/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 18:25:51,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 18:25:51,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 18:25:51,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-13 18:25:51,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-13 18:25:51,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-13 18:25:51,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-13 18:25:51,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-13 18:25:51,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-13 18:25:51,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-13 18:25:51,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-13 18:25:51,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-13 18:25:51,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 18:25:51,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 18:25:51,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 18:25:51,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 18:25:51,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 18:25:51,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 18:25:51,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 18:25:51,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 18:25:51,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 18:25:51,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 18:25:51,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 18:25:51,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 18:25:51,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-13 18:25:51,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-13 18:25:51,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-13 18:25:51,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-13 18:25:51,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-13 18:25:51,091 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-13 18:25:51,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-13 18:25:51,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-13 18:25:51,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-13 18:25:51,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-13 18:25:51,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-13 18:25:51,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-13 18:25:51,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-13 18:25:51,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-13 18:25:51,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 18:25:51,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 18:25:51,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 18:25:51,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 18:25:51,126 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 18:25:51,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 18:25:51,127 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 18:25:51,127 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 18:25:51,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 18:25:51,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 18:25:51,129 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 18:25:51,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 18:25:51,129 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 18:25:51,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 18:25:51,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 18:25:51,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 18:25:51,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 18:25:51,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 18:25:51,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 18:25:51,131 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 18:25:51,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 18:25:51,131 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 18:25:51,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 18:25:51,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 18:25:51,131 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 18:25:51,131 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 18:25:51,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 18:25:51,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 18:25:51,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 18:25:51,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 18:25:51,139 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 18:25:51,140 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 18:25:51,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 18:25:51,140 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 18:25:51,140 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 18:25:51,140 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 18:25:51,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 18:25:51,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 18:25:51,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 18:25:51,407 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-13 18:25:51,409 INFO L275 PluginConnector]: CDTParser initialized [2021-07-13 18:25:51,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2021-07-13 18:25:51,456 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b9862563/ea9b780191ce487fa6fa6e5dd018105c/FLAG70f83253a [2021-07-13 18:25:51,957 INFO L306 CDTParser]: Found 1 translation units. [2021-07-13 18:25:51,957 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2021-07-13 18:25:51,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b9862563/ea9b780191ce487fa6fa6e5dd018105c/FLAG70f83253a [2021-07-13 18:25:52,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b9862563/ea9b780191ce487fa6fa6e5dd018105c [2021-07-13 18:25:52,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 18:25:52,446 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-13 18:25:52,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-13 18:25:52,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-13 18:25:52,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-13 18:25:52,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:25:52" (1/1) ... [2021-07-13 18:25:52,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@456e96b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:52, skipping insertion in model container [2021-07-13 18:25:52,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:25:52" (1/1) ... [2021-07-13 18:25:52,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-13 18:25:52,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-13 18:25:52,704 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i[30952,30965] [2021-07-13 18:25:52,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 18:25:52,715 INFO L203 MainTranslator]: Completed pre-run [2021-07-13 18:25:52,792 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i[30952,30965] [2021-07-13 18:25:52,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 18:25:52,832 INFO L208 MainTranslator]: Completed translation [2021-07-13 18:25:52,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:52 WrapperNode [2021-07-13 18:25:52,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-13 18:25:52,834 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 18:25:52,834 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 18:25:52,834 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 18:25:52,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:52" (1/1) ... [2021-07-13 18:25:52,861 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:52" (1/1) ... [2021-07-13 18:25:52,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 18:25:52,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 18:25:52,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 18:25:52,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 18:25:52,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:52" (1/1) ... [2021-07-13 18:25:52,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:52" (1/1) ... [2021-07-13 18:25:52,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:52" (1/1) ... [2021-07-13 18:25:52,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:52" (1/1) ... [2021-07-13 18:25:52,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:52" (1/1) ... [2021-07-13 18:25:52,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:52" (1/1) ... [2021-07-13 18:25:52,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:52" (1/1) ... [2021-07-13 18:25:52,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 18:25:52,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 18:25:52,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 18:25:52,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 18:25:52,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 18:25:53,014 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-07-13 18:25:53,014 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-07-13 18:25:53,014 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-07-13 18:25:53,015 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-07-13 18:25:53,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-13 18:25:53,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-07-13 18:25:53,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-13 18:25:53,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-13 18:25:53,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-13 18:25:53,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-07-13 18:25:53,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 18:25:53,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 18:25:53,017 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 18:25:53,378 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 18:25:53,378 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-07-13 18:25:53,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:25:53 BoogieIcfgContainer [2021-07-13 18:25:53,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 18:25:53,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 18:25:53,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 18:25:53,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 18:25:53,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:25:52" (1/3) ... [2021-07-13 18:25:53,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0a581c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:25:53, skipping insertion in model container [2021-07-13 18:25:53,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:52" (2/3) ... [2021-07-13 18:25:53,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0a581c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:25:53, skipping insertion in model container [2021-07-13 18:25:53,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:25:53" (3/3) ... [2021-07-13 18:25:53,384 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2021-07-13 18:25:53,392 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 18:25:53,392 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 18:25:53,393 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 18:25:53,393 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 18:25:53,420 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,421 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,421 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,421 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,421 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,421 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,421 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,421 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,422 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,422 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,423 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,423 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,423 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,423 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,423 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,423 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,423 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,423 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,424 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,424 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,424 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,424 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,424 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,425 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,425 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,425 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,425 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,425 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,425 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,426 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,426 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,426 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,426 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,427 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,427 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,427 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,427 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,427 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,427 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,427 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,427 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,427 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,427 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,428 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,428 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,428 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,428 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,428 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,428 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,428 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,429 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,429 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,429 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,429 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,430 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,430 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,432 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,432 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,432 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,432 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,432 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,432 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,439 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,439 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,439 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,439 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,440 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,440 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:25:53,441 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-07-13 18:25:53,455 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 18:25:53,467 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 18:25:53,467 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 18:25:53,467 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 18:25:53,467 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 18:25:53,467 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 18:25:53,468 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 18:25:53,468 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 18:25:53,468 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 18:25:53,477 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-07-13 18:25:53,528 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 780 states, 779 states have (on average 2.934531450577664) internal successors, (2286), 779 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:53,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 780 states, 779 states have (on average 2.934531450577664) internal successors, (2286), 779 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:53,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 18:25:53,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:53,539 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:25:53,539 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:53,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:53,543 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-07-13 18:25:53,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:53,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84868186] [2021-07-13 18:25:53,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:53,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:25:53,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:53,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84868186] [2021-07-13 18:25:53,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84868186] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:25:53,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:25:53,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 18:25:53,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818033607] [2021-07-13 18:25:53,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 18:25:53,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:53,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 18:25:53,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 18:25:53,789 INFO L87 Difference]: Start difference. First operand has 780 states, 779 states have (on average 2.934531450577664) internal successors, (2286), 779 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:53,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:53,910 INFO L93 Difference]: Finished difference Result 1582 states and 4288 transitions. [2021-07-13 18:25:53,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 18:25:53,912 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 18:25:53,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:53,930 INFO L225 Difference]: With dead ends: 1582 [2021-07-13 18:25:53,930 INFO L226 Difference]: Without dead ends: 1248 [2021-07-13 18:25:53,931 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 18:25:53,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-13 18:25:54,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 800. [2021-07-13 18:25:54,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.728410513141427) internal successors, (2180), 799 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:54,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-07-13 18:25:54,011 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 32 [2021-07-13 18:25:54,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:54,011 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-07-13 18:25:54,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:54,011 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-07-13 18:25:54,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 18:25:54,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:54,017 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:25:54,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 18:25:54,018 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:54,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:54,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-07-13 18:25:54,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:54,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524558135] [2021-07-13 18:25:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:25:54,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:54,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524558135] [2021-07-13 18:25:54,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524558135] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:25:54,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:25:54,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 18:25:54,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958373590] [2021-07-13 18:25:54,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 18:25:54,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:54,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 18:25:54,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 18:25:54,116 INFO L87 Difference]: Start difference. First operand 800 states and 2180 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:54,279 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2021-07-13 18:25:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:54,344 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-07-13 18:25:54,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 18:25:54,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 18:25:54,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:54,348 INFO L225 Difference]: With dead ends: 1302 [2021-07-13 18:25:54,348 INFO L226 Difference]: Without dead ends: 920 [2021-07-13 18:25:54,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-13 18:25:54,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-07-13 18:25:54,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-07-13 18:25:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.6882966396292005) internal successors, (2320), 863 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:54,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-07-13 18:25:54,380 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-07-13 18:25:54,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:54,380 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-07-13 18:25:54,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:54,380 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-07-13 18:25:54,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 18:25:54,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:54,382 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:25:54,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 18:25:54,382 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:54,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:54,383 INFO L82 PathProgramCache]: Analyzing trace with hash -262940086, now seen corresponding path program 1 times [2021-07-13 18:25:54,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:54,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605115933] [2021-07-13 18:25:54,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:25:54,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:54,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605115933] [2021-07-13 18:25:54,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605115933] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:25:54,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:25:54,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 18:25:54,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455242844] [2021-07-13 18:25:54,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 18:25:54,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:54,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 18:25:54,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 18:25:54,459 INFO L87 Difference]: Start difference. First operand 864 states and 2320 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:54,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:54,604 INFO L93 Difference]: Finished difference Result 1304 states and 3456 transitions. [2021-07-13 18:25:54,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 18:25:54,605 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 18:25:54,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:54,609 INFO L225 Difference]: With dead ends: 1304 [2021-07-13 18:25:54,609 INFO L226 Difference]: Without dead ends: 1044 [2021-07-13 18:25:54,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:25:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-07-13 18:25:54,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 876. [2021-07-13 18:25:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.7062857142857144) internal successors, (2368), 875 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:54,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-07-13 18:25:54,627 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-07-13 18:25:54,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:54,628 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-07-13 18:25:54,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:54,628 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-07-13 18:25:54,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-07-13 18:25:54,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:54,630 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:25:54,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 18:25:54,631 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:54,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:54,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1449045748, now seen corresponding path program 2 times [2021-07-13 18:25:54,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:54,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916325718] [2021-07-13 18:25:54,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:25:54,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:54,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916325718] [2021-07-13 18:25:54,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916325718] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:25:54,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:25:54,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 18:25:54,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318358719] [2021-07-13 18:25:54,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 18:25:54,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:54,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 18:25:54,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 18:25:54,710 INFO L87 Difference]: Start difference. First operand 876 states and 2368 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:54,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:54,841 INFO L93 Difference]: Finished difference Result 1676 states and 4552 transitions. [2021-07-13 18:25:54,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 18:25:54,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-07-13 18:25:54,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:54,846 INFO L225 Difference]: With dead ends: 1676 [2021-07-13 18:25:54,847 INFO L226 Difference]: Without dead ends: 1166 [2021-07-13 18:25:54,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:25:54,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-07-13 18:25:54,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 922. [2021-07-13 18:25:54,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.732899022801303) internal successors, (2517), 921 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:54,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2517 transitions. [2021-07-13 18:25:54,873 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2517 transitions. Word has length 40 [2021-07-13 18:25:54,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:54,875 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 2517 transitions. [2021-07-13 18:25:54,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2517 transitions. [2021-07-13 18:25:54,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-13 18:25:54,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:54,876 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:25:54,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 18:25:54,876 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:54,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:54,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1733061585, now seen corresponding path program 1 times [2021-07-13 18:25:54,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:54,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726665831] [2021-07-13 18:25:54,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:25:54,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:54,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726665831] [2021-07-13 18:25:54,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726665831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:54,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882687573] [2021-07-13 18:25:54,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:55,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 18:25:55,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:25:55,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882687573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:55,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:55,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 18:25:55,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722995838] [2021-07-13 18:25:55,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 18:25:55,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:55,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 18:25:55,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 18:25:55,211 INFO L87 Difference]: Start difference. First operand 922 states and 2517 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) [2021-07-13 18:25:55,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:55,487 INFO L93 Difference]: Finished difference Result 2146 states and 5779 transitions. [2021-07-13 18:25:55,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 18:25:55,487 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 45 [2021-07-13 18:25:55,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:55,493 INFO L225 Difference]: With dead ends: 2146 [2021-07-13 18:25:55,493 INFO L226 Difference]: Without dead ends: 1556 [2021-07-13 18:25:55,493 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-07-13 18:25:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2021-07-13 18:25:55,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1328. [2021-07-13 18:25:55,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 2.7754333082140166) internal successors, (3683), 1327 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:55,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 3683 transitions. [2021-07-13 18:25:55,540 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 3683 transitions. Word has length 45 [2021-07-13 18:25:55,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:55,540 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 3683 transitions. [2021-07-13 18:25:55,540 INFO L483 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) [2021-07-13 18:25:55,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 3683 transitions. [2021-07-13 18:25:55,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 18:25:55,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:55,542 INFO L508 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, 1, 1, 1, 1] [2021-07-13 18:25:55,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:55,759 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:55,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:55,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1274253893, now seen corresponding path program 1 times [2021-07-13 18:25:55,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:55,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605729718] [2021-07-13 18:25:55,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:55,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:25:55,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:55,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605729718] [2021-07-13 18:25:55,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605729718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:55,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452850911] [2021-07-13 18:25:55,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:55,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:55,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:25:55,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:25:56,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452850911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:56,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:56,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 18:25:56,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125483277] [2021-07-13 18:25:56,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 18:25:56,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:56,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 18:25:56,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 18:25:56,085 INFO L87 Difference]: Start difference. First operand 1328 states and 3683 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) [2021-07-13 18:25:56,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:56,283 INFO L93 Difference]: Finished difference Result 2160 states and 5889 transitions. [2021-07-13 18:25:56,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 18:25:56,283 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 50 [2021-07-13 18:25:56,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:56,289 INFO L225 Difference]: With dead ends: 2160 [2021-07-13 18:25:56,289 INFO L226 Difference]: Without dead ends: 1566 [2021-07-13 18:25:56,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:25:56,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2021-07-13 18:25:56,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1122. [2021-07-13 18:25:56,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.735950044603033) internal successors, (3067), 1121 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:56,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3067 transitions. [2021-07-13 18:25:56,311 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3067 transitions. Word has length 50 [2021-07-13 18:25:56,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:56,311 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 3067 transitions. [2021-07-13 18:25:56,311 INFO L483 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) [2021-07-13 18:25:56,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3067 transitions. [2021-07-13 18:25:56,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-13 18:25:56,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:56,313 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:25:56,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:56,529 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:56,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:56,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1431609058, now seen corresponding path program 2 times [2021-07-13 18:25:56,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:56,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685381843] [2021-07-13 18:25:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:25:56,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:56,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685381843] [2021-07-13 18:25:56,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685381843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:56,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463980125] [2021-07-13 18:25:56,629 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:56,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:25:56,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:56,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:25:56,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:25:56,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463980125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:56,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:56,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 18:25:56,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207753610] [2021-07-13 18:25:56,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 18:25:56,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:56,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 18:25:56,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 18:25:56,798 INFO L87 Difference]: Start difference. First operand 1122 states and 3067 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:57,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:57,095 INFO L93 Difference]: Finished difference Result 2676 states and 7214 transitions. [2021-07-13 18:25:57,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:25:57,096 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-07-13 18:25:57,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:57,103 INFO L225 Difference]: With dead ends: 2676 [2021-07-13 18:25:57,103 INFO L226 Difference]: Without dead ends: 2086 [2021-07-13 18:25:57,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:25:57,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-07-13 18:25:57,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1678. [2021-07-13 18:25:57,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 2.7924865831842576) internal successors, (4683), 1677 states have internal predecessors, (4683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:57,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 4683 transitions. [2021-07-13 18:25:57,136 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 4683 transitions. Word has length 55 [2021-07-13 18:25:57,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:57,136 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 4683 transitions. [2021-07-13 18:25:57,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:57,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 4683 transitions. [2021-07-13 18:25:57,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-07-13 18:25:57,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:57,139 INFO L508 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, 1, 1, 1, 1] [2021-07-13 18:25:57,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:57,358 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:57,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:57,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1063601238, now seen corresponding path program 3 times [2021-07-13 18:25:57,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:57,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949581041] [2021-07-13 18:25:57,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:25:57,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:57,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949581041] [2021-07-13 18:25:57,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949581041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:57,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199327129] [2021-07-13 18:25:57,444 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:57,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 18:25:57,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:57,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 18:25:57,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:25:57,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199327129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:57,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:57,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-13 18:25:57,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583042147] [2021-07-13 18:25:57,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 18:25:57,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:57,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 18:25:57,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:25:57,642 INFO L87 Difference]: Start difference. First operand 1678 states and 4683 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:57,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:57,932 INFO L93 Difference]: Finished difference Result 2896 states and 7789 transitions. [2021-07-13 18:25:57,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:25:57,932 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 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 60 [2021-07-13 18:25:57,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:57,940 INFO L225 Difference]: With dead ends: 2896 [2021-07-13 18:25:57,941 INFO L226 Difference]: Without dead ends: 2306 [2021-07-13 18:25:57,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2021-07-13 18:25:57,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-07-13 18:25:57,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1412. [2021-07-13 18:25:57,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 2.733522324592488) internal successors, (3857), 1411 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:57,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 3857 transitions. [2021-07-13 18:25:57,973 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 3857 transitions. Word has length 60 [2021-07-13 18:25:57,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:57,973 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 3857 transitions. [2021-07-13 18:25:57,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:57,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 3857 transitions. [2021-07-13 18:25:57,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 18:25:57,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:57,977 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:25:58,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:58,189 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:58,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:58,189 INFO L82 PathProgramCache]: Analyzing trace with hash -869732173, now seen corresponding path program 4 times [2021-07-13 18:25:58,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:58,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302842238] [2021-07-13 18:25:58,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:25:58,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:58,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302842238] [2021-07-13 18:25:58,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302842238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:58,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803034203] [2021-07-13 18:25:58,289 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:58,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:25:58,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:58,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 18:25:58,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:25:58,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803034203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:58,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:58,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-07-13 18:25:58,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749341327] [2021-07-13 18:25:58,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 18:25:58,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:58,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 18:25:58,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:25:58,494 INFO L87 Difference]: Start difference. First operand 1412 states and 3857 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) [2021-07-13 18:25:58,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:58,829 INFO L93 Difference]: Finished difference Result 3170 states and 8675 transitions. [2021-07-13 18:25:58,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:25:58,829 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 65 [2021-07-13 18:25:58,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:58,842 INFO L225 Difference]: With dead ends: 3170 [2021-07-13 18:25:58,842 INFO L226 Difference]: Without dead ends: 2356 [2021-07-13 18:25:58,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 264.4ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:25:58,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-07-13 18:25:58,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2028. [2021-07-13 18:25:58,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.8036507153428714) internal successors, (5683), 2027 states have internal predecessors, (5683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5683 transitions. [2021-07-13 18:25:58,887 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5683 transitions. Word has length 65 [2021-07-13 18:25:58,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:58,887 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5683 transitions. [2021-07-13 18:25:58,888 INFO L483 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) [2021-07-13 18:25:58,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5683 transitions. [2021-07-13 18:25:58,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-07-13 18:25:58,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:58,891 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:25:59,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:59,105 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:59,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:59,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1091589415, now seen corresponding path program 5 times [2021-07-13 18:25:59,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:59,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700894507] [2021-07-13 18:25:59,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:59,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:25:59,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:59,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700894507] [2021-07-13 18:25:59,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700894507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:59,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829467678] [2021-07-13 18:25:59,214 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:59,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 18:25:59,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:59,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:25:59,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:25:59,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829467678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:59,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:59,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-13 18:25:59,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026840382] [2021-07-13 18:25:59,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:25:59,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:59,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:25:59,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:25:59,413 INFO L87 Difference]: Start difference. First operand 2028 states and 5683 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:59,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:59,827 INFO L93 Difference]: Finished difference Result 3776 states and 10225 transitions. [2021-07-13 18:25:59,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:25:59,827 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-07-13 18:25:59,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:59,837 INFO L225 Difference]: With dead ends: 3776 [2021-07-13 18:25:59,838 INFO L226 Difference]: Without dead ends: 2876 [2021-07-13 18:25:59,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 343.2ms TimeCoverageRelationStatistics Valid=375, Invalid=1107, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 18:25:59,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-07-13 18:25:59,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2203. [2021-07-13 18:25:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 2.8079019073569484) internal successors, (6183), 2202 states have internal predecessors, (6183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:59,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 6183 transitions. [2021-07-13 18:25:59,879 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 6183 transitions. Word has length 70 [2021-07-13 18:25:59,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:59,879 INFO L482 AbstractCegarLoop]: Abstraction has 2203 states and 6183 transitions. [2021-07-13 18:25:59,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:59,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 6183 transitions. [2021-07-13 18:25:59,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-07-13 18:25:59,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:59,883 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:00,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:00,097 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:00,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:00,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1253969596, now seen corresponding path program 6 times [2021-07-13 18:26:00,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:00,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071191756] [2021-07-13 18:26:00,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:00,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:00,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071191756] [2021-07-13 18:26:00,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071191756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:00,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748836921] [2021-07-13 18:26:00,209 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:00,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 18:26:00,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:00,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:26:00,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:26:00,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748836921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:00,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:00,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-07-13 18:26:00,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108572513] [2021-07-13 18:26:00,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:26:00,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:00,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:26:00,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:26:00,423 INFO L87 Difference]: Start difference. First operand 2203 states and 6183 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) [2021-07-13 18:26:00,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:00,789 INFO L93 Difference]: Finished difference Result 3160 states and 8639 transitions. [2021-07-13 18:26:00,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:26:00,790 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 75 [2021-07-13 18:26:00,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:00,803 INFO L225 Difference]: With dead ends: 3160 [2021-07-13 18:26:00,803 INFO L226 Difference]: Without dead ends: 2656 [2021-07-13 18:26:00,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 300.9ms TimeCoverageRelationStatistics Valid=347, Invalid=985, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:26:00,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-07-13 18:26:00,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2378. [2021-07-13 18:26:00,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.8115271350441735) internal successors, (6683), 2377 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6683 transitions. [2021-07-13 18:26:00,856 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6683 transitions. Word has length 75 [2021-07-13 18:26:00,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:00,857 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6683 transitions. [2021-07-13 18:26:00,857 INFO L483 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) [2021-07-13 18:26:00,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6683 transitions. [2021-07-13 18:26:00,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-07-13 18:26:00,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:00,864 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:01,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:01,077 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:01,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:01,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1121801400, now seen corresponding path program 7 times [2021-07-13 18:26:01,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:01,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130546389] [2021-07-13 18:26:01,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-13 18:26:01,099 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-13 18:26:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-13 18:26:01,107 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-13 18:26:01,124 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-13 18:26:01,125 INFO L609 BasicCegarLoop]: Counterexample might be feasible [2021-07-13 18:26:01,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-13 18:26:01,127 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 18:26:01,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 06:26:01 BasicIcfg [2021-07-13 18:26:01,178 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 18:26:01,178 INFO L168 Benchmark]: Toolchain (without parser) took 8731.93 ms. Allocated memory was 182.5 MB in the beginning and 331.4 MB in the end (delta: 148.9 MB). Free memory was 146.1 MB in the beginning and 277.8 MB in the end (delta: -131.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 8.0 GB. [2021-07-13 18:26:01,178 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 182.5 MB. Free memory was 164.9 MB in the beginning and 164.8 MB in the end (delta: 106.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 18:26:01,178 INFO L168 Benchmark]: CACSL2BoogieTranslator took 385.72 ms. Allocated memory is still 182.5 MB. Free memory was 145.9 MB in the beginning and 160.2 MB in the end (delta: -14.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-07-13 18:26:01,178 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.36 ms. Allocated memory is still 182.5 MB. Free memory was 160.2 MB in the beginning and 158.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 18:26:01,178 INFO L168 Benchmark]: Boogie Preprocessor took 32.85 ms. Allocated memory is still 182.5 MB. Free memory was 158.2 MB in the beginning and 156.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 18:26:01,178 INFO L168 Benchmark]: RCFGBuilder took 468.15 ms. Allocated memory is still 182.5 MB. Free memory was 156.6 MB in the beginning and 135.6 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-07-13 18:26:01,179 INFO L168 Benchmark]: TraceAbstraction took 7797.22 ms. Allocated memory was 182.5 MB in the beginning and 331.4 MB in the end (delta: 148.9 MB). Free memory was 135.2 MB in the beginning and 277.8 MB in the end (delta: -142.6 MB). Peak memory consumption was 7.2 MB. Max. memory is 8.0 GB. [2021-07-13 18:26:01,179 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 182.5 MB. Free memory was 164.9 MB in the beginning and 164.8 MB in the end (delta: 106.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 385.72 ms. Allocated memory is still 182.5 MB. Free memory was 145.9 MB in the beginning and 160.2 MB in the end (delta: -14.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 43.36 ms. Allocated memory is still 182.5 MB. Free memory was 160.2 MB in the beginning and 158.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.85 ms. Allocated memory is still 182.5 MB. Free memory was 158.2 MB in the beginning and 156.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 468.15 ms. Allocated memory is still 182.5 MB. Free memory was 156.6 MB in the beginning and 135.6 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7797.22 ms. Allocated memory was 182.5 MB in the beginning and 331.4 MB in the end (delta: 148.9 MB). Free memory was 135.2 MB in the beginning and 277.8 MB in the end (delta: -142.6 MB). Peak memory consumption was 7.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [i=3, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] 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] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 1 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 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L698] 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] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L706] 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] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0, k++=0] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1, k++=0] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L706] 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] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2, k++=1] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2, k++=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L706] 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] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2, k++=2] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2, k++=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L706] 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] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3, k++=3] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4, k++=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L706] 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] [L716] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L719] 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] [L721] 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] [L722] 0 reach_error() 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 for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7659.9ms, OverallIterations: 12, TraceHistogramMax: 5, EmptinessCheckTime: 41.8ms, AutomataDifference: 2928.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 60.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1113 SDtfs, 3721 SDslu, 6199 SDs, 0 SdLazy, 1127 SolverSat, 335 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 654.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 661 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 2161.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2378occurred in iteration=11, InterpolantAutomatonStates: 211, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 414.3ms AutomataMinimizationTime, 11 MinimizatonAttempts, 4169 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 118.0ms SsaConstructionTime, 269.3ms SatisfiabilityAnalysisTime, 1850.7ms InterpolantComputationTime, 1068 NumberOfCodeBlocks, 1068 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 970 ConstructedInterpolants, 0 QuantifiedInterpolants, 3000 SizeOfPredicates, 49 NumberOfNonLiveVariables, 1008 ConjunctsInSsa, 87 ConjunctsInUnsatCore, 18 InterpolantComputations, 4 PerfectInterpolantSequences, 0/332 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...