 [2020-11-12 09:40:25,676 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2020-11-12 09:40:25,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2020-11-12 09:40:25,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 886. [2020-11-12 09:40:25,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 822 states have (on average 1.4355231143552312) internal successors, (1180), 885 states have internal predecessors, (1180), 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) [2020-11-12 09:40:25,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1180 transitions. [2020-11-12 09:40:25,709 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1180 transitions. Word has length 51 [2020-11-12 09:40:25,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:25,710 INFO L481 AbstractCegarLoop]: Abstraction has 886 states and 1180 transitions. [2020-11-12 09:40:25,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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) [2020-11-12 09:40:25,711 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1180 transitions. [2020-11-12 09:40:25,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-12 09:40:25,712 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:25,713 INFO L494 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] [2020-11-12 09:40:25,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:25,927 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:25,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:25,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1131209383, now seen corresponding path program 5 times [2020-11-12 09:40:25,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:25,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547716811] [2020-11-12 09:40:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:26,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547716811] [2020-11-12 09:40:26,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85658914] [2020-11-12 09:40:26,073 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:26,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:40:26,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:26,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-12 09:40:26,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:26,165 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:26,179 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:26,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:26,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-12 09:40:26,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028369930] [2020-11-12 09:40:26,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-12 09:40:26,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:26,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-12 09:40:26,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-11-12 09:40:26,190 INFO L87 Difference]: Start difference. First operand 886 states and 1180 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 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) [2020-11-12 09:40:26,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:26,534 INFO L93 Difference]: Finished difference Result 1566 states and 1966 transitions. [2020-11-12 09:40:26,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-12 09:40:26,540 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 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 51 [2020-11-12 09:40:26,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:26,546 INFO L225 Difference]: With dead ends: 1566 [2020-11-12 09:40:26,546 INFO L226 Difference]: Without dead ends: 1030 [2020-11-12 09:40:26,547 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2020-11-12 09:40:26,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2020-11-12 09:40:26,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 870. [2020-11-12 09:40:26,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 806 states have (on average 1.4317617866004964) internal successors, (1154), 869 states have internal predecessors, (1154), 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) [2020-11-12 09:40:26,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1154 transitions. [2020-11-12 09:40:26,577 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1154 transitions. Word has length 51 [2020-11-12 09:40:26,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:26,578 INFO L481 AbstractCegarLoop]: Abstraction has 870 states and 1154 transitions. [2020-11-12 09:40:26,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 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) [2020-11-12 09:40:26,578 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1154 transitions. [2020-11-12 09:40:26,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-12 09:40:26,579 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:26,579 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2020-11-12 09:40:26,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-12 09:40:26,793 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:26,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:26,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1873386279, now seen corresponding path program 6 times [2020-11-12 09:40:26,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:26,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578425552] [2020-11-12 09:40:26,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:26,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:26,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578425552] [2020-11-12 09:40:26,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570750114] [2020-11-12 09:40:26,934 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:26,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 09:40:26,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:26,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:40:27,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:27,046 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:27,084 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:27,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:27,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-11-12 09:40:27,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948440481] [2020-11-12 09:40:27,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 09:40:27,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:27,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 09:40:27,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-12 09:40:27,103 INFO L87 Difference]: Start difference. First operand 870 states and 1154 transitions. Second operand has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 14 states have internal predecessors, (78), 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) [2020-11-12 09:40:27,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:27,349 INFO L93 Difference]: Finished difference Result 1611 states and 1979 transitions. [2020-11-12 09:40:27,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-12 09:40:27,350 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 14 states have internal predecessors, (78), 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 56 [2020-11-12 09:40:27,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:27,356 INFO L225 Difference]: With dead ends: 1611 [2020-11-12 09:40:27,356 INFO L226 Difference]: Without dead ends: 1369 [2020-11-12 09:40:27,357 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2020-11-12 09:40:27,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2020-11-12 09:40:27,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 880. [2020-11-12 09:40:27,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 816 states have (on average 1.428921568627451) internal successors, (1166), 879 states have internal predecessors, (1166), 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) [2020-11-12 09:40:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1166 transitions. [2020-11-12 09:40:27,384 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1166 transitions. Word has length 56 [2020-11-12 09:40:27,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:27,384 INFO L481 AbstractCegarLoop]: Abstraction has 880 states and 1166 transitions. [2020-11-12 09:40:27,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 14 states have internal predecessors, (78), 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) [2020-11-12 09:40:27,384 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1166 transitions. [2020-11-12 09:40:27,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-12 09:40:27,385 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:27,386 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2020-11-12 09:40:27,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:27,600 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:27,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:27,601 INFO L82 PathProgramCache]: Analyzing trace with hash 797709159, now seen corresponding path program 7 times [2020-11-12 09:40:27,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:27,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109856026] [2020-11-12 09:40:27,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:27,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109856026] [2020-11-12 09:40:27,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948514114] [2020-11-12 09:40:27,732 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:27,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:40:27,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:27,816 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:27,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:27,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:27,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-12 09:40:27,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211802845] [2020-11-12 09:40:27,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-12 09:40:27,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:27,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-12 09:40:27,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-11-12 09:40:27,847 INFO L87 Difference]: Start difference. First operand 880 states and 1166 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 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) [2020-11-12 09:40:28,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:28,123 INFO L93 Difference]: Finished difference Result 1300 states and 1625 transitions. [2020-11-12 09:40:28,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-12 09:40:28,124 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 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 56 [2020-11-12 09:40:28,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:28,129 INFO L225 Difference]: With dead ends: 1300 [2020-11-12 09:40:28,129 INFO L226 Difference]: Without dead ends: 1058 [2020-11-12 09:40:28,131 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2020-11-12 09:40:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2020-11-12 09:40:28,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 903. [2020-11-12 09:40:28,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 839 states have (on average 1.4243146603098926) internal successors, (1195), 902 states have internal predecessors, (1195), 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) [2020-11-12 09:40:28,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1195 transitions. [2020-11-12 09:40:28,153 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1195 transitions. Word has length 56 [2020-11-12 09:40:28,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:28,153 INFO L481 AbstractCegarLoop]: Abstraction has 903 states and 1195 transitions. [2020-11-12 09:40:28,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 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) [2020-11-12 09:40:28,154 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1195 transitions. [2020-11-12 09:40:28,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-12 09:40:28,155 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:28,155 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2020-11-12 09:40:28,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-12 09:40:28,371 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:28,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:28,372 INFO L82 PathProgramCache]: Analyzing trace with hash 423479847, now seen corresponding path program 8 times [2020-11-12 09:40:28,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:28,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094766498] [2020-11-12 09:40:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:28,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094766498] [2020-11-12 09:40:28,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992946140] [2020-11-12 09:40:28,515 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:28,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:40:28,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:28,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 09:40:28,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:28,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:28,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:28,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:28,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-12 09:40:28,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76098205] [2020-11-12 09:40:28,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-12 09:40:28,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:28,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-12 09:40:28,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-12 09:40:28,641 INFO L87 Difference]: Start difference. First operand 903 states and 1195 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 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) [2020-11-12 09:40:28,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:28,975 INFO L93 Difference]: Finished difference Result 1314 states and 1649 transitions. [2020-11-12 09:40:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-12 09:40:28,975 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 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 56 [2020-11-12 09:40:28,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:28,980 INFO L225 Difference]: With dead ends: 1314 [2020-11-12 09:40:28,980 INFO L226 Difference]: Without dead ends: 1100 [2020-11-12 09:40:28,981 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2020-11-12 09:40:28,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2020-11-12 09:40:29,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 917. [2020-11-12 09:40:29,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 853 states have (on average 1.4279015240328252) internal successors, (1218), 916 states have internal predecessors, (1218), 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) [2020-11-12 09:40:29,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1218 transitions. [2020-11-12 09:40:29,003 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1218 transitions. Word has length 56 [2020-11-12 09:40:29,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:29,003 INFO L481 AbstractCegarLoop]: Abstraction has 917 states and 1218 transitions. [2020-11-12 09:40:29,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 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) [2020-11-12 09:40:29,004 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1218 transitions. [2020-11-12 09:40:29,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-12 09:40:29,005 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:29,005 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2020-11-12 09:40:29,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-12 09:40:29,220 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:29,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:29,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1420351747, now seen corresponding path program 9 times [2020-11-12 09:40:29,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:29,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474971498] [2020-11-12 09:40:29,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:29,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474971498] [2020-11-12 09:40:29,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211584986] [2020-11-12 09:40:29,405 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:29,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-12 09:40:29,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:29,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:40:29,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:29,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:29,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:29,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-11-12 09:40:29,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032026255] [2020-11-12 09:40:29,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-12 09:40:29,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:29,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-12 09:40:29,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-11-12 09:40:29,536 INFO L87 Difference]: Start difference. First operand 917 states and 1218 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 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) [2020-11-12 09:40:29,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:29,970 INFO L93 Difference]: Finished difference Result 1871 states and 2255 transitions. [2020-11-12 09:40:29,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-12 09:40:29,970 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 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 56 [2020-11-12 09:40:29,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:29,976 INFO L225 Difference]: With dead ends: 1871 [2020-11-12 09:40:29,976 INFO L226 Difference]: Without dead ends: 1137 [2020-11-12 09:40:29,976 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2020-11-12 09:40:29,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2020-11-12 09:40:29,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 927. [2020-11-12 09:40:29,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 863 states have (on average 1.4264194669756662) internal successors, (1231), 926 states have internal predecessors, (1231), 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) [2020-11-12 09:40:29,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1231 transitions. [2020-11-12 09:40:29,999 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1231 transitions. Word has length 56 [2020-11-12 09:40:29,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:29,999 INFO L481 AbstractCegarLoop]: Abstraction has 927 states and 1231 transitions. [2020-11-12 09:40:29,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 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) [2020-11-12 09:40:29,999 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1231 transitions. [2020-11-12 09:40:30,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-12 09:40:30,000 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:30,001 INFO L494 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] [2020-11-12 09:40:30,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-12 09:40:30,214 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:30,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:30,215 INFO L82 PathProgramCache]: Analyzing trace with hash 172841916, now seen corresponding path program 10 times [2020-11-12 09:40:30,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:30,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884919099] [2020-11-12 09:40:30,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:30,350 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:30,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884919099] [2020-11-12 09:40:30,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884665517] [2020-11-12 09:40:30,351 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:30,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:40:30,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:30,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:40:30,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:30,431 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:30,450 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:30,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:30,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-12 09:40:30,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819023698] [2020-11-12 09:40:30,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-12 09:40:30,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:30,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-12 09:40:30,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-11-12 09:40:30,461 INFO L87 Difference]: Start difference. First operand 927 states and 1231 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 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) [2020-11-12 09:40:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:30,781 INFO L93 Difference]: Finished difference Result 1341 states and 1681 transitions. [2020-11-12 09:40:30,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-12 09:40:30,781 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 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 61 [2020-11-12 09:40:30,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:30,789 INFO L225 Difference]: With dead ends: 1341 [2020-11-12 09:40:30,790 INFO L226 Difference]: Without dead ends: 1099 [2020-11-12 09:40:30,791 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2020-11-12 09:40:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2020-11-12 09:40:30,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 927. [2020-11-12 09:40:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 863 states have (on average 1.4264194669756662) internal successors, (1231), 926 states have internal predecessors, (1231), 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) [2020-11-12 09:40:30,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1231 transitions. [2020-11-12 09:40:30,813 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1231 transitions. Word has length 61 [2020-11-12 09:40:30,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:30,813 INFO L481 AbstractCegarLoop]: Abstraction has 927 states and 1231 transitions. [2020-11-12 09:40:30,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 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) [2020-11-12 09:40:30,814 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1231 transitions. [2020-11-12 09:40:30,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-12 09:40:30,815 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:30,815 INFO L494 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] [2020-11-12 09:40:31,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-12 09:40:31,031 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:31,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:31,032 INFO L82 PathProgramCache]: Analyzing trace with hash -201387396, now seen corresponding path program 11 times [2020-11-12 09:40:31,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:31,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052718443] [2020-11-12 09:40:31,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:31,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052718443] [2020-11-12 09:40:31,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396639990] [2020-11-12 09:40:31,210 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:31,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-12 09:40:31,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:31,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-12 09:40:31,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:31,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:31,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:31,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:31,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-12 09:40:31,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800845734] [2020-11-12 09:40:31,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-12 09:40:31,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:31,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-12 09:40:31,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-11-12 09:40:31,353 INFO L87 Difference]: Start difference. First operand 927 states and 1231 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 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) [2020-11-12 09:40:31,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:31,803 INFO L93 Difference]: Finished difference Result 1335 states and 1675 transitions. [2020-11-12 09:40:31,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-12 09:40:31,804 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 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 61 [2020-11-12 09:40:31,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:31,808 INFO L225 Difference]: With dead ends: 1335 [2020-11-12 09:40:31,809 INFO L226 Difference]: Without dead ends: 1121 [2020-11-12 09:40:31,809 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2020-11-12 09:40:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2020-11-12 09:40:31,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 931. [2020-11-12 09:40:31,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 867 states have (on average 1.42560553633218) internal successors, (1236), 930 states have internal predecessors, (1236), 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) [2020-11-12 09:40:31,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1236 transitions. [2020-11-12 09:40:31,831 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1236 transitions. Word has length 61 [2020-11-12 09:40:31,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:31,831 INFO L481 AbstractCegarLoop]: Abstraction has 931 states and 1236 transitions. [2020-11-12 09:40:31,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 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) [2020-11-12 09:40:31,832 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1236 transitions. [2020-11-12 09:40:31,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-12 09:40:31,833 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:31,833 INFO L494 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] [2020-11-12 09:40:32,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:32,047 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:32,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:32,048 INFO L82 PathProgramCache]: Analyzing trace with hash -2045218990, now seen corresponding path program 12 times [2020-11-12 09:40:32,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:32,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379709840] [2020-11-12 09:40:32,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:32,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:32,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379709840] [2020-11-12 09:40:32,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291432023] [2020-11-12 09:40:32,183 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:32,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-12 09:40:32,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:32,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:40:32,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:32,290 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:32,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:32,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-11-12 09:40:32,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926461520] [2020-11-12 09:40:32,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-12 09:40:32,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:32,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-12 09:40:32,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-11-12 09:40:32,307 INFO L87 Difference]: Start difference. First operand 931 states and 1236 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 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) [2020-11-12 09:40:32,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:32,791 INFO L93 Difference]: Finished difference Result 1867 states and 2236 transitions. [2020-11-12 09:40:32,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-12 09:40:32,791 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 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 61 [2020-11-12 09:40:32,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:32,796 INFO L225 Difference]: With dead ends: 1867 [2020-11-12 09:40:32,796 INFO L226 Difference]: Without dead ends: 1133 [2020-11-12 09:40:32,796 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=288, Invalid=902, Unknown=0, NotChecked=0, Total=1190 [2020-11-12 09:40:32,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2020-11-12 09:40:32,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 901. [2020-11-12 09:40:32,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 837 states have (on average 1.4241338112305855) internal successors, (1192), 900 states have internal predecessors, (1192), 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) [2020-11-12 09:40:32,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1192 transitions. [2020-11-12 09:40:32,819 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1192 transitions. Word has length 61 [2020-11-12 09:40:32,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:32,819 INFO L481 AbstractCegarLoop]: Abstraction has 901 states and 1192 transitions. [2020-11-12 09:40:32,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 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) [2020-11-12 09:40:32,819 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1192 transitions. [2020-11-12 09:40:32,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-12 09:40:32,820 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:32,821 INFO L494 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] [2020-11-12 09:40:33,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:33,035 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:33,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:33,036 INFO L82 PathProgramCache]: Analyzing trace with hash -358310510, now seen corresponding path program 13 times [2020-11-12 09:40:33,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:33,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687658946] [2020-11-12 09:40:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:33,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687658946] [2020-11-12 09:40:33,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736228941] [2020-11-12 09:40:33,217 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:33,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:40:33,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:33,307 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:33,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:33,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:33,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2020-11-12 09:40:33,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322510390] [2020-11-12 09:40:33,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-12 09:40:33,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:33,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-12 09:40:33,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-11-12 09:40:33,367 INFO L87 Difference]: Start difference. First operand 901 states and 1192 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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) [2020-11-12 09:40:33,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:33,687 INFO L93 Difference]: Finished difference Result 1656 states and 2033 transitions. [2020-11-12 09:40:33,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-12 09:40:33,688 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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 66 [2020-11-12 09:40:33,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:33,693 INFO L225 Difference]: With dead ends: 1656 [2020-11-12 09:40:33,694 INFO L226 Difference]: Without dead ends: 1414 [2020-11-12 09:40:33,694 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2020-11-12 09:40:33,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2020-11-12 09:40:33,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 911. [2020-11-12 09:40:33,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 847 states have (on average 1.421487603305785) internal successors, (1204), 910 states have internal predecessors, (1204), 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) [2020-11-12 09:40:33,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1204 transitions. [2020-11-12 09:40:33,716 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1204 transitions. Word has length 66 [2020-11-12 09:40:33,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:33,716 INFO L481 AbstractCegarLoop]: Abstraction has 911 states and 1204 transitions. [2020-11-12 09:40:33,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 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) [2020-11-12 09:40:33,717 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1204 transitions. [2020-11-12 09:40:33,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-12 09:40:33,720 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:33,720 INFO L494 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] [2020-11-12 09:40:33,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:33,934 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:33,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:33,935 INFO L82 PathProgramCache]: Analyzing trace with hash 620611026, now seen corresponding path program 14 times [2020-11-12 09:40:33,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:33,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362614150] [2020-11-12 09:40:33,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:34,115 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:34,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362614150] [2020-11-12 09:40:34,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516056449] [2020-11-12 09:40:34,116 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:34,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:40:34,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:34,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:40:34,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:34,204 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:34,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:34,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:34,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-12 09:40:34,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586007566] [2020-11-12 09:40:34,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-12 09:40:34,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:34,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-12 09:40:34,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-11-12 09:40:34,256 INFO L87 Difference]: Start difference. First operand 911 states and 1204 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 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) [2020-11-12 09:40:34,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:34,560 INFO L93 Difference]: Finished difference Result 1373 states and 1711 transitions. [2020-11-12 09:40:34,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-12 09:40:34,560 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 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 66 [2020-11-12 09:40:34,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:34,565 INFO L225 Difference]: With dead ends: 1373 [2020-11-12 09:40:34,565 INFO L226 Difference]: Without dead ends: 1131 [2020-11-12 09:40:34,567 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2020-11-12 09:40:34,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2020-11-12 09:40:34,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 934. [2020-11-12 09:40:34,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 870 states have (on average 1.4172413793103449) internal successors, (1233), 933 states have internal predecessors, (1233), 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) [2020-11-12 09:40:34,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1233 transitions. [2020-11-12 09:40:34,587 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1233 transitions. Word has length 66 [2020-11-12 09:40:34,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:34,587 INFO L481 AbstractCegarLoop]: Abstraction has 934 states and 1233 transitions. [2020-11-12 09:40:34,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 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) [2020-11-12 09:40:34,587 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1233 transitions. [2020-11-12 09:40:34,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-12 09:40:34,588 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:34,589 INFO L494 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] [2020-11-12 09:40:34,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-12 09:40:34,802 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:34,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:34,803 INFO L82 PathProgramCache]: Analyzing trace with hash -637096814, now seen corresponding path program 15 times [2020-11-12 09:40:34,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:34,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635375595] [2020-11-12 09:40:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:34,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635375595] [2020-11-12 09:40:34,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078965469] [2020-11-12 09:40:34,951 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:35,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 09:40:35,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:35,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:40:35,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:35,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:35,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:35,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:35,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-12 09:40:35,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980168735] [2020-11-12 09:40:35,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-12 09:40:35,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:35,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-12 09:40:35,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-11-12 09:40:35,079 INFO L87 Difference]: Start difference. First operand 934 states and 1233 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 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) [2020-11-12 09:40:35,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:35,475 INFO L93 Difference]: Finished difference Result 1374 states and 1713 transitions. [2020-11-12 09:40:35,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-12 09:40:35,475 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 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 66 [2020-11-12 09:40:35,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:35,479 INFO L225 Difference]: With dead ends: 1374 [2020-11-12 09:40:35,479 INFO L226 Difference]: Without dead ends: 1132 [2020-11-12 09:40:35,480 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2020-11-12 09:40:35,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2020-11-12 09:40:35,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 948. [2020-11-12 09:40:35,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 884 states have (on average 1.415158371040724) internal successors, (1251), 947 states have internal predecessors, (1251), 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) [2020-11-12 09:40:35,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1251 transitions. [2020-11-12 09:40:35,499 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1251 transitions. Word has length 66 [2020-11-12 09:40:35,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:35,499 INFO L481 AbstractCegarLoop]: Abstraction has 948 states and 1251 transitions. [2020-11-12 09:40:35,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 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) [2020-11-12 09:40:35,499 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1251 transitions. [2020-11-12 09:40:35,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-12 09:40:35,501 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:35,501 INFO L494 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] [2020-11-12 09:40:35,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-12 09:40:35,715 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:35,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:35,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1011326126, now seen corresponding path program 16 times [2020-11-12 09:40:35,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:35,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915758026] [2020-11-12 09:40:35,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:35,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915758026] [2020-11-12 09:40:35,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005590902] [2020-11-12 09:40:35,863 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:35,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 09:40:35,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:35,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-12 09:40:35,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:35,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:35,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:35,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:35,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-12 09:40:35,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499212782] [2020-11-12 09:40:35,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-12 09:40:35,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:35,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-12 09:40:35,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-11-12 09:40:35,981 INFO L87 Difference]: Start difference. First operand 948 states and 1251 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 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) [2020-11-12 09:40:36,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:36,479 INFO L93 Difference]: Finished difference Result 1763 states and 2135 transitions. [2020-11-12 09:40:36,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-12 09:40:36,480 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 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 66 [2020-11-12 09:40:36,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:36,492 INFO L225 Difference]: With dead ends: 1763 [2020-11-12 09:40:36,493 INFO L226 Difference]: Without dead ends: 1212 [2020-11-12 09:40:36,493 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2020-11-12 09:40:36,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2020-11-12 09:40:36,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 962. [2020-11-12 09:40:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 898 states have (on average 1.418708240534521) internal successors, (1274), 961 states have internal predecessors, (1274), 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) [2020-11-12 09:40:36,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1274 transitions. [2020-11-12 09:40:36,518 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1274 transitions. Word has length 66 [2020-11-12 09:40:36,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:36,519 INFO L481 AbstractCegarLoop]: Abstraction has 962 states and 1274 transitions. [2020-11-12 09:40:36,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 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) [2020-11-12 09:40:36,519 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1274 transitions. [2020-11-12 09:40:36,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-12 09:40:36,520 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:36,520 INFO L494 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] [2020-11-12 09:40:36,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-12 09:40:36,734 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:36,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:36,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1439809576, now seen corresponding path program 17 times [2020-11-12 09:40:36,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:36,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960368192] [2020-11-12 09:40:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:36,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960368192] [2020-11-12 09:40:36,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966535561] [2020-11-12 09:40:36,878 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:36,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-12 09:40:36,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:36,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 09:40:36,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:36,959 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:36,979 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:36,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:36,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-12 09:40:36,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382484562] [2020-11-12 09:40:36,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-12 09:40:36,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:36,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-12 09:40:36,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-11-12 09:40:36,991 INFO L87 Difference]: Start difference. First operand 962 states and 1274 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 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) [2020-11-12 09:40:37,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:37,566 INFO L93 Difference]: Finished difference Result 1889 states and 2269 transitions. [2020-11-12 09:40:37,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-12 09:40:37,566 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 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 66 [2020-11-12 09:40:37,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:37,570 INFO L225 Difference]: With dead ends: 1889 [2020-11-12 09:40:37,570 INFO L226 Difference]: Without dead ends: 1155 [2020-11-12 09:40:37,570 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2020-11-12 09:40:37,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2020-11-12 09:40:37,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 934. [2020-11-12 09:40:37,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 870 states have (on average 1.4172413793103449) internal successors, (1233), 933 states have internal predecessors, (1233), 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) [2020-11-12 09:40:37,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1233 transitions. [2020-11-12 09:40:37,589 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1233 transitions. Word has length 66 [2020-11-12 09:40:37,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:37,589 INFO L481 AbstractCegarLoop]: Abstraction has 934 states and 1233 transitions. [2020-11-12 09:40:37,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 15 states have internal predecessors, (70), 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) [2020-11-12 09:40:37,589 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1233 transitions. [2020-11-12 09:40:37,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-12 09:40:37,591 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:37,591 INFO L494 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] [2020-11-12 09:40:37,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-12 09:40:37,806 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:37,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:37,807 INFO L82 PathProgramCache]: Analyzing trace with hash 78931943, now seen corresponding path program 18 times [2020-11-12 09:40:37,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:37,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989859077] [2020-11-12 09:40:37,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:37,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989859077] [2020-11-12 09:40:37,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986085366] [2020-11-12 09:40:37,985 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:38,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-12 09:40:38,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:38,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:40:38,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:38,066 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:38,081 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:38,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:38,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-12 09:40:38,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766274829] [2020-11-12 09:40:38,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-12 09:40:38,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:38,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-12 09:40:38,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-12 09:40:38,094 INFO L87 Difference]: Start difference. First operand 934 states and 1233 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 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) [2020-11-12 09:40:38,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:38,465 INFO L93 Difference]: Finished difference Result 1404 states and 1749 transitions. [2020-11-12 09:40:38,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-12 09:40:38,466 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 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 71 [2020-11-12 09:40:38,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:38,468 INFO L225 Difference]: With dead ends: 1404 [2020-11-12 09:40:38,468 INFO L226 Difference]: Without dead ends: 1162 [2020-11-12 09:40:38,469 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2020-11-12 09:40:38,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-11-12 09:40:38,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 948. [2020-11-12 09:40:38,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 884 states have (on average 1.415158371040724) internal successors, (1251), 947 states have internal predecessors, (1251), 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) [2020-11-12 09:40:38,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1251 transitions. [2020-11-12 09:40:38,487 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1251 transitions. Word has length 71 [2020-11-12 09:40:38,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:38,488 INFO L481 AbstractCegarLoop]: Abstraction has 948 states and 1251 transitions. [2020-11-12 09:40:38,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 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) [2020-11-12 09:40:38,488 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1251 transitions. [2020-11-12 09:40:38,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-12 09:40:38,489 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:38,489 INFO L494 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] [2020-11-12 09:40:38,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-12 09:40:38,705 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:38,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:38,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1178775897, now seen corresponding path program 19 times [2020-11-12 09:40:38,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:38,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678076637] [2020-11-12 09:40:38,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:38,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678076637] [2020-11-12 09:40:38,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062548213] [2020-11-12 09:40:38,850 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:38,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:40:38,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:38,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:38,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:38,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:38,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-12 09:40:38,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986286902] [2020-11-12 09:40:38,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-12 09:40:38,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:38,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-12 09:40:38,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-11-12 09:40:38,964 INFO L87 Difference]: Start difference. First operand 948 states and 1251 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 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) [2020-11-12 09:40:39,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:39,421 INFO L93 Difference]: Finished difference Result 1405 states and 1751 transitions. [2020-11-12 09:40:39,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-12 09:40:39,421 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 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 71 [2020-11-12 09:40:39,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:39,424 INFO L225 Difference]: With dead ends: 1405 [2020-11-12 09:40:39,424 INFO L226 Difference]: Without dead ends: 1163 [2020-11-12 09:40:39,424 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2020-11-12 09:40:39,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2020-11-12 09:40:39,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 962. [2020-11-12 09:40:39,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 898 states have (on average 1.413140311804009) internal successors, (1269), 961 states have internal predecessors, (1269), 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) [2020-11-12 09:40:39,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1269 transitions. [2020-11-12 09:40:39,446 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1269 transitions. Word has length 71 [2020-11-12 09:40:39,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:39,446 INFO L481 AbstractCegarLoop]: Abstraction has 962 states and 1269 transitions. [2020-11-12 09:40:39,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 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) [2020-11-12 09:40:39,446 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1269 transitions. [2020-11-12 09:40:39,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-12 09:40:39,448 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:39,448 INFO L494 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] [2020-11-12 09:40:39,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:39,662 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:39,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:39,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1553005209, now seen corresponding path program 20 times [2020-11-12 09:40:39,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:39,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528163786] [2020-11-12 09:40:39,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:39,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528163786] [2020-11-12 09:40:39,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627843843] [2020-11-12 09:40:39,807 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:39,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 09:40:39,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:39,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-12 09:40:39,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:39,902 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-12 09:40:39,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:39,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:39,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-12 09:40:39,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455052904] [2020-11-12 09:40:39,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-12 09:40:39,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:39,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-12 09:40:39,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-12 09:40:39,926 INFO L87 Difference]: Start difference. First operand 962 states and 1269 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 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) [2020-11-12 09:40:40,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:40,490 INFO L93 Difference]: Finished difference Result 1793 states and 2171 transitions. [2020-11-12 09:40:40,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-12 09:40:40,491 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 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 71 [2020-11-12 09:40:40,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:40,493 INFO L225 Difference]: With dead ends: 1793 [2020-11-12 09:40:40,493 INFO L226 Difference]: Without dead ends: 1242 [2020-11-12 09:40:40,493 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2020-11-12 09:40:40,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2020-11-12 09:40:40,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 976. [2020-11-12 09:40:40,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 912 states have (on average 1.4166666666666667) internal successors, (1292), 975 states have internal predecessors, (1292), 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) [2020-11-12 09:40:40,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1292 transitions. [2020-11-12 09:40:40,508 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1292 transitions. Word has length 71 [2020-11-12 09:40:40,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:40,508 INFO L481 AbstractCegarLoop]: Abstraction has 976 states and 1292 transitions. [2020-11-12 09:40:40,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 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) [2020-11-12 09:40:40,509 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1292 transitions. [2020-11-12 09:40:40,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-12 09:40:40,510 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:40,510 INFO L494 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] [2020-11-12 09:40:40,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-12 09:40:40,724 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:40,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:40,725 INFO L82 PathProgramCache]: Analyzing trace with hash 898130493, now seen corresponding path program 21 times [2020-11-12 09:40:40,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:40,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659247945] [2020-11-12 09:40:40,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 09:40:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:40,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659247945] [2020-11-12 09:40:40,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134348642] [2020-11-12 09:40:40,876 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 09:40:40,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 09:40:40,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 09:40:40,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-12 09:40:40,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 09:40:40,970 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 09:40:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 09:40:40,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 09:40:40,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-12 09:40:40,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951239642] [2020-11-12 09:40:40,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-12 09:40:40,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 09:40:40,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-12 09:40:40,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-11-12 09:40:40,981 INFO L87 Difference]: Start difference. First operand 976 states and 1292 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) [2020-11-12 09:40:41,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 09:40:41,542 INFO L93 Difference]: Finished difference Result 1714 states and 2142 transitions. [2020-11-12 09:40:41,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-12 09:40:41,543 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 71 [2020-11-12 09:40:41,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 09:40:41,545 INFO L225 Difference]: With dead ends: 1714 [2020-11-12 09:40:41,545 INFO L226 Difference]: Without dead ends: 1178 [2020-11-12 09:40:41,548 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=347, Invalid=985, Unknown=0, NotChecked=0, Total=1332 [2020-11-12 09:40:41,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2020-11-12 09:40:41,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 986. [2020-11-12 09:40:41,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 922 states have (on average 1.4154013015184381) internal successors, (1305), 985 states have internal predecessors, (1305), 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) [2020-11-12 09:40:41,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1305 transitions. [2020-11-12 09:40:41,576 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1305 transitions. Word has length 71 [2020-11-12 09:40:41,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 09:40:41,576 INFO L481 AbstractCegarLoop]: Abstraction has 986 states and 1305 transitions. [2020-11-12 09:40:41,576 INFO L482 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) [2020-11-12 09:40:41,576 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1305 transitions. [2020-11-12 09:40:41,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-12 09:40:41,578 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 09:40:41,578 INFO L494 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] [2020-11-12 09:40:41,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-12 09:40:41,793 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 09:40:41,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 09:40:41,794 INFO L82 PathProgramCache]: Analyzing trace with hash 752604733, now seen corresponding path program 22 times [2020-11-12 09:40:41,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 09:40:41,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547322212] [2020-11-12 09:40:41,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 09:40:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-12 09:40:41,808 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-12 09:40:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-12 09:40:41,821 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-12 09:40:41,851 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-12 09:40:41,851 INFO L595 BasicCegarLoop]: Counterexample might be feasible [2020-11-12 09:40:41,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-12 09:40:41,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 09:40:41 BasicIcfg [2020-11-12 09:40:41,943 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-12 09:40:41,945 INFO L168 Benchmark]: Toolchain (without parser) took 25404.55 ms. Allocated memory was 302.0 MB in the beginning and 507.5 MB in the end (delta: 205.5 MB). Free memory was 276.3 MB in the beginning and 382.1 MB in the end (delta: -105.8 MB). Peak memory consumption was 100.7 MB. Max. memory is 16.0 GB. [2020-11-12 09:40:41,945 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 302.0 MB. Free memory is still 272.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2020-11-12 09:40:41,946 INFO L168 Benchmark]: CACSL2BoogieTranslator took 729.10 ms. Allocated memory is still 302.0 MB. Free memory was 275.6 MB in the beginning and 274.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 24.6 MB. Max. memory is 16.0 GB. [2020-11-12 09:40:41,946 INFO L168 Benchmark]: Boogie Procedure Inliner took 79.95 ms. Allocated memory is still 302.0 MB. Free memory was 274.4 MB in the beginning and 272.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-12 09:40:41,947 INFO L168 Benchmark]: Boogie Preprocessor took 27.82 ms. Allocated memory is still 302.0 MB. Free memory was 272.4 MB in the beginning and 271.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-12 09:40:41,947 INFO L168 Benchmark]: RCFGBuilder took 499.50 ms. Allocated memory is still 302.0 MB. Free memory was 271.1 MB in the beginning and 250.9 MB in the end (delta: 20.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. [2020-11-12 09:40:41,947 INFO L168 Benchmark]: TraceAbstraction took 24051.38 ms. Allocated memory was 302.0 MB in the beginning and 507.5 MB in the end (delta: 205.5 MB). Free memory was 250.6 MB in the beginning and 382.1 MB in the end (delta: -131.5 MB). Peak memory consumption was 76.1 MB. Max. memory is 16.0 GB. [2020-11-12 09:40:41,949 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 302.0 MB. Free memory is still 272.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 729.10 ms. Allocated memory is still 302.0 MB. Free memory was 275.6 MB in the beginning and 274.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 24.6 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 79.95 ms. Allocated memory is still 302.0 MB. Free memory was 274.4 MB in the beginning and 272.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 27.82 ms. Allocated memory is still 302.0 MB. Free memory was 272.4 MB in the beginning and 271.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 499.50 ms. Allocated memory is still 302.0 MB. Free memory was 271.1 MB in the beginning and 250.9 MB in the end (delta: 20.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 24051.38 ms. Allocated memory was 302.0 MB in the beginning and 507.5 MB in the end (delta: 205.5 MB). Free memory was 250.6 MB in the beginning and 382.1 MB in the end (delta: -131.5 MB). Peak memory consumption was 76.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 685]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L686] 0 int i = 3, j = 6; VAL [i=3, j=6] [L704] 0 pthread_t id1, id2; VAL [i=3, j=6] [L705] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L688] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L688] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L706] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L708] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L688] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=0, k=1] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=0, k=2] [L688] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=0, k=2] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L696] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=1] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=1] [L688] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=1] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L696] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=2, k=3] [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=2, k=4] [L688] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=2, k=4] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L696] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L690] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=3] [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L696] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L698] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L711] 0 int condJ = j >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L713] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L685] COND FALSE 0 !(0) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L685] 0 __assert_fail ("0", "triangular-2.c", 8, __extension__ __PRETTY_FUNCTION__) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23.8s, OverallIterations: 30, TraceHistogramMax: 5, AutomataDifference: 9.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.4s, HoareTripleCheckerStatistics: 1934 SDtfs, 5401 SDslu, 13498 SDs, 0 SdLazy, 2900 SolverSat, 894 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2044 GetRequests, 1365 SyntacticMatches, 17 SemanticMatches, 662 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3420 ImplicationChecksByTransitivity, 9.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6412occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 29 MinimizatonAttempts, 6414 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 3012 NumberOfCodeBlocks, 3012 NumberOfCodeBlocksAsserted, 84 NumberOfCheckSat, 2883 ConstructedInterpolants, 0 QuantifiedInterpolants, 627269 SizeOfPredicates, 230 NumberOfNonLiveVariables, 3328 ConjunctsInSsa, 310 ConjunctsInUnsatCore, 53 InterpolantComputations, 5 PerfectInterpolantSequences, 40/1296 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...